TL-SG5426 26-Port Gigabit Managed Switch Rev: 1.0.
COPYRIGHT & TRADEMARKS ® is a registered Specifications are subject to change without notice. trademark of TP-LINK TECHNOLOGIES CO., LTD. Other brands and product names are trademarks or registered trademarks of their respective holders. No part of the specifications may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from TP-LINK TECHNOLOGIES CO., LTD. Copyright © 2008 TP-LINK TECHNOLOGIES CO., LTD.
FCC STATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Contents Chapter 1: Introduction Key Features Description of Software Features System Defaults 1-1 1-1 1-2 1-6 Chapter 2: Initial Configuration Connecting to the Switch Configuration Options Required Connections Remote Connections Basic Configuration Console Connection Setting Passwords Setting an IP Address Manual Configuration Dynamic Configuration Enabling SNMP Management Access Community Strings (for SNMP version 1 and 2c clients) Trap Receivers Configuring Access for SNMP Version 3 Clients Saving Con
Contents Saving or Restoring Configuration Settings Downloading Configuration Settings from a Server Console Port Settings Telnet Settings Configuring Event Logging Displaying Log Messages System Log Configuration Remote Log Configuration Simple Mail Transfer Protocol Renumbering the System Resetting the System Setting the System Clock Configuring SNTP Setting the Time Zone Simple Network Management Protocol Setting Community Access Strings Specifying Trap Managers and Trap Types Enabling SNMP Agent Status
Contents Binding a Port to an Access Control List Filtering IP Addresses for Management Access Port Configuration Displaying Connection Status Configuring Interface Connections Creating Trunk Groups Statically Configuring a Trunk Enabling LACP on Selected Ports Configuring LACP Parameters Displaying LACP Port Counters Displaying LACP Settings and Status for the Local Side Displaying LACP Settings and Status for the Remote Side Setting Broadcast Storm Thresholds Configuring Port Mirroring Configuring Rate Li
Contents Protocol VLAN Group Configuration Configuring Protocol VLAN Interfaces Class of Service Configuration Layer 2 Queue Settings Setting the Default Priority for Interfaces Mapping CoS Values to Egress Queues Enabling CoS Selecting the Queue Mode Setting the Service Weight for Traffic Classes Layer 3/4 Priority Settings Mapping Layer 3/4 Priorities to CoS Values Selecting IP Precedence/DSCP Priority Mapping IP Precedence Mapping DSCP Priority Mapping IP Port Priority Quality of Service Configuring Qual
Contents DHCP Snooping Information Option Configuration DHCP Snooping Port Configuration DHCP Snooping Binding Information IP Source Guard IP Source Guard Port Configuration Static IP Source Guard Binding Configuration Dynamic IP Source Guard Binding Information Switch Clustering Cluster Configuration Cluster Member Configuration Cluster Member Information Cluster Candidate Information Chapter 4: Command Line Interface Using the Command Line Interface Accessing the CLI Console Connection Telnet Connection E
Contents disconnect show line General Commands enable disable configure show history reload end exit quit System Management Commands Device Designation Commands prompt hostname User Access Commands username enable password IP Filter Commands management show management Web Server Commands ip http port ip http server ip http secure-server ip http secure-port Telnet Server Commands ip telnet port ip telnet server Secure Shell Commands ip ssh server ip ssh timeout ip ssh authentication-retries ip ssh server-key
Contents logging facility logging trap clear logging show logging show log SMTP Alert Commands logging sendmail host logging sendmail level logging sendmail source-email logging sendmail destination-email logging sendmail show logging sendmail Time Commands sntp client sntp server sntp poll show sntp clock timezone calendar set show calendar System Status Commands show startup-config show running-config show system show users show version Frame Size Commands jumbo frame Flash/File Commands copy delete dir w
Contents TACACS+ Client tacacs-server host tacacs-server port tacacs-server key show tacacs-server Port Security Commands port security 802.
Contents show snmp engine-id snmp-server view show snmp view snmp-server group show snmp group snmp-server user show snmp user Interface Commands interface description speed-duplex negotiation capabilities flowcontrol shutdown switchport broadcast packet-rate clear counters show interfaces status show interfaces counters show interfaces switchport Mirror Port Commands port monitor show port monitor Rate Limit Commands rate-limit Link Aggregation Commands channel-group lacp lacp system-priority lacp admin-ke
Contents spanning-tree priority spanning-tree pathcost method spanning-tree transmission-limit spanning-tree mst-configuration mst vlan mst priority name revision max-hops spanning-tree spanning-disabled spanning-tree cost spanning-tree port-priority spanning-tree edge-port spanning-tree portfast spanning-tree link-type spanning-tree mst cost spanning-tree mst port-priority spanning-tree protocol-migration show spanning-tree show spanning-tree mst configuration VLAN Commands GVRP and Bridge Extension Comman
Contents Related Commands show dot1q-tunnel Configuring Private VLANs pvlan show pvlan Configuring Protocol-based VLANs protocol-vlan protocol-group (Configuring Groups) protocol-vlan protocol-group (Configuring Interfaces) show protocol-vlan protocol-group show interfaces protocol-vlan protocol-group Priority Commands Priority Commands (Layer 2) queue mode switchport priority default queue bandwidth queue cos-map show queue mode show queue bandwidth show queue cos-map Priority Commands (Layer 3 and 4) map
Contents ip igmp snooping querier ip igmp snooping query-count ip igmp snooping query-interval ip igmp snooping query-max-response-time ip igmp snooping router-port-expire-time Static Multicast Routing Commands ip igmp snooping vlan mrouter show ip igmp snooping mrouter IGMP Filtering and Throttling Commands ip igmp filter (Global Configuration) ip igmp profile permit, deny range ip igmp filter (Interface Configuration) ip igmp max-groups ip igmp max-groups action show ip igmp filter show ip igmp profile sh
Contents cluster cluster commander cluster ip-pool cluster member rcommand show cluster show cluster members show cluster candidates 4-238 4-239 4-239 4-240 4-240 4-241 4-241 4-242 Appendix A: Software Specifications Software Features Management Features Standards Management Information Bases A-1 A-1 A-2 A-2 A-3 Appendix B: Troubleshooting Problems Accessing the Management Interface Using System Logs B-1 B-1 B-2 Glossary Index xiii
Contents xiv
Tables Table 1-1 Table 1-2 Table 3-1 Table 3-2 Table 3-3 Table 3-4 Table 3-5 Table 3-6 Table 3-7 Table 3-8 Table 3-9 Table 3-10 Table 3-11 Table 3-12 Table 3-13 Table 3-14 Table 4-1 Table 4-2 Table 4-3 Table 4-4 Table 4-5 Table 4-6 Table 4-7 Table 4-8 Table 4-9 Table 4-10 Table 4-11 Table 4-12 Table 4-13 Table 4-14 Table 4-15 Table 4-16 Table 4-17 Table 4-18 Table 4-19 Table 4-20 Table 4-21 Table 4-22 Table 4-23 Table 4-24 Table 4-25 Table 4-26 Key Features System Defaults Configuration Options Main Menu L
Tables Table 4-27 Table 4-28 Table 4-29 Table 4-30 Table 4-31 Table 4-32 Table 4-33 Table 4-34 Table 4-35 Table 4-36 Table 4-37 Table 4-38 Table 4-39 Table 4-40 Table 4-41 Table 4-42 Table 4-43 Table 4-44 Table 4-45 Table 4-46 Table 4-47 Table 4-48 Table 4-49 Table 4-50 Table 4-51 Table 4-52 Table 4-53 Table 4-54 Table 4-55 Table 4-56 Table 4-57 Table 4-58 Table 4-58 Table 4-58 Table 4-58 Table 4-59 Table 4-60 Table 4-61 Table 4-62 Table 4-63 Table 4-64 Table 4-65 Table 4-66 Table 4-67 Table 4-68 xvi Authe
Tables Table 4-69 Table 4-70 Table 4-71 Table 4-72 Table 4-73 Table 4-74 Table 4-75 Table 4-76 Table 4-77 Table 4-78 Table 4-79 Table B-1 IGMP Query Commands (Layer 2) Static Multicast Routing Commands IGMP Filtering and Throttling Commands Multicast VLAN Registration Commands show mvr - display description show mvr interface - display description show mvr members - display description IP Interface Commands IP Source Guard Commands DHCP Snooping Commands Switch Cluster Commands Troubleshooting Chart 4-206
Tables xviii
Figures Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 3-8 Figure 3-9 Figure 3-10 Figure 3-11 Figure 3-12 Figure 3-13 Figure 3-14 Figure 3-15 Figure 3-16 Figure 3-17 Figure 3-18 Figure 3-19 Figure 3-20 Figure 3-21 Figure 3-22 Figure 3-23 Figure 3-24 Figure 3-25 Figure 3-26 Figure 3-27 Figure 3-28 Figure 3-29 Figure 3-30 Figure 3-31 Figure 3-32 Figure 3-33 Figure 3-34 Figure 3-35 Figure 3-36 Figure 3-37 Figure 3-38 Figure 3-39 Figure 3-40 Figure 3-41 Figure 3-42 Home Pag
Figures Figure 3-43 Figure 3-44 Figure 3-45 Figure 3-46 Figure 3-47 Figure 3-48 Figure 3-49 Figure 3-50 Figure 3-51 Figure 3-52 Figure 3-53 Figure 3-54 Figure 3-55 Figure 3-56 Figure 3-57 Figure 3-58 Figure 3-59 Figure 3-60 Figure 3-61 Figure 3-62 Figure 3-63 Figure 3-64 Figure 3-65 Figure 3-66 Figure 3-67 Figure 3-68 Figure 3-69 Figure 3-70 Figure 3-71 Figure 3-72 Figure 3-73 Figure 3-74 Figure 3-75 Figure 3-76 Figure 3-77 Figure 3-78 Figure 3-79 Figure 3-80 Figure 3-81 Figure 3-82 Figure 3-83 Figure 3-84
Figures Figure 3-88 Figure 3-89 Figure 3-90 Figure 3-91 Figure 3-92 Figure 3-93 Figure 3-94 Figure 3-95 Figure 3-96 Figure 3-97 Figure 3-98 Figure 3-99 Figure 3-100 Figure 3-101 Figure 3-102 Figure 3-103 Figure 3-104 Figure 3-105 Figure 3-106 Figure 3-107 Figure 3-108 Figure 3-109 Figure 3-110 Figure 3-111 Figure 3-112 Figure 3-113 Figure 3-114 Figure 3-115 Figure 3-116 Figure 3-117 Figure 3-118 Figure 3-119 Figure 3-120 Figure 3-121 Figure 3-122 Figure 3-123 Figure 3-124 Figure 3-125 Figure 3-126 Configur
Figures xxii
Chapter 1: Introduction This switch provides a broad range of features for Layer 2 switching. It includes a management agent that allows you to configure the features listed in this manual. The default configuration can be used for most of the features provided by this switch. However, there are many options that you should configure to maximize the switch’s performance for your particular network environment.
1 Introduction Table 1-1 Key Features Feature Description Switch Clustering Supports up to 16 Member switches in a cluster Description of Software Features The switch provides a wide range of advanced performance enhancing features. Flow control eliminates the loss of packets due to bottlenecks caused by port saturation. Broadcast storm suppression prevents broadcast traffic storms from engulfing the network.
Description of Software Features 1 Rate Limiting – This feature controls the maximum rate for traffic transmitted or received on an interface. Rate limiting is configured on interfaces at the edge of a network to limit traffic into the network. Traffic that falls within the rate limit is transmitted while packets that exceed the acceptable amount of traffic are dropped. Port Mirroring – The switch can unobtrusively mirror traffic from any port to a monitor port.
1 Introduction seconds or more for the older IEEE 802.1D STP standard. It is intended as a complete replacement for STP, but can still interoperate with switches running the older standard by automatically reconfiguring ports to STP-compliant mode if they detect STP protocol messages from attached devices. Multiple Spanning Tree Protocol (MSTP, IEEE 802.1s) – This protocol is a direct extension of RSTP. It can provide an independent spanning tree for different VLANs.
Description of Software Features 1 Multicast Filtering – Specific multicast traffic can be assigned to its own VLAN to ensure that it does not interfere with normal network traffic and to guarantee real-time delivery by setting the required priority level for the designated VLAN. The switch uses IGMP Snooping and Query to manage multicast group registration.
1 Introduction System Defaults The switch’s system defaults are provided in the configuration file “Factory_Default_Config.cfg.” To reset the switch defaults, this file should be set as the startup configuration file (page 3-19). The following table lists some of the basic system defaults.
System Defaults 1 Table 1-2 System Defaults (Continued) Function Parameter Default Port Configuration Admin Status Enabled Auto-negotiation Enabled Flow Control Disabled Rate Limiting Input and output limits Disabled Port Trunking Static Trunks None LACP (all ports) Disabled Status Enabled (all ports) Broadcast Limit Rate 500 packets per second Status Enabled, RSTP (Defaults: All values based on IEEE 802.
1 Introduction Table 1-2 System Defaults (Continued) Function Parameter Default System Log Status Enabled Messages Logged Levels 0-7 (all) Messages Logged to Flash Levels 0-3 SMTP Email Alerts Event Handler Enabled (but no server defined) SNTP Clock Synchronization Disabled DHCP Snooping Status Disabled IP Source Guard Status Disabled (all ports) Switch Clustering Status Enabled Commander Disabled 1-8
Chapter 2: Initial Configuration Connecting to the Switch Configuration Options The switch includes a built-in network management agent. The agent offers a variety of management options, including SNMP, RMON (Groups 1, 2, 3, 9) and a web-based interface. A PC may also be connected directly to the switch for configuration and monitoring via a command line interface (CLI). Note: The IP address for this switch is obtained via DHCP by default. To change this address, see “Setting an IP Address” on page 2-4.
2 • • • • Initial Configuration Configure up to 32 static or LACP trunks Enable port mirroring Set broadcast storm control on any port Display system information and statistics Required Connections The switch provides an RS-232 serial port that enables a connection to a PC or terminal for monitoring and configuring the switch. A null-modem console cable is provided with the switch. Attach a VT100-compatible terminal, or a PC running a terminal emulation program to the switch.
2 Basic Configuration Remote Connections Prior to accessing the switch’s onboard agent via a network connection, you must first configure it with a valid IP address, subnet mask, and default gateway using a console connection, DHCP or BOOTP protocol. The IP address for this switch is obtained via DHCP by default. To manually configure this address or enable dynamic address assignment via DHCP or BOOTP, see “Setting an IP Address” on page 2-4. Note: This switch supports four concurrent Telnet/SSH sessions.
2 Initial Configuration Setting Passwords Note: If this is your first time to log into the CLI program, you should define new passwords for both default user names using the “username” command, record them and put them in a safe place. Passwords can consist of up to 8 alphanumeric characters and are case sensitive. To prevent unauthorized access to the switch, set the passwords as follows: 1. Open the console interface with the default user name and password “admin” to access the Privileged Exec level.
Basic Configuration 2 Before you can assign an IP address to the switch, you must obtain the following information from your network administrator: • IP address for the switch • Default gateway for the network • Network mask for this network To assign an IP address to the switch, complete the following steps: 1. From the Privileged Exec level global configuration mode prompt, type “interface vlan 1” to access the interface-configuration mode. Press . 2.
2 Initial Configuration 5. Wait a few minutes, and then check the IP configuration settings by typing the “show ip interface” command. Press . 6. Then save your configuration changes by typing “copy running-config startup-config.” Enter the startup file name and press . Console(config)#interface vlan 1 Console(config-if)#ip address dhcp Console(config-if)#end Console#ip dhcp restart Console#show ip interface IP address and netmask: 192.168.1.54 255.255.255.
Basic Configuration 2 The default strings are: • public - with read-only access. Authorized management stations are only able to retrieve MIB objects. • private - with read-write access. Authorized management stations are able to both retrieve and modify MIB objects. To prevent unauthorized access to the switch from SNMP version 1 or 2c clients, it is recommended that you change the default community strings. To configure a community string, complete the following steps: 1.
2 Initial Configuration Configuring Access for SNMP Version 3 Clients To configure management access for SNMPv3 clients, you need to first create a view that defines the portions of MIB that the client can read or write, assign the view to a group, and then assign the user to a group. The following example creates one view called “mib-2” that includes the entire MIB-2 tree branch, and then another view that includes the IEEE 802.1d bridge MIB.
2 2-10 Initial Configuration
Chapter 3: Configuring the Switch Using the Web Interface This switch provides an embedded HTTP web agent. Using a web browser you can configure the switch and view statistics to monitor network activity. The web agent can be accessed by any computer on the network using a standard web browser (Internet Explorer 5.0 or above, or Netscape 6.2 or above). Note: You can also use the Command Line Interface (CLI) to manage the switch over a serial connection to the console port or via Telnet.
3 Configuring the Switch Navigating the Web Browser Interface To access the web-browser interface you must first enter a user name and password. The administrator has Read/Write access to all configuration parameters and statistics. The default user name and password for the administrator is “admin.” Home Page When your web browser connects with the switch’s web agent, the home page is displayed as shown below.
Navigating the Web Browser Interface 3 Configuration Options Configurable parameters have a dialog box or a drop-down list. Once a configuration change has been made on a page, be sure to click on the Apply button to confirm the new setting. The following table summarizes the web page configuration buttons. Table 3-1 Configuration Options Button Action Revert Cancels specified values and restores current values prior to pressing Apply. Apply Sets specified values to the system.
3 Configuring the Switch Main Menu Using the onboard web agent, you can define system parameters, manage and control the switch, and all its ports, or monitor network conditions. The following table briefly describes the selections available from this program.
Navigating the Web Browser Interface 3 Table 3-2 Main Menu (Continued) Menu Description Page Engine ID Sets the SNMP v3 engine ID on this switch 3-36 Remote Engine ID Sets the SNMP v3 engine ID for a remote device 3-37 Users Configures SNMP v3 users on this switch 3-37 Remote Users Configures SNMP v3 users from a remote device 3-40 Groups Configures SNMP v3 groups 3-41 Views Configures SNMP v3 views 3-45 User Accounts Assigns a new password for the current user 3-46 Authentication
3 Configuring the Switch Table 3-2 Main Menu (Continued) Menu Description Page Aggregation Port Configures parameters for link aggregation group members 3-84 Port Counters Information Displays statistics for LACP protocol messages 3-86 Port Internal Information Displays settings and operational state for the local side Port Neighbors Information Displays settings and operational state for the remote side 3-88 3-90 Port Broadcast Control Sets the broadcast storm threshold for each port 3-91
Navigating the Web Browser Interface 3 Table 3-2 Main Menu (Continued) Menu Description VLAN Page 3-122 802.1Q VLAN 3-122 GVRP Status Enables GVRP VLAN registration protocol 3-125 802.
3 Configuring the Switch Table 3-2 Main Menu (Continued) Menu IP DSCP Priority Description Page Sets IP Differentiated Services Code Point priority, mapping a DSCP tag to a class-of-service value 3-152 IP Port Prioriey Status Globally enables or disables IP Port Priority 3-153 IP Port Priority Sets TCP/UDP port priority, defining the socket number and associated class-of-service value 3-153 QoS 3-154 DiffServ Class Map 3-154 Sets Class Maps 3-155 Policy Map Sets Policy Maps 3-158 Servic
Navigating the Web Browser Interface 3 Table 3-2 Main Menu (Continued) Menu Description Page Port Configuration Configures MVR interface type and immediate leave status 3-179 Trunk Configuration Configures MVR interface type and immediate leave status 3-179 Group Member Configuration Statically assigns MVR multicast streams to an interface 3-180 DNS General Configuration Enables DNS; configures domain name and domain list; and specifies IP address of name servers for dynamic lookup 3-181 Sta
3 Configuring the Switch Basic Configuration Displaying System Information You can easily identify the system by displaying the device name, location and contact information. Field Attributes • • • • • System Name – Name assigned to the switch system. Object ID – MIB II object ID for switch’s network management subsystem. Location – Specifies the system location. Contact – Administrator responsible for the system. System Up Time – Length of time the management agent has been up.
Managing System Files 2 Managing System Files The switch’s flash memory supports three types of system files that can be managed by the CLI program, web interface, or SNMP. The switch’s file system allows files to be uploaded and downloaded, copied, deleted, and set as a start-up file. The three types of files are: • Configuration — This file stores system configuration information and is created when configuration settings are saved.
Basic Configuration 3 CLI – Specify the hostname, location and contact information. Console(config)#hostname R&D 5 4-25 Console(config)#snmp-server location WC 9 4-103 Console(config)#snmp-server contact Ted 4-103 Console(config)#exit Console#show system 4-61 System Description: TL-SG5426 System OID String: 1.3.6.1.4.1.11863.6.10.58 System Information System Up Time: 0 days, 0 hours, 2 minutes, and 57.
3 Configuring the Switch Web – Click System, Switch Information. Figure 3-4 Switch Information CLI – Use the following command to display version information. Console#show version Unit 1 Serial Number: Hardware Version: EPLD Version: Number of Ports: Main Power Status: Redundant Power Status: !!!!!!!!!! !!! 1.02 26 Up Not present Agent (Master) Unit ID: Loader Version: Boot ROM Version: Operation Code Version: 1 1.0.0.4 1.0.0.5 1.0.0.
Basic Configuration 3 Displaying Bridge Extension Capabilities The Bridge MIB includes extensions for managed devices that support Multicast Filtering, Traffic Classes, and Virtual LANs. You can access these extensions to display default settings for the key variables. Field Attributes • Extended Multicast Filtering Services – This switch does not support the filtering of individual multicast addresses based on GMRP (GARP Multicast Registration Protocol).
3 Configuring the Switch CLI – Enter the following command. Console#show bridge-ext Max support VLAN numbers: Max support VLAN ID: Extended multicast filtering services: Static entry individual port: VLAN learning: Configurable PVID tagging: Local VLAN capable: Traffic classes: Global GVRP status: GMRP: Console# 4-164 256 4094 No Yes IVL Yes No Enabled Disabled Disabled Setting the Switch’s IP Address This section describes how to configure an IP interface for management access over the network.
3 Basic Configuration Manual Configuration Web – Click System, IP Configuration. Select the VLAN through which the management station is attached, set the IP Address Mode to “Static,” enter the IP address, subnet mask and gateway, then click Apply. Figure 3-6 Manual IP Configuration CLI – Specify the management interface, IP address and default gateway. Console#config Console(config)#interface vlan 1 Console(config-if)#ip address 192.168.1.1 255.255.255.
3 Configuring the Switch Using DHCP/BOOTP If your network provides DHCP/BOOTP services, you can configure the switch to be dynamically configured by these services. Web – Click System, IP Configuration. Specify the VLAN to which the management station is attached, set the IP Address Mode to DHCP or BOOTP. Click Apply to save your changes. Then click Restart DHCP to immediately request a new address. Note that the switch will also broadcast a request for IP configuration settings on each power reset.
3 Basic Configuration Web – If the address assigned by DHCP is no longer functioning, you will not be able to renew the IP settings via the web interface. You can only restart DHCP service via the web interface if the current address is still available. CLI – Enter the following command to restart DHCP service. Console#ip dhcp restart Console# 4-225 Enabling Jumbo Frames You can enable jumbo frames to support data packets up to 9000 bytes in size.
3 Configuring the Switch • File Name – The file name should not contain slashes (\ or /), the leading letter of the file name should not be a period (.), and the maximum length for file names on the TFTP server is 127 characters or 31 characters for files on the switch. (Valid characters: A-Z, a-z, 0-9, “.”, “-”, “_”) Note: Up to two copies of the system software (i.e., the runtime firmware) can be stored in the file directory on the switch.
Basic Configuration 3 To delete a file select System, File, Delete. Select the file name from the given list by checking the tick box and click Apply. Note that the file currently designated as the startup code cannot be deleted. Figure 3-11 Deleting Files CLI – To download new firmware form a TFTP server, enter the IP address of the TFTP server, select “opcode” as the file type, then enter the source and destination file names.
3 Configuring the Switch - tftp to file – Copies a file from a TFTP server to the switch. - tftp to running-config – Copies a file from a TFTP server to the running config. - tftp to startup-config – Copies a file from a TFTP server to the startup config. • TFTP Server IP Address – The IP address of a TFTP server. • File Type – Specify config (configuration) to copy configuration settings.
Basic Configuration 3 Note: You can also select any configuration file as the start-up configuration by using the System/File/Set Start-Up page. Figure 3-13 Setting the Startup Configuration Settings CLI – Enter the IP address of the TFTP server, specify the source file on the server, set the startup file name on the switch, and then restart the switch. Console#copy tftp startup-config TFTP server ip address: 192.168.1.
3 • • • • • Configuring the Switch system interface becomes silent for a specified amount of time (set by the Silent Time parameter) before allowing the next logon attempt. (Range: 0-120; Default: 3 attempts) Silent Time – Sets the amount of time the management console is inaccessible after the number of unsuccessful logon attempts has been exceeded. (Range: 0-65535; Default: 0) Data Bits – Sets the number of data bits per character that are interpreted and generated by the console port.
3 Basic Configuration CLI – Enter Line Configuration mode for the console, then specify the connection parameters as required. To display the current console port settings, use the show line command from the Normal Exec level.
3 Configuring the Switch system interface becomes silent for a specified amount of time (set by the Silent Time parameter) before allowing the next logon attempt. (Range: 0-120; Default: 3 attempts) • Password2 – Specifies a password for the line connection. When a connection is started on a line with password protection, the system prompts for the password. If you enter the correct password, the system shows a prompt. (Default: No password) • Login2 – Enables password checking at login.
3 Basic Configuration CLI – Enter Line Configuration mode for a virtual terminal, then specify the connection parameters as required. To display the current virtual terminal settings, use the show line command from the Normal Exec level.
3 Configuring the Switch CLI – This example shows the event message stored in RAM. Console#show log ram [1] 00:00:27 2001-01-01 "VLAN 1 link-up notification." level: 6, module: 5, function: 1, and event no.: 1 [0] 00:00:25 2001-01-01 "System coldStart notification." level: 6, module: 5, function: 1, and event no.: 1 Console# 4-47 System Log Configuration The system allows you to enable or disable event logging, and specify which levels are logged to RAM or flash memory.
3 Basic Configuration Web – Click System, Log, System Logs. Specify System Log Status, set the level of event messages to be logged to RAM and flash memory, then click Apply. Figure 3-17 System Logs CLI – Enable system logging and then specify the level of messages to be logged to RAM and flash memory. Use the show logging command to display the current settings.
3 Configuring the Switch • Host IP Address – Specifies a new server IP address to add to the Host IP List. Web – Click System, Log, Remote Logs. To add an IP address to the Host IP List, type the new IP address in the Host IP Address box, and then click Add. To delete an IP address, click the entry in the Host IP List, and then click Remove. Figure 3-18 Remote Logs CLI – Enter the syslog server host IP address, choose the facility type and set the logging trap. Console(config)#logging host 192.168.1.
Basic Configuration 3 • Severity – Specifies the degree of urgency that the message carries. • Debugging – Sends a debugging notification. (Level 7) • Information – Sends informatative notification only. (Level 6) • Notice – Sends notification of a normal but significant condition, such as a cold start. (Level 5) • Warning – Sends notification of a warning condition such as return false, or unexpected return.
3 Configuring the Switch CLI – Enter the host ip address, followed by the mail severity level, source and destination email addresses and enter the sendmail command to complete the action. Use the show logging command to display SMTP information. Renumbering the System Web – Click System, Renumber. Click the Renumber button to renumber the switch. When prompted, confirm that you want to renumber the switch. Figure 3-20 Renumbering the System CLI – Use the reload command to restart the switch.
Basic Configuration 3 Setting the System Clock Simple Network Time Protocol (SNTP) allows the switch to set its internal clock based on periodic updates from a time server (SNTP or NTP). Maintaining an accurate time on the switch enables the system log to record meaningful dates and times for event entries. You can also manually set the clock using the CLI. (See “calendar set” on page 4-56) If the clock is not set, the switch will only record the time from the factory default set at the last bootup.
3 Configuring the Switch CLI – This example configures the switch to operate as an SNTP unicast client and then displays the current time and settings. Console(config)#sntp server 10.1.0.19 137.82.140.80 128.250.36.2 Console(config)#sntp poll 60 Console(config)#sntp client Console(config)#exit Console#show sntp Current time: Jan 6 14:56:05 2004 Poll interval: 16 Current mode: unicast SNTP status : Enabled SNTP server 10.1.0.19 137.82.140.80 128.250.36.2 Current server: 128.250.36.
Simple Network Management Protocol 3 Simple Network Management Protocol Simple Network Management Protocol (SNMP) is a communication protocol designed specifically for managing devices on a network. Equipment commonly managed with SNMP includes switches, routers and host computers. SNMP is typically used to configure these devices for proper operation in a network environment, as well as to monitor them to evaluate performance or detect potential problems.
3 Configuring the Switch Web – Click SNMP, Configuration. Add new community strings as required, select the access rights from the Access Mode drop-down list, then click Add. Figure 3-24 Configuring SNMP Community Strings CLI – The following example adds the string “spiderman” with read/write access. Console(config)#snmp-server community spiderman rw Console(config)# 4-102 Specifying Trap Managers and Trap Types Traps indicating status changes are issued by the switch to specified trap managers.
Simple Network Management Protocol 3 Web – Click SNMP, Configuration. Fill in the IP address and community string for each trap manager that will receive trap messages, and then click Add. Select the trap types required using the check boxes for Authentication and Link-up/down traps, and then click Apply. Figure 3-25 Configuring IP Trap Managers CLI – This example adds a trap manager and enables both authentication and link-up, link-down traps. Console(config)#snmp-server host 192.168.1.
3 Configuring the Switch Configuring SNMPv3 Management Access To configure SNMPv3 management access to the switch, follow these steps: 1. If you want to change the default engine ID, it must be changed first before configuring other parameters. 2. Specify read and write access views for the switch MIB tree. 3. Configure SNMP user groups with the required security model (i.e., SNMP v1, v2c or v3) and security level (i.e., authentication and privacy). 4.
3 Simple Network Management Protocol Specifying a Remote Engine ID To send inform messages to an SNMPv3 user on a remote device, you must first specify the engine identifier for the SNMP agent on the remote device where the user resides. The remote engine ID is used to compute the security digest for authenticating and encrypting packets sent to a user on the remote host. SNMP passwords are localized using the engine ID of the authoritative agent.
3 Configuring the Switch • Level – The security level used for the user: - noAuthNoPriv – There is no authentication or encryption used in SNMP communications. (This is the default for SNMPv3.) - AuthNoPriv – SNMP communications use authentication, but the data is not encrypted (only available for the SNMPv3 security model). - AuthPriv – SNMP communications use both authentication and encryption (only available for the SNMPv3 security model). • Authentication – The method used for user authentication.
3 Simple Network Management Protocol Web – Click SNMP, SNMPv3, Users. Click New to configure a user name. In the New User page, define a name and assign it to a group, then click Add to save the configuration and return to the User Name list. To delete a user, check the box next to the user name, then click Delete. To change the assigned group of a user, click Change Group in the Actions column of the users table and select the new group.
3 Configuring the Switch Configuring Remote SNMPv3 Users Each SNMPv3 user is defined by a unique name. Users must be configured with a specific security level and assigned to a group. The SNMPv3 group restricts users to a specific read, write, and notify view. To send inform messages to an SNMPv3 user on a remote device, you must first specify the engine identifier for the SNMP agent on the remote device where the user resides.
3 Simple Network Management Protocol CLI – Use the snmp-server user command to configure a new user name and assign it to a group. Console(config)#snmp-server user mark group r&d remote 192.168.1.19 v3 auth md5 greenpeace priv des56 einstien 4-113 Console(config)#exit Console#show snmp user 4-113 No user exist.
3 Configuring the Switch • Notify View – The configured view for notifications. (Range: 1-64 characters) Table 3-4 Supported Notification Messages Object Label Object ID Description newRoot 1.3.6.1.2.1.17.0.1 The newRoot trap indicates that the sending agent has become the new root of the Spanning Tree; the trap is sent by a bridge soon after its election as the new root, e.g., upon expiration of the Topology Change Timer immediately subsequent to its election. topologyChange 1.3.6.1.2.1.17.0.
3 Simple Network Management Protocol Table 3-4 Supported Notification Messages (Continued) Object Label Object ID Description authenticationFailure 1.3.6.1.6.3.1.1.5.5 An authenticationFailure trap signifies that the SNMPv2 entity, acting in an agent role, has received a protocol message that is not properly authenticated. While all implementations of the SNMPv2 must be capable of generating this trap, the snmpEnableAuthenTraps object indicates whether this trap will be generated. risingAlarm 1.3.6.
3 Configuring the Switch Web – Click SNMP, SNMPv3, Groups. Click New to configure a new group. In the New Group page, define a name, assign a security model and level, and then select read and write views. Click Add to save the new group and return to the Groups list. To delete a group, check the box next to the group name, then click Delete.
Simple Network Management Protocol 3 Setting SNMPv3 Views SNMPv3 views are used to restrict user access to specified portions of the MIB tree. The predefined view “defaultview” includes access to the entire MIB tree. Command Attributes • View Name – The name of the SNMP view. (Range: 1-64 characters) • View OID Subtrees – Shows the currently configured object identifiers of branches within the MIB tree that define the SNMP view.
3 Configuring the Switch CLI – Use the snmp-server view command to configure a new view. This example view includes the MIB-2 interfaces table, and the wildcard mask selects all index entries.. Console(config)#snmp-server view ifEntry.a 1.3.6.1.2.1.2.2.1.1.* included4-115 Console(config)#exit Console#show snmp view4-116 View Name: ifEntry.a Subtree OID: 1.3.6.1.2.1.2.2.1.1.* View Type: included Storage Type: nonvolatile Row Status: active View Name: readaccess Subtree OID: 1.3.6.1.
User Authentication 3 • New Account – Displays configuration settings for a new account. - User Name – The name of the user. (Maximum length: 8 characters; maximum number of users: 16) - Access Level – Specifies the user level. (Options: Normal and Privileged) - Password – Specifies the user password. (Range: 0-8 characters plain text, case sensitive) • Change Password – Sets a new password for the specified user name. • Add/Remove – Adds or removes an account from the list.
3 Configuring the Switch Configuring Local/Remote Logon Authentication Use the Authentication Settings menu to restrict management access based on specified user names and passwords. You can manually configure access rights on the switch, or you can use a remote access authentication server based on RADIUS or TACACS+ protocols.
User Authentication 3 Command Attributes • Authentication – Select the authentication, or authentication sequence required: - Local – User authentication is performed only locally by the switch. - Radius – User authentication is performed using a RADIUS server only. - TACACS – User authentication is performed using a TACACS+ server only. - [authentication sequence] – User authentication is performed by up to three authentication methods in the indicated sequence.
3 Configuring the Switch Web – Click Security, Authentication Settings. To configure local or remote authentication preferences, specify the authentication sequence (i.e., one to three methods), fill in the parameters for RADIUS or TACACS+ authentication if selected, and click Apply.
User Authentication 3 CLI – Specify all the required parameters to enable logon authentication. Console(config)#authentication login radius Console(config)#radius-server port 181 Console(config)#radius-server key green Console(config)#radius-server retransmit 5 Console(config)#radius-server timeout 10 Console(config)#radius-server 1 host 192.168.1.
3 Configuring the Switch Configuring HTTPS You can configure the switch to enable the Secure Hypertext Transfer Protocol (HTTPS) over the Secure Socket Layer (SSL), providing secure access (i.e., an encrypted connection) to the switch’s web interface. Command Usage • Both the HTTP and HTTPS service can be enabled independently on the switch. However, you cannot configure both services to use the same UDP port.
3 User Authentication CLI – This example enables the HTTP secure server and modifies the port number. Console(config)#ip http secure-server Console(config)#ip http secure-port 443 Console(config)# 4-30 4-31 Replacing the Default Secure-site Certificate When you log onto the web interface using HTTPS (for secure access), a Secure Sockets Layer (SSL) certificate appears for the switch.
3 Configuring the Switch Configuring the Secure Shell The Berkley-standard includes remote access tools originally designed for Unix systems. Some of these tools have also been implemented for Microsoft Windows and other environments. These tools, including commands such as rlogin (remote login), rsh (remote shell), and rcp (remote copy), are not secure from hostile attacks.
User Authentication 3. 3 Import Client’s Public Key to the Switch – Use the copy tftp public-key command (4-64) to copy a file containing the public key for all the SSH client’s granted management access to the switch. (Note that these clients must be configured locally on the switch via the User Accounts page as described on 3-46.) The clients are subsequently authenticated using these keys.
3 Configuring the Switch Configuring the SSH Server The SSH server includes basic settings for authentication. Field Attributes • SSH Server Status – Allows you to enable/disable the SSH server on the switch. (Default: Disabled) • Version – The Secure Shell version number. Version 2.0 is displayed, but the switch supports management access via either SSH Version 1.5 or 2.0 clients.
3 User Authentication CLI – This example enables SSH, sets the authentication parameters, and displays the current configuration. It shows that the administrator has made a connection via SHH, and then disables this connection. Console(config)#ip ssh server 4-35 Console(config)#ip ssh timeout 100 4-36 Console(config)#ip ssh authentication-retries 5 4-37 Console(config)#ip ssh server-key size 512 4-37 Console(config)#end Console#show ip ssh 4-40 SSH Enabled - version 2.
3 Configuring the Switch Web – Click Security, SSH, Host-Key Settings. Select the host-key type from the drop-down box, select the option to save the host key from memory to flash (if required) prior to generating the key, and then click Generate. Figure 3-37 SSH Host-Key Settings CLI – This example generates a host-key pair using both the RSA and DSA algorithms, stores the keys to flash memory, and then displays the host’s public keys.
User Authentication 3 Configuring Port Security Port security is a feature that allows you to configure a switch port with one or more device MAC addresses that are authorized to access the network through that port. When port security is enabled on a port, the switch stops learning new MAC addresses on the specified port when it has reached a configured maximum number.
3 Configuring the Switch Web – Click Security, Port Security. Set the action to take when an invalid address is detected on a port, mark the checkbox in the Status column to enable security for a port, set the maximum number of MAC addresses allowed on a port, and click Apply.
User Authentication 3 This switch uses the Extensible Authentication Protocol over LANs (EAPOL) 802.1x to exchange authentication client protocol messages with the client, and a remote RADIUS 1. Client attempts to access a switch port. authentication server to verify 2. Switch sends client an identity request. 3. Client sends back identity information. RADIUS user identity and access 4. Switch forwards this to authentication server. server 5. Authentication server challenges client. rights.
3 Configuring the Switch Web – Click Security, 802.1X, Information. Figure 3-39 802.1X Global Information CLI – This example shows the default global setting for 802.1X. Console#show dot1x Global 802.1X Parameters system-auth-control: enable 4-86 802.1X Port Summary Port Name Status 1/1 disabled 1/2 disabled . . 802.1X Port Details Operation Mode Single-Host Single-Host Mode ForceAuthorized ForceAuthorized Authorized n/a n/a 802.1X is disabled on port 1/1 . . 802.
3 User Authentication Configuring Port Settings for 802.1X When 802.1X is enabled, you need to configure the parameters for the authentication process that runs between the client and the switch (i.e., authenticator), as well as the client identity lookup process that runs between the switch and authentication server. These parameters are described in this section. Command Attributes • Port – Port number. • Status – Indicates if authentication is enabled or disabled on the port.
3 Configuring the Switch Figure 3-41 802.
User Authentication 3 CLI – This example sets the 802.1X parameters on port 2. For a description of the additional fields displayed in this example, see “show dot1x” on page 4-86.
3 Configuring the Switch Displaying 802.1X Statistics This switch can display statistics for dot1x protocol exchanges for any port. Table 3-6 802.1X Statistics Parameter Description Rx EAPOL Start The number of EAPOL Start frames that have been received by this Authenticator. Rx EAPOL Logoff The number of EAPOL Logoff frames that have been received by this Authenticator.
3 Access Control Lists CLI – This example displays the 802.1X statistics for port 4.
3 Configuring the Switch 3. Explicit default rule (permit any any) in the ingress IP ACL for ingress ports. 4. If no explicit rule is matched, the implicit default is permit all. Setting the ACL Name and Type Use the ACL Configuration page to designate the name and type of an ACL. Command Attributes • Name – Name of the ACL. (Maximum length: 15 characters) • Type – There are three filtering modes: - Standard – IP ACL mode that filters packets based on the source IP address.
Access Control Lists 3 Configuring a Standard IP ACL Command Attributes • Action – An ACL can contain any combination of permit or deny rules. • Address Type – Specifies the source IP address. Use “Any” to include all possible addresses, “Host” to specify a specific host address in the Address field, or “IP” to specify a range of addresses with the Address and SubMask fields. (Options: Any, Host, IP; Default: Any) • IP Address – Source IP address.
3 Configuring the Switch host address in the Address field, or “IP” to specify a range of addresses with the Address and SubMask fields. (Options: Any, Host, IP; Default: Any) • Source/Destination IP Address – Source or destination IP address. • Source/Destination Subnet Mask – Subnet mask for source or destination address. • Service Type – Packet priority settings based on the following criteria: - Precedence – IP precedence level. (Range: 0-7) - TOS – Type of Service level.
Access Control Lists 3 Figure 3-45 Configuring Extended IP ACLs CLI – This example adds two rules: (1) Accept any incoming packets if the source address is in subnet 10.7.1.x. For example, if the rule is matched; i.e., the rule (10.7.1.0 & 255.255.255.0) equals the masked address (10.7.1.2 & 255.255.255.0), the packet passes through. (2) Allow TCP packets from class C addresses 192.168.1.0 to any destination address when set for destination TCP port 80 (i.e., HTTP). Console(config-ext-acl)#permit 10.7.1.
3 Configuring the Switch Configuring a MAC ACL Command Attributes • Action – An ACL can contain any combination of permit or deny rules. • Source/Destination Address Type – Use “Any” to include all possible addresses, “Host” to indicate a specific MAC address, or “MAC” to specify an address range with the Address and Bitmask fields. (Options: Any, Host, MAC; Default: Any) • Source/Destination MAC Address – Source or destination MAC address.
Access Control Lists 3 Figure 3-46 Configuring MAC ACLs Binding a Port to an Access Control List After configuring the Access Control Lists (ACL), you can bind the ports that need to filter traffic to the appropriate ACLs. You can assign one IP access list to any port. Command Usage This switch supports ACLs for ingress filtering only. Command Attributes • • • • Port – Fixed port or SFP module. (Range: 1-26) IP – Specifies the IP ACL to bind to a port. MAC – Specifies the MAC ACL to bind to a port.
3 Configuring the Switch Figure 3-47 Configuring ACL Port Binding CLI – This example assigns an IP access list to port 1, and an IP access list to port 3.
3 Access Control Lists • You cannot delete an individual address from a specified range. You must delete the entire range, and reenter the addresses. • You can delete an address range just by specifying the start address, or by specifying both the start address and end address. Command Attributes • Web IP Filter – Configures IP address(es) for the web group. • SNMP IP Filter – Configures IP address(es) for the SNMP group. • • • • • Telnet IP Filter – Configures IP address(es) for the Telnet group.
3 Configuring the Switch CLI – This example allows SNMP access for a specific client. Console(config)#management snmp-client 10.1.2.3 Console(config)#end Console#show management all-client Management IP Filter HTTP-Client: Start IP address End IP address ----------------------------------------------- 4-27 SNMP-Client: Start IP address End IP address ----------------------------------------------1. 10.1.2.3 10.1.2.
Port Configuration 3 Web – Click Port, Port Information or Trunk Information. Figure 3-49 Displaying Port/Trunk Information Field Attributes (CLI) Basic Information: • Port type – Indicates the port type. (100BASE-TX, 1000BASE-T, or SFP) • MAC address – The physical layer address for this port. (To access this item on the web, see 3-14.) Configuration: • • • • • • • • Name – Interface label. Port admin – Shows if the interface is enabled or disabled (i.e., up or down).
3 Configuring the Switch • Port Security – Shows if port security is enabled or disabled. • Max MAC count – Shows the maximum number of MAC address that can be learned by a port. (0 - 1024 addresses) • Port security action – Shows the response to take when a security violation is detected. (shutdown, trap, trap-and-shutdown, or none) Current Status: • Link Status – Indicates if the link is up or down. • Port Operation Status – Provides detailed information on port state.
3 Port Configuration • Speed/Duplex – Allows you to manually set the port speed and duplex mode. (i.e., with auto-negotiation disabled) • Flow Control – Allows automatic or manual selection of flow control. • Autonegotiation (Port Capabilities) – Allows auto-negotiation to be enabled/ disabled. When auto-negotiation is enabled, you need to specify the capabilities to be advertised. When auto-negotiation is disabled, you can force the settings for speed, mode, and flow control.
3 Configuring the Switch CLI – Select the interface, and then enter the required settings. Console(config)#interface ethernet 1/13 Console(config-if)#description RD SW#13 Console(config-if)#shutdown . Console(config-if)#no shutdown Console(config-if)#no negotiation Console(config-if)#speed-duplex 100half Console(config-if)#flowcontrol .
Port Configuration 3 • The ports at both ends of a trunk must be configured in an identical manner, including communication mode (i.e., speed, duplex mode and flow control), VLAN assignments, and CoS settings. • All the ports in a trunk have to be treated as a whole when moved from/to, added or deleted from a VLAN. • STP, VLAN, and IGMP settings can only be made for the entire trunk.
3 Configuring the Switch CLI – This example creates trunk 2 with ports 1 and 2. Just connect these ports to two static trunk ports on another switch to form a trunk.
Port Configuration 3 Command Attributes • Member List (Current) – Shows configured trunks (Port). • New – Includes entry fields for creating new trunks. - Port – Port identifier. (Range: 1-26) Web – Click Port, LACP, Configuration. Select any of the switch ports from the scroll-down port list and click Add. After you have completed adding ports to the member list, click Apply.
3 Configuring the Switch CLI – The following example enables LACP for ports 1 to 6. Just connect these ports to LACP-enabled trunk ports on another switch to form a trunk. Console(config)#interface ethernet 1/1 Console(config-if)#lacp Console(config-if)#exit . . .
Port Configuration 3 - System priority is combined with the switch’s MAC address to form the LAG identifier. This identifier is used to indicate a specific LAG during LACP negotiations with other systems. • Admin Key – The LACP administration key must be set to the same value for ports that belong to the same LAG. (Range: 0-65535; Default: 1) • Port Priority – If a link goes down, LACP port priority is used to select a backup link.
3 Configuring the Switch CLI – The following example configures LACP parameters for ports 1-4. Ports 1-4 are used as active members of the LAG. Console(config)#interface ethernet 1/1 4-116 Console(config-if)#lacp actor system-priority 3 4-133 Console(config-if)#lacp actor admin-key 120 4-134 Console(config-if)#lacp actor port-priority 128 4-136 Console(config-if)#exit . . .
Port Configuration 3 Table 3-7 LACP Port Counters (Continued) Field Description Marker Unknown Pkts Number of frames received that either (1) Carry the Slow Protocols Ethernet Type value, but contain an unknown PDU, or (2) are addressed to the Slow Protocols group MAC Address, but do not carry the Slow Protocols Ethernet Type. Marker Illegal Pkts Number of frames that carry the Slow Protocols Ethernet Type value, but contain a badly formed PDU or an illegal value of Protocol Subtype.
3 Configuring the Switch Displaying LACP Settings and Status for the Local Side You can display configuration settings and the operational state for the local side of an link aggregation. Table 3-8 LACP Internal Configuration Information Field Description Oper Key Current operational value of the key for the aggregation port. Admin Key Current administrative value of the key for the aggregation port. LACPDUs Interval Number of seconds before invalidating received LACPDU information.
Port Configuration 3 Web – Click Port, LACP, Port Internal Information. Select a port channel to display the corresponding information. Figure 3-55 LACP - Port Internal Information CLI – The following example displays the LACP configuration settings and operational state for the local side of port channel 1.
3 Configuring the Switch Displaying LACP Settings and Status for the Remote Side You can display configuration settings and the operational state for the remote side of an link aggregation. Table 3-9 LACP Neighbor Configuration Information Field Description Partner Admin System ID LAG partner’s system ID assigned by the user. Partner Oper System ID LAG partner’s system ID assigned by the LACP protocol.
Port Configuration 3 CLI – The following example displays the LACP configuration settings and operational state for the remote side of port channel 1.
3 Configuring the Switch Web – Click Port, Port/Trunk Broadcast Control. Set the threshold, mark the Enabled field for the desired interface and click Apply. Figure 3-57 Port Broadcast Control CLI – Specify any interface, and then enter the threshold. The following disables broadcast storm control for port 1, and then sets broadcast suppression at 500 packets per second for port 2.
Port Configuration 3 Configuring Port Mirroring You can mirror traffic from any source port to a target port for real-time analysis. You can then attach a logic analyzer or RMON probe to the target port and study the traffic crossing the source port in a completely unobtrusive manner. Source port(s) Command Usage Single target port • Monitor port speed should match or exceed source port speed, otherwise traffic may be dropped from the monitor port.
3 Configuring the Switch Configuring Rate Limits This function allows the network manager to control the maximum rate for traffic transmitted or received on an interface. Rate limiting is configured on interfaces at the edge of a network to limit traffic into or out of the switch. Traffic that falls within the rate limit is transmitted, while packets that exceed the acceptable amount of traffic are dropped. Rate limiting can be applied to individual ports or trunks.
3 Port Configuration CLI - This example sets the rate limit level for input traffic passing through port 3. Console(config)#interface ethernet 1/3 Console(config-if)#rate-limit input 500 Console(config-if)# 4-116 4-129 Showing Port Statistics You can display standard statistics on network traffic from the Interfaces Group and Ethernet-like MIBs, as well as a detailed breakdown of traffic based on the RMON MIB.
3 Configuring the Switch Table 3-10 Port Statistics (Continued) Parameter Description Transmit Multicast Packets The total number of packets that higher-level protocols requested be transmitted, and which were addressed to a multicast address at this sub-layer, including those that were discarded or not sent.
3 Port Configuration Table 3-10 Port Statistics (Continued) Parameter Description RMON Statistics Drop Events The total number of events in which packets were dropped due to lack of resources. Jabbers The total number of frames received that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either an FCS or alignment error. Received Bytes Total number of bytes of data received on the network.
3 Configuring the Switch Web – Click Port, Port Statistics. Select the required interface, and click Query. You can also use the Refresh button at the bottom of the page to update the screen.
3 Address Table Settings CLI – This example shows statistics for port 13.
3 Configuring the Switch Web – Click Address Table, Static Addresses. Specify the interface, the MAC address and VLAN, then click Add Static Address. Figure 3-61 Configuring a Static Address Table CLI – This example adds an address to the static address table, but sets it to be deleted when the switch is reset.
Address Table Settings 3 Web – Click Address Table, Dynamic Addresses. Specify the search type (i.e., mark the Interface, MAC Address, or VLAN checkbox), select the method of sorting the displayed addresses, and then click Query. Figure 3-62 Configuring a Dynamic Address Table CLI – This example also displays the address table entries for port 1.
3 Configuring the Switch Changing the Aging Time You can set the aging time for entries in the dynamic address table. Command Attributes • Aging Status – Enables/disables the function. • Aging Time – The time after which a learned entry is discarded. (Range: 10-630 seconds; Default: 300 seconds) Web – Click Address Table, Address Aging. Specify the new aging time, click Apply. Figure 3-63 Setting the Address Aging Time CLI – This example sets the aging time to 300 seconds.
3 Spanning Tree Algorithm Configuration disables all other ports. Network packets are therefore only forwarded between root ports and designated ports, eliminating any possible network loops. Once a stable network topology has been established, all bridges listen for Hello BPDUs (Bridge Protocol Data Units) transmitted from the Root Bridge. If a bridge does not get a Hello BPDU after a predefined interval (Maximum Age), the bridge assumes that the link to the Root Bridge is down.
3 Configuring the Switch An MST Region consists of a group of interconnected bridges that have the same MST Configuration Identifiers (including the Region Name, Revision Level and Configuration Digest-V see 3-116). An MST Region may contain multiple MSTP Instances. An Internal Spanning Tree (IST) is used to connect all the MSTP switches within an MST region.
3 Spanning Tree Algorithm Configuration Displaying Global Settings You can display a summary of the current bridge STA information that applies to the entire switch using the STA Information screen. Field Attributes • Spanning Tree State – Shows if the switch is enabled to participate in an STA-compliant network. • Bridge ID – A unique identifier for this bridge, consisting of the bridge priority and MAC address (where the address is taken from the switch system).
3 • • • • • Configuring the Switch However, if all devices have the same priority, the device with the lowest MAC address will then become the root device. Root Hello Time – Interval (in seconds) at which this device transmits a configuration message. Root Maximum Age – The maximum time (in seconds) this device can wait without receiving a configuration message before attempting to reconfigure. All device ports (except for designated ports) should receive configuration messages at regular intervals.
Spanning Tree Algorithm Configuration 3 CLI – This command displays global STA settings, followed by settings for each port. Console#show spanning-tree Spanning-tree information --------------------------------------------------------------Spanning tree mode: RSTP Spanning tree enabled/disabled: enabled Priority: 32768 Bridge Hello Time (sec.): 2 Bridge Max Age (sec.): 20 Bridge Forward Delay (sec.): 15 Root Hello Time (sec.): 2 Root Max Age (sec.): 20 Root Forward Delay (sec.): 15 Designated Root: 32768.
3 Configuring the Switch - To allow multiple spanning trees to operate over the network, you must configure a related set of bridges with the same MSTP configuration, allowing them to participate in a specific set of spanning tree instances. - A spanning tree instance can exist only on bridges that have compatible VLAN instance assignments. - Be careful when switching between spanning tree modes.
Spanning Tree Algorithm Configuration 3 • Forward Delay – The maximum time (in seconds) this device will wait before changing states (i.e., discarding to learning to forwarding). This delay is required because every device must receive information about topology changes before it starts to forward frames. In addition, each port needs time to listen for conflicting information that would make it return to a discarding state; otherwise, temporary data loops might result.
3 Configuring the Switch Web – Click Spanning Tree, STA, Configuration. Modify the required attributes, and click Apply. Figure 3-65 Configuring Spanning Tree CLI – This example enables Spanning Tree Protocol, sets the mode to RSTP, and then configures the STA and RSTP parameters.
3 Spanning Tree Algorithm Configuration Displaying Interface Settings The STA Port Information and STA Trunk Information pages display the current status of ports and trunks in the Spanning Tree. Field Attributes • Spanning Tree – Shows if STA has been enabled on this interface. • STA Status – Displays current state of this port within the Spanning Tree: • Discarding - Port receives STA configuration messages, but does not forward packets.
3 Configuring the Switch • Trunk Member – Indicates if a port is a member of a trunk. (STA Port Information only) These additional parameters are only displayed for the CLI: • Admin status – Shows if this interface is enabled. • Path cost – This parameter is used by the STA to determine the best path between devices. Therefore, lower values should be assigned to ports attached to faster media, and higher values assigned to ports with slower media. (Path cost takes precedence over port priority.
Spanning Tree Algorithm Configuration 3 the amount of frame flooding required to rebuild address tables during reconfiguration events, does not cause the spanning tree to reconfigure when the interface changes state, and also overcomes other STA-related timeout problems. However, remember that Edge Port should only be enabled for ports connected to an end-node device. • Admin Link Type – The link type attached to this interface. - Point-to-Point – A connection to exactly one other bridge.
3 Configuring the Switch Configuring Interface Settings You can configure RSTP and MSTP attributes for specific interfaces, including port priority, path cost, link type, and edge port. You may use a different priority or path cost for ports of the same media type to indicate the preferred path, link type to indicate a point-to-point connection or shared-media connection, and edge port to indicate if the attached device can support fast forwarding.
3 Spanning Tree Algorithm Configuration • Admin Link Type – The link type attached to this interface. - Point-to-Point – A connection to exactly one other bridge. - Shared – A connection to two or more bridges. - Auto – The switch automatically determines if the interface is attached to a point-to-point link or to shared media. (This is the default setting.
3 Configuring the Switch Configuring Multiple Spanning Trees MSTP generates a unique spanning tree for each instance. This provides multiple pathways across the network, thereby balancing the traffic load, preventing wide-scale disruption when a bridge node in a single instance fails, and allowing for faster convergence of a new topology for the failed instance. By default all VLANs are assigned to the Internal Spanning Tree (MST Instance 0) that connects all bridges and LANs within the MST region.
Spanning Tree Algorithm Configuration 3 Web – Click Spanning Tree, MSTP, VLAN Configuration. Select an instance identifier from the list, set the instance priority, and click Apply. To add the VLAN members to an MSTI instance, enter the instance identifier, the VLAN identifier, and click Add. Figure 3-68 Configuring Multiple Spanning Trees CLI – This example sets the priority for MSTI 1, and adds VLANs 1-5 to this MSTI.
3 Configuring the Switch CLI – This example sets STA attributes for port 1, , followed by settings for each port. Console#show spanning-tree mst 2 Spanning-tree information --------------------------------------------------------------Spanning tree mode :MSTP Spanning tree enable/disable :enable Instance :2 Vlans configuration :2 Priority :4096 Bridge Hello Time (sec.) :2 Bridge Max Age (sec.) :20 Bridge Forward Delay (sec.) :15 Root Hello Time (sec.) :2 Root Max Age (sec.) :20 Root Forward Delay (sec.
3 Spanning Tree Algorithm Configuration Web – Click Spanning Tree, MSTP, Port or Trunk Information. Select the required MST instance to display the current spanning tree values.
3 Configuring the Switch CLI – This displays STA settings for instance 0, followed by settings for each port. The settings for instance 0 are global settings that apply to the IST, the settings for other instances only apply to the local spanning tree.
Spanning Tree Algorithm Configuration 3 - Discarding – Port receives STA configuration messages, but does not forward packets. - Learning – Port has transmitted configuration messages for an interval set by the Forward Delay parameter without receiving contradictory information. Port address table is cleared, and the port begins learning addresses. - Forwarding – Port forwards packets, and continues learning addresses. • Trunk – Indicates if a port is a member of a trunk.
3 Configuring the Switch Web – Click Spanning Tree, MSTP, Port Configuration or Trunk Configuration. Enter the priority and path cost for an interface, and click Apply. Figure 3-70 Displaying MSTP Interface Settings CLI – This example sets the MSTP attributes for port 4. Console(config)#interface ethernet 1/4 Console(config-if)#spanning-tree mst port-priority 0 Console(config-if)#spanning-tree mst cost 50 Console(config-if) VLAN Configuration IEEE 802.
3 VLAN Configuration This switch supports the following VLAN features: • Up to 255 VLANs based on the IEEE 802.
3 Configuring the Switch VLAN form a broadcast domain that is separate from other VLANs configured on the switch. Packets are forwarded only between ports that are designated for the same VLAN. Untagged VLANs can be used to manually isolate user groups or subnets. However, you should use IEEE 802.3 tagged VLANs with GVRP whenever possible to fully automate VLAN registration.
3 VLAN Configuration Forwarding Tagged/Untagged Frames If you want to create a small port-based VLAN for devices attached directly to a single switch, you can assign ports to the same untagged VLAN. However, to participate in a VLAN group that crosses several switches, you should create a VLAN for that group and enable tagging on all ports. Ports can be assigned to multiple tagged VLANs, but are only allowed one untagged VLAN. Each port on the switch is capable of passing tagged or untagged frames.
3 Configuring the Switch Displaying Basic VLAN Information The VLAN Basic Information page displays basic information on the VLAN type supported by the switch. Field Attributes • VLAN Version Number8 – The VLAN version used by this switch as specified in the IEEE 802.1Q standard. • Maximum VLAN ID – Maximum VLAN ID recognized by this switch. • Maximum Number of Supported VLANs – Maximum number of VLANs that can be configured on this switch. Web – Click VLAN, 802.1Q VLAN, Basic Information.
VLAN Configuration 3 • Status – Shows how this VLAN was added to the switch. - Dynamic GVRP: Automatically learned via GVRP. - Permanent: Added as a static entry. • Egress Ports – Shows all the VLAN port members. • Untagged Ports – Shows the untagged VLAN port members. Web – Click VLAN, 802.1Q VLAN, Current Table. Select any ID from the scroll-down list. Figure 3-73 Displaying Current VLANs Command Attributes (CLI) • VLAN – ID of configured VLAN (1-4094, no leading zeroes).
3 Configuring the Switch CLI – Current VLAN information can be displayed with the following command.
3 VLAN Configuration Web – Click VLAN, 802.1Q VLAN, Static List. To create a new VLAN, enter the VLAN ID and VLAN name, mark the Enable checkbox to activate the VLAN, and then click Add. Figure 3-74 Configuring a VLAN Static List CLI – This example creates a new VLAN.
3 Configuring the Switch 2. VLAN 1 is the default untagged VLAN containing all ports on the switch, and can only be modified by first reassigning the default port VLAN ID as described under “Configuring VLAN Behavior for Interfaces” on page 3-132. Command Attributes • VLAN – ID of configured VLAN (1-4094). • Name – Name of the VLAN (1 to 32 characters). • Status – Enables or disables the specified VLAN. - Enable: VLAN is operational. - Disable: VLAN is suspended; i.e., does not pass packets.
3 VLAN Configuration CLI – The following example adds tagged and untagged ports to VLAN 2.
3 Configuring the Switch Configuring VLAN Behavior for Interfaces You can configure VLAN behavior for specific interfaces, including the default VLAN identifier (PVID), accepted frame types, ingress filtering, GVRP status, and GARP timers. Command Usage • GVRP – GARP VLAN Registration Protocol defines a way for switches to exchange VLAN information in order to automatically register VLAN members on interfaces across the network.
Configuring IEEE 802.1Q Tunneling 3 Web – Click VLAN, 802.1Q VLAN, Port Configuration or Trunk Configuration. Fill in the required settings for each interface, click Apply. Figure 3-77 Configuring VLANs per Port CLI – This example sets port 3 to accept only tagged frames, assigns PVID 3 as the native VLAN ID, and then sets the switchport mode to hybrid.
3 Configuring the Switch A port configured to support QinQ tunneling must be set to tunnel port mode. The Service Provider VLAN (SPVLAN) ID for the specific customer must be assigned to the QinQ tunnel access port on the edge switch where the customer traffic enters the service provider’s network. Each customer requires a separate SPVLAN, but this VLAN supports all of the customer's internal VLANs.
Configuring IEEE 802.1Q Tunneling 3 tag if it is a tagged or priority tagged packet. 2. After successful source and destination lookup, the ingress process sends the packet to the switching process with two tags. If the incoming packet is untagged, the outer tag is an SPVLAN tag, and the inner tag is a dummy tag (8100 0000). If the incoming packet is tagged, the outer tag is an SPVLAN tag, and the inner tag is a CVLAN tag. 3.
3 Configuring the Switch 6. After packet classification, the packet is written to memory for processing as a single-tagged or double-tagged packet. 7. The switch sends the packet to the proper egress port. 8. If the egress port is an untagged member of the SPVLAN, the outer tag will be stripped. If it is a tagged member, the outgoing packet will have two tags. Configuration Limitations for QinQ • The native VLAN of uplink ports should not be used as the SPVLAN.
3 Configuring IEEE 802.1Q Tunneling Enabling QinQ Tunneling on the Switch The switch can be configured to operate in normal VLAN mode or IEEE 802.1Q (QinQ) tunneling mode which is used for passing Layer 2 traffic across a service provider’s metropolitan area network. Command Attributes • 802.1Q Tunnel – Sets the switch to QinQ mode, and allows the QinQ tunnel port to be configured. The default is for the switch to function in normal mode. • 802.
3 Configuring the Switch CLI – This example sets the switch to operate in QinQ mode. Console(config)#dot1q-tunnel system-tunnel-control Console(config)#exit Console#show dot1q-tunnel 52-14 52-16 Current double-tagged status of the system is Enabled The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. . . The dot1q-tunnel 0x8100.
Configuring IEEE 802.1Q Tunneling 3 - 802.1Q Tunnel Uplink – Configures IEEE 802.1Q tunneling (QinQ) for an uplink port to another device within the service provider network. Web – Click VLAN, 802.1Q VLAN, Tunnel Configuration or Tunnel Trunk Configuration. Set the mode for a tunnel access port to 802.1Q Tunnel and a tunnel uplink port to 802.1Q Tunnel Uplink. Set the TPID of the ports if the client is using a non-standard ethertype to identify 802.1Q tagged frames. Click Apply.
3 Configuring the Switch CLI – This example sets port 1 to tunnel access mode, indicates that the TPID used for 802.1Q tagged frames is 9100 hexadecimal, and sets port 2 to tunnel uplink mode.
3 Configuring IEEE 802.1Q Tunneling Configuring Private VLANs Private VLANs provide port-based security and isolation between ports within the assigned VLAN. Data traffic on downlink ports can only be forwarded to, and from, uplink ports. (Note that private VLANs and normal VLANs can exist simultaneously within the same switch.) Enabling Private VLANs Use the Private VLAN Status page to enable/disable the Private VLAN function. Web – Click VLAN, Private VLAN, Status.
3 Configuring the Switch Configuring Uplink and Downlink Ports Use the Private VLAN Link Status page to set ports as downlink or uplink ports. Ports designated as downlink ports can not communicate with any other ports on the switch except for the uplink ports. Uplink ports can communicate with any other ports on the switch and with any designated downlink ports. Web – Click VLAN, Private VLAN, Link Status. Mark the ports that will serve as uplinks and downlinks for the private VLAN, then click Apply.
Configuring IEEE 802.1Q Tunneling 3 • Protocol Type – The only option for the LLC Other frame type is IPX Raw. The options for all other frames types include IP, ARP, or RARP. Web – Click VLAN, Protocol VLAN, Configuration. Figure 3-82 Protocol VLAN Configuration Configuring Protocol VLAN Interfaces Use the Protocol VLAN Port Configuration menu to set the protocol VLAN settings per port. Command Attributes • Interface – Port or Trunk indentifier.
3 Configuring the Switch Class of Service Configuration Class of Service (CoS) allows you to specify which data packets have greater precedence when traffic is buffered in the switch due to congestion. This switch supports CoS with four priority queues for each port. Data packets in a port’s high-priority queue will be transmitted before those in the lower-priority queues. You can set the default priority for each interface, and configure the mapping of frame priority tags to the switch’s priority queues.
3 Class of Service Configuration Web – Click Priority, Default Port Priority or Default Trunk Priority. Modify the default priority for any interface, then click Apply. Figure 3-84 Port Priority Configuration CLI – This example assigns a default priority of 5 to port 3.
3 Configuring the Switch The priority levels recommended in the IEEE 802.1p standard for various network applications are shown in the following table. However, you can map the priority levels to the switch’s output queues in any way that benefits application traffic for your own network.
Class of Service Configuration 3 CLI – The following example shows how to change the CoS assignments. Console(config)#interface ethernet 1/1 Console(config-if)#queue cos-map 0 0 Console(config-if)#queue cos-map 1 1 Console(config-if)#queue cos-map 2 2 Console(config-if)#end Console#show queue cos-map ethernet 1/1 Information of Eth 1/1 CoS Value: 0 1 2 3 4 5 6 7 Priority Queue: 0 1 2 1 2 2 3 3 Console# 4-116 4-187 4-189 Enabling CoS Enable or disable Class of Service (CoS).
3 Configuring the Switch Web – Click Priority, Queue Mode. Select Strict or WRR, then click Apply. Figure 3-87 Queue Mode CLI – The following sets the queue mode to WRR priority service mode. Console(config)#queue mode wrr Console(config)#exit Console#show queue mode Queue mode: wrr Console# 4-185 4-188 Setting the Service Weight for Traffic Classes This switch uses the Weighted Round Robin (WRR) algorithm to determine the frequency at which it services each priority queue.
3 Class of Service Configuration CLI – The following example shows how to display the WRR weights assigned to each of the priority queues. Console#show queue bandwidth Queue ID Weight -------- -----0 1 1 2 2 4 3 8 Console 4-188 Layer 3/4 Priority Settings Mapping Layer 3/4 Priorities to CoS Values This switch supports several common methods of prioritizing layer 3/4 traffic to meet application requirements.
3 Configuring the Switch Web – Click Priority, IP Precedence/DSCP Priority Status. Select Disabled, IP Precedence or IP DSCP from the scroll-down menu, then click Apply. Figure 3-89 IP Precedence/DSCP Priority Status CLI – The following example enables IP Precedence service on the switch.
3 Class of Service Configuration Web – Click Priority, IP Precedence Priority. Select an entry from the IP Precedence Priority Table, enter a value in the Class of Service Value field, and then click Apply. Figure 3-90 Mapping IP Precedence Priority Values CLI – The following example globally enables IP Precedence service on the switch, maps IP Precedence value 1 to CoS value 0 (on port 1), and then displays the IP Precedence settings.
3 Configuring the Switch Mapping DSCP Priority The DSCP is six bits wide, allowing coding for up to 64 different forwarding behaviors. The DSCP retains backward compatibility with the three precedence bits so that non-DSCP compliant will not conflict with the DSCP mapping. Based on network policies, different kinds of traffic can be marked for different kinds of forwarding. The DSCP default values are defined in the following table.
Class of Service Configuration 3 CLI – The following example globally enables DSCP Priority service on the switch, maps DSCP value 0 to CoS value 1 (on port 1), and then displays the DSCP Priority settings.
3 Configuring the Switch Click Priority, IP Port Priority. Enter the port number for a network application in the IP Port Number box and the new CoS value in the Class of Service box, and then click Apply. Figure 3-93 IP Port Priority CLI* – The following example globally enables IP Port Priority service on the switch, maps HTTP traffic on port 5 to CoS value 0, and then displays all the IP Port Priority settings for that port.
3 Quality of Service All switches or routers that access the Internet rely on class information to provide the same forwarding treatment to packets in the same class. Class information can be assigned by end hosts, or switches or routers along the path. Priority can then be assigned based on a general policy, or a detailed examination of the packet. However, note that detailed examination of packets should take place close to the network edge so that core switches and routers are not overloaded.
3 Configuring the Switch based on an access list, a DSCP or IP Precedence value, or a VLAN, and click the Add button next to the field for the selected traffic criteria. You can specify up to 16 items to match when assigning ingress traffic to a class map. • The class map is used with a policy map (page 3-158) to create a service policy (page 3-161) for a specific interface that defines packet classification, service tagging, and bandwidth policing.
Quality of Service 3 Web – Click QoS, DiffServ, then click Add Class to create a new class, or Edit Rules to change the rules of an existing class. Figure 3-94 Configuring Class Maps CLI - This example creates a class map call “rd-class,” and sets it to match packets marked for DSCP service value 3.
3 Configuring the Switch Creating QoS Policies This function creates a policy map that can be attached to multiple interfaces. Command Usage • To configure a Policy Map, follow these steps: - Create a Class Map as described on page 3-155. - Open the Policy Map page, and click Add Policy. - When the Policy Configuration page opens, fill in the “Policy Name” field, and click Add. - When the Policy Rule Settings page opens, select a class name from the scroll-down list (Class Name field).
Quality of Service 3 Policy Rule Settings - Class Settings • Class Name – Name of class map. • Action – Shows the service provided to ingress traffic by setting a CoS, DSCP, or IP Precedence value in a matching packet (as specified in Match Class Settings on 3-155). • Meter – The maximum throughput and burst rate. - Rate (kbps) – Rate in kilobits per second. - Burst (byte) – Burst in bytes.
3 Configuring the Switch Web – Click QoS, DiffServ, Policy Map to display the list of existing policy maps. To add a new policy map click Add Policy. To configure the policy rule settings click Edit Classes. Figure 3-95 Configuring Policy Maps CLI – This example creates a policy map called “rd-policy,” sets the average bandwidth the 1 Mbps, the burst rate to 1522 bps, and the response to reduce the DSCP value for violating packets to 0.
Quality of Service 3 Attaching a Policy Map to Ingress Queues This function binds a policy map to the ingress queue of a particular interface. Command Usage • You must first define a class map, then define a policy map, and finally bind the service policy to the required interface. • You can only bind one policy map to an interface. • The current firmware does not allow you to bind a policy map to an egress queue. Command Attributes • • • • Ports – Specifies a port.
3 Configuring the Switch Multicast Filtering Multicasting is used to support real-time applications such as videoconferencing or streaming audio. A multicast server does not have to establish a separate connection with each client. It merely broadcasts its service to the network, and any hosts that want to receive the multicast register with their local multicast switch/ router.
Multicast Filtering 3 Configuring IGMP Snooping and Query Parameters You can configure the switch to forward multicast traffic intelligently. Based on the IGMP query and report messages, the switch forwards traffic only to the ports that request multicast traffic. This prevents the switch from broadcasting the traffic to all ports and possibly disrupting network performance.
3 Configuring the Switch Web – Click IGMP Snooping, IGMP Configuration. Adjust the IGMP settings as required, and then click Apply. (The default settings are shown below.) Figure 3-97 IGMP Configuration CLI – This example modifies the settings for multicast filtering, and then displays the current status.
3 Multicast Filtering Command Attributes • VLAN ID – ID of configured VLAN (1-4094). • Immediate Leave – Enable or disable IGMP immediate leave for the selected VLAN. Web – Click IGMP Snooping, IGMP Immediate Leave. Figure 3-98 IGMP Immediate Leave CLI – This example enables IGMP immediate leave for VLAN 1 and then displays the current IGMP snooping status.
3 Configuring the Switch Web – Click IGMP Snooping, Multicast Router Port Information. Select the required VLAN ID from the scroll-down list to display the associated multicast routers. Figure 3-99 Displaying Multicast Router Port Information CLI – This example shows that Port 11 has been statically configured as a port attached to a multicast router.
3 Multicast Filtering Web – Click IGMP Snooping, Static Multicast Router Port Configuration. Specify the interfaces attached to a multicast router, indicate the VLAN which will forward all the corresponding multicast traffic, and then click Add. After you have finished adding interfaces to the list, click Apply. Figure 3-100 Static Multicast Router Port Configuration CLI – This example configures port 11 as a multicast router port within VLAN 1.
3 Configuring the Switch Web – Click IGMP Snooping, IP Multicast Registration Table. Select a VLAN ID and the IP address for a multicast service from the scroll-down lists. The switch will display all the interfaces that are propagating this multicast service. Figure 3-101 IP Multicast Registration Table CLI – This example displays all the known multicast services supported on VLAN 1, along with the ports propagating the corresponding services.
Multicast Filtering 3 Web – Click IGMP Snooping, IGMP Member Port Table. Specify the interface attached to a multicast service (via an IGMP-enabled switch or multicast router), indicate the VLAN that will propagate the multicast service, specify the multicast IP address, and click Add. After you have completed adding ports to the member list, click Apply.
3 Configuring the Switch switch randomly removes an existing group and replaces it with the new multicast group. Note: IGMP filtering and throttling only applies to dynamically learned multicast groups, it does not apply to statically configured groups. Enabling IGMP Filtering and Throttling To implement IGMP filtering and throttling on the switch, you must first enable the feature globally and create IGMP profile numbers.
Multicast Filtering 3 Configuring IGMP Filtering and Throttling for Interfaces Once you have configured IGMP profiles, you can then assign them to interfaces on the switch. Also, you can set the IGMP throttling number to limit the number of multicast groups an interface can join at the same time. Command Usage • Only one profile can be assigned to an interface. • An IGMP profile or throttling setting can be applied to a trunk interface.
3 Configuring the Switch Web – Click IGMP Snooping, IGMP Filter/Throttling Port Configuration or IGMP Filter/Throttling Trunk Configuration. Select a profile to assign to an interface, then set the throttling number and action. Click Apply. Figure 3-104 IGMP Filter and Throttling Port Configuration CLI – This example assigns IGMP profile number 19 to port 1, and then sets the throttling number and action. The current IGMP filtering and throttling settings for the interface are then displayed.
Multicast Filtering 3 deny, IGMP join reports are only processed when a multicast group is not in the controlled range. Command Attributes • Profile ID – Selects an existing profile number to configure. After selecting an ID number, click the Query button to display the current configuration. • Access Mode – Sets the access mode of the profile; either permit or deny. (Default: Deny) • New Multicast Address Range List – Specifies multicast groups to include in the profile.
Multicast Filtering 3 General Configuration Guidelines for MVR 1. Enable MVR globally on the switch, select the MVR VLAN, and add the multicast groups that will stream traffic to attached hosts (see “Configuring Global MVR Settings” on page 3-175). 2. Set the interfaces that will join the MVR as source ports or receiver ports (see “Configuring MVR Interface Status” on page 3-179). 3. Enable IGMP Snooping to a allow a subscriber to dynamically join or leave an MVR group (see 3-163).
3 Configuring the Switch CLI – This example configures profile number 19 by setting the access mode to “permit” and then specifying a range of multicast groups that a user can join. The current profile configuration is then displayed. Console(config)#ip igmp profile 19 Console(config-igmp-profile)#permit Console(config-igmp-profile)#range 239.1.1.1 Console(config-igmp-profile)#range 239.2.3.1 239.2.3.100 Console(config-igmp-profile)#end Console#show ip igmp profile 19 IGMP Profile 19 permit range 239.1.1.
3 Configuring the Switch Web – Click MVR, Configuration. Enable MVR globally on the switch, select the MVR VLAN, add the multicast groups that will stream traffic to attached hosts, and then click Apply. Figure 3-106 MVR Global Configuration CLI – This example first enables IGMP snooping, enables MVR globally, and then configures a range of MVR group addresses. Console(config)#ip igmp snooping Console(config)#mvr Console(config)#mvr group 228.1.23.
Multicast Filtering 3 Web – Click MVR, Port or Trunk Information. Figure 3-107 MVR Port Information CLI – This example shows information about interfaces attached to the MVR VLAN.
3 Configuring the Switch Displaying Port Members of Multicast Groups You can display the multicast groups assigned to the MVR VLAN either through IGMP snooping or static configuration. Field Attributes • Group IP – Multicast groups assigned to the MVR VLAN. • Group Port List – Shows the interfaces with subscribers for multicast services provided through the MVR VLAN. Web – Click MVR, Group IP Information.
3 Multicast Filtering Configuring MVR Interface Status Each interface that participates in the MVR VLAN must be configured as an MVR source port or receiver port. If only one subscriber attached to an interface is receiving multicast services, you can enable the immediate leave function. Command Usage • One or more interfaces may be configured as MVR source ports. • MVR receiver ports cannot be members of a trunk.
3 Configuring the Switch Web – Click MVR, Port or Trunk Configuration. Figure 3-109 MVR Port Configuration CLI – This example configures an MVR source port and receiver port, and then enables immediate leave on the receiver port.
3 Configuring Domain Name Service Web – Click MVR, Group Member Configuration. Select a port or trunk from the “Interface” field, and click Query to display the assigned multicast groups. Select a multicast address from the displayed lists, and click the Add or Remove button to modify the Member list. Figure 3-110 MVR Group Member Configuration CLI – This example statically assigns a multicast group to a receiver port. Console(config)#interface ethernet 1/2 Console(config-if)#mvr group 228.1.23.
3 Configuring the Switch • When an incomplete host name is received by the DNS service on this switch and a domain name list has been specified, the switch will work through the domain list, appending each domain name in the list to the host name, and checking with the specified name servers for a match. • When more than one name server is specified, the servers are queried in the specified sequence until a response is received, or the end of the list is reached with no response.
3 Configuring Domain Name Service CLI - This example sets a default domain name and a domain list. However, remember that if a domain list is specified, the default domain name is not used. Console(config)#ip domain-name sample.com Console(config)#ip domain-list sample.com.uk Console(config)#ip domain-list sample.com.jp Console(config)#ip name-server 192.168.1.55 10.1.0.55 Console(config)#ip domain-lookup Console#show dns Domain Lookup Status: DNS enabled Default Domain Name: .sample.
3 Configuring the Switch Web – Select DNS, Static Host Table. Enter a host name and one or more corresponding addresses, then click Apply. Figure 3-112 DNS Static Host Table CLI - This example maps two address to a host name, and then configures an alias host name for the same addresses. Console(config)#ip host rd5 192.168.1.55 10.1.0.55 Console(config)#ip host rd6 10.1.0.55 Console#show hosts Hostname rd5 Inet address 10.1.0.55 192.168.1.55 Alias 1.
Configuring Domain Name Service 3 Displaying the DNS Cache You can display entries in the DNS cache that have been learned via the designated name servers. Field Attributes • No – The entry number for each resource record. • Flag – The flag is always “4” indicating a cache entry and therefore unreliable.
3 Configuring the Switch CLI - This example displays all the resource records learned from the designated name servers. Console#show dns cache NO FLAG TYPE 0 4 CNAME 1 4 CNAME 2 4 CNAME 3 4 CNAME 4 4 CNAME 5 4 ALIAS 6 4 CNAME 7 4 ALIAS 8 4 CNAME 9 4 ALIAS 10 4 CNAME Console# IP 207.46.134.222 207.46.134.190 207.46.134.155 207.46.249.222 207.46.249.27 POINTER TO:4 207.46.68.27 POINTER TO:6 65.54.131.192 POINTER TO:8 165.193.72.190 TTL 51 51 51 51 51 51 71964 71964 605 605 87 4-238 DOMAIN www.microsoft.
DHCP Snooping 3 the packet will only be forwarded if the client’s hardware address stored in the DHCP packet is the same as the source MAC address in the Ethernet header. • If the DHCP packet is not a recognizable type, it is dropped. • If a DHCP packet from a client passes the filtering criteria above, it will only be forwarded to trusted ports in the same VLAN. • If a DHCP packet is from server is received on a trusted port, it will be forwarded to both trusted and untrusted ports in the same VLAN.
3 Configuring the Switch DHCP Snooping VLAN Configuration Enables DHCP snooping on the specified VLAN. Command Attributes • VLAN ID – ID of a configured VLAN. (Range: 1-4094) • DHCP Snooping Status – Enables or disables DHCP snooping for the selected VLAN. When DHCP snooping is enabled globally on the switch, and enabled on the specified VLAN, DHCP packet filtering will be performed on any untrusted ports within the VLAN. Web – Click DHCP Snooping, VLAN Configuration.
DHCP Snooping 3 Command Attributes • DHCP Snooping Information Option Status – Enables or disables DHCP Option 82 information relay. • DHCP Snooping Information Option Policy – Sets the DHCP snooping information option policy for DHCP client packets that include Option 82 information. • Replace – Overwrites the DHCP client packet information with the switch’s relay information. • Keep – Retains the client’s DHCP information.
3 Configuring the Switch Web – Click DHCP Snooping, Information Option Configuration. Figure 3-117 DHCP Snooping Port Configuration CLI – This example shows how to enable the DHCP Snooping Trust Status for ports. Console(config)#interface ethernet 1/5 Console(config-if)#ip dhcp snooping trust Console(config-if)# 4-234 DHCP Snooping Binding Information Displays the DHCP snooping binding information. Command Attributes • • • • • • • • No. – Entry number for DHCP snooping binding information.
3 IP Source Guard Web – Click DHCP Snooping, DHCP Snooping Binding Information. Figure 3-118 DHCP Snooping Binding Information CLI – This example shows how to display the DHCP Snooping binding table entries. Console#show ip dhcp snooping binding 4-237 MacAddress IpAddress Lease(sec) Type VLAN Interface ----------------- --------------- ---------- -------------------- ---- -11-22-33-44-55-66 192.168.0.
3 Configuring the Switch Command Attributes • Filter Type – Configures the switch to filter inbound traffic based source IP address, or source IP address and corresponding MAC address. (Default: None) • None – Disables IP source guard filtering on the port. • SIP – Enables traffic filtering based on IP addresses stored in the binding table. • SIP-MAC – Enables traffic filtering based on IP addresses and corresponding MAC addresses stored in the binding table.
3 IP Source Guard Command Attributes • • • • • Static Binding Table Counts – The total number of static entries in the table. Port – Switch port number. (Range: 1-26) VLAN ID – ID of a configured VLAN (Range: 1-4094) MAC Address – A valid unicast MAC address. IP Address – A valid unicast IP address, including classful types A, B or C. Web – Click IP Source Guard, Static Configuration.
3 Configuring the Switch Web – Click IP Source Guard, Dynamic Information. Figure 3-121 Dynamic IP Source Guard Binding Information CLI – This example shows how to configure a static source-guard binding on port 5. Console#show ip source-guard binding 4-230 MacAddress IpAddress Lease(sec) Type VLAN Interface ----------------- --------------- ---------- -------------------- -------11-22-33-44-55-66 192.168.0.
3 Switch Clustering Once a switch has been configured to be a cluster Commander, it automatically discovers other cluster-enabled switches in the network. These “Candidate” switches only become cluster Members when manually selected by the administrator through the management station. After the Commander and Members have been configured, any switch in the cluster can be managed from the web interface by choosing the Member ID from the Cluster drop-down menu.
3 Configuring the Switch Web – Click Cluster, Configuration. Figure 3-123 Cluster Configuration CLI – This example first enables clustering on the switch, sets the switch as the cluster Commander, and then configures the cluster IP pool. Console(config)#cluster Console(config)#cluster commander Console(config)#cluster ip-pool 10.2.3.4 Console(config)# 4-238 4-239 4-239 Cluster Member Configuration Adds Candidate switches to the cluster as Members.
3 Switch Clustering Web – Click Cluster, Member Configuration. Figure 3-124 Cluster Member Configuration CLI – This example creates a new cluster Member by specifying the Candidate switch MAC address and setting a Member ID. Console(config)#cluster member mac-address 00-12-34-56-78-9a id 5 Console(config)# 4-240 Cluster Member Information Displays current cluster Member switch information. Command Attributes • • • • • Member ID – The ID number of the Member switch.
3 Configuring the Switch CLI – This example shows information about cluster Member switches. Vty-0#sh cluster members Cluster Members: ID: 1 Role: Active member IP Address: 10.254.254.2 MAC Address: 00-12-cf-23-49-c0 Description: TL-SG5426 Vty-0# 4-241 Cluster Candidate Information Displays information about discovered switches in the network that are already cluster Members or are available to become cluster Members.
Chapter 4: Command Line Interface This chapter describes how to use the Command Line Interface (CLI). Using the Command Line Interface Accessing the CLI When accessing the management interface for the switch over a direct connection to the server’s console port, or via a Telnet connection, the switch can be managed by entering command keywords and parameters at the prompt. Using the switch's command-line interface (CLI) is very similar to entering commands on a UNIX system.
4 Command Line Interface Telnet Connection Telnet operates over the IP transport protocol. In this environment, your management station and any network device you want to manage over the network must have a valid IP address. Valid IP addresses consist of four numbers, 0 to 255, separated by periods. Each address consists of a network portion and host portion. For example, the IP address assigned to this switch, 10.1.0.1, with subnet mask 255.255.255.0, consists of a network portion (10.1.
Entering Commands 4 Entering Commands This section describes how to enter CLI commands. Keywords and Arguments A CLI command is a series of keywords and arguments. Keywords identify a command, and arguments specify configuration parameters. For example, in the command “show interfaces status ethernet 1/5,” show interfaces and status are keywords, ethernet is an argument that specifies the interface type, and 1/5 specifies the unit/port.
4 Command Line Interface Showing Commands If you enter a “?” at the command prompt, the system will display the first level of keywords for the current command class (Normal Exec or Privileged Exec) or configuration class (Global, ACL, Interface, Line or VLAN Database). You can also display a list of valid keywords for a specific command.
Entering Commands 4 The command “show interfaces ?” will display the following information: Console#show interfaces ? counters Interface counters information protocol-vlan Protocol-VLAN information status Interface status information switchport Interface switchport information Console#show interfaces Partial Keyword Lookup If you terminate a partial keyword with a question mark, alternatives that match the initial letters are provided. (Remember not to leave a space between the command and question mark.
4 Command Line Interface Table 4-1 Command Modes Class Mode Exec Normal Privileged Configuration Global* Access Control List Class Map Interface Line Multiple Spanning Tree Policy Map VLAN Database * You must be in Privileged Exec mode to access the Global configuration mode. You must be in Global Configuration mode to access any of the other configuration modes.
4 Entering Commands Configuration Commands Configuration commands are privileged level commands used to modify switch settings. These commands modify the running configuration only and are not saved when the switch is rebooted. To store the running configuration in non-volatile storage, use the copy running-config startup-config command.
4 Command Line Interface Command Line Processing Commands are not case sensitive. You can abbreviate commands and parameters as long as they contain enough letters to differentiate them from any other currently available commands or parameters. You can use the Tab key to complete partial commands, or enter a partial command followed by the “?” character to display a list of possible matches.
Command Groups 4 Command Groups The system commands can be broken down into the functional groups shown below.
4 Command Line Interface The access mode shown in the following tables is indicated by these abbreviations: ACL (Access Control List Configuration) CM (Class Map Configuration) GC (Global Configuration) IC (Interface Configuration) LC (Line Configuration) MST (Multiple Spanning Tree) NE (Normal Exec) PE (Privileged Exec) PM (Policy Map Configuration) VC (VLAN Database Configuration) Line Commands You can access the onboard configuration program by attaching a VT100 compatible device to the server’s seri
Line Commands 4 line This command identifies a specific line for configuration, and to process subsequent line configuration commands. Syntax line {console | vty} • console - Console terminal line. • vty - Virtual terminal for remote console access (i.e., Telnet). Default Setting There is no default line. Command Mode Global Configuration Command Usage Telnet is considered a virtual terminal connection and will be shown as “Vty” in screen displays such as show users.
4 Command Line Interface - login selects authentication by a single global password as specified by the password line configuration command. When using this method, the management interface starts in Normal Exec (NE) mode. - login local selects authentication via the user name and password specified by the username command (i.e., default setting).
4 Line Commands during system bootup or when downloading the configuration file from a TFTP server. There is no need for you to manually configure encrypted passwords. Example Console(config-line)#password 0 secret Console(config-line)# Related Commands login (4-11) password-thresh (4-14) timeout login response This command sets the interval that the system waits for a user to log into the CLI. Use the no form to restore the default.
4 Command Line Interface Syntax exec-timeout [seconds] no exec-timeout seconds - Integer that specifies the number of seconds. (Range: 0-65535 seconds; 0: no timeout) Default Setting CLI: No timeout Telnet: 10 minutes Command Mode Line Configuration Command Usage • If user input is detected within the timeout interval, the session is kept open; otherwise the session is terminated. • This command applies to both the local console and Telnet connections. • The timeout for Telnet cannot be disabled.
Line Commands 4 Command Usage • When the logon attempt threshold is reached, the system interface becomes silent for a specified amount of time before allowing the next logon attempt. (Use the silent-time command to set this interval.) When this threshold is reached for Telnet, the Telnet logon interface shuts down. • This command applies to both the local console and Telnet connections.
4 Command Line Interface Syntax databits {7 | 8} no databits • 7 - Seven data bits per character. • 8 - Eight data bits per character. Default Setting 8 data bits per character Command Mode Line Configuration Command Usage The databits command can be used to mask the high bit on input from devices that generate 7 data bits with parity. If parity is being generated, specify 7 data bits per character. If no parity is required, specify 8 data bits per character.
4 Line Commands Example To specify no parity, enter this command: Console(config-line)#parity none Console(config-line)# speed This command sets the terminal line’s baud rate. This command sets both the transmit (to terminal) and receive (from terminal) speeds. Use the no form to restore the default setting. Syntax speed bps no speed bps - Baud rate in bits per second.
4 Command Line Interface Example To specify 2 stop bits, enter this command: Console(config-line)#stopbits 2 Console(config-line)# disconnect This command terminates an SSH, Telnet, or console connection. Syntax disconnect session-id session-id – The session identifier for an SSH, Telnet or console connection. (Range: 0-4) Command Mode Privileged Exec Command Usage Specifying session identifier “0” will disconnect the console connection.
General Commands 4 Example To show all lines, enter this command: Console#show line Console configuration: Password threshold: 3 times Interactive timeout: Disabled Login timeout: Disabled Silent time: Disabled Baudrate: 9600 Databits: 8 Parity: none Stopbits: 1 VTY configuration: Password threshold: 3 times Interactive timeout: 600 sec Login timeout: 300 sec console# General Commands Table 4-6 General Commands Command Function Mode Page enable Activates privileged mode NE 4-19 disable Returns t
4 Command Line Interface Default Setting Level 15 Command Mode Normal Exec Command Usage • “super” is the default password required to change the command mode from Normal Exec to Privileged Exec. (To set this password, see the enable password command on page 4-26.) • The “#” character is appended to the end of the prompt to indicate that the system is in privileged access mode.
General Commands 4 configure This command activates Global Configuration mode. You must enter this mode to modify any settings on the switch. You must also enter Global Configuration mode prior to enabling some of the other configuration modes, including Interface Configuration, Line Configuration, and VLAN Database Configuration. See “Understanding Command Modes” on page 4-5.
4 Command Line Interface The ! command repeats commands from the Execution command history buffer when you are in Normal Exec or Privileged Exec Mode, and commands from the Configuration command history buffer when you are in any of the configuration modes. In this example, the !2 command repeats the second command in the Execution history buffer (config). Console#!2 Console#config Console(config)# reload This command restarts the system.
General Commands 4 exit This command returns to the previous configuration mode or exit the configuration program. Default Setting None Command Mode Any Example This example shows how to return to the Privileged Exec mode from the Global Configuration mode, and then quit the CLI session: Console(config)#exit Console#exit Press ENTER to start session User Access Verification Username: quit This command exits the configuration program.
4 Command Line Interface System Management Commands These commands are used to control system logs, passwords, user names, browser configuration options, and display or configure a variety of other system information.
System Management Commands 4 Example Console(config)#prompt RD2 RD2(config)# hostname This command specifies or modifies the host name for this device. Use the no form to restore the default host name. Syntax hostname name no hostname name - The name of this host. (Maximum length: 255 characters) Default Setting None Command Mode Global Configuration Example Console(config)#hostname RD#1 Console(config)# User Access Commands The basic commands required for management access are listed in this section.
4 Command Line Interface • name - The name of the user. (Maximum length: 8 characters, case sensitive. Maximum users: 16) • access-level level - Specifies the user level. The device has two predefined privilege levels: 0: Normal Exec, 15: Privileged Exec. • nopassword - No password is required for this user to log in. • {0 | 7} - 0 means plain password, 7 means encrypted password. • password password - The authentication password for the user.
System Management Commands 4 • password - password for this privilege level. (Maximum length: 8 characters plain text, 32 encrypted, case sensitive) Default Setting • The default is level 15. • The default password is “super” Command Mode Global Configuration Command Usage • You cannot set a null password. You will have to enter a password to change the command mode from Normal Exec to Privileged Exec with the enable command (page 4-19).
4 Command Line Interface • telnet-client - Adds IP address(es) to the Telnet group. • start-address - A single IP address, or the starting address of a range. • end-address - The end address of a range. Default Setting All addresses Command Mode Global Configuration Command Usage • If anyone tries to access a management interface on the switch from an invalid address, the switch will reject the connection, enter an event message in the system log, and send a trap message to the trap manager.
System Management Commands 4 Example Console#show management all-client Management IP Filter HTTP-Client: Start IP address End IP address ----------------------------------------------1. 192.168.1.19 192.168.1.19 2. 192.168.1.25 192.168.1.30 SNMP-Client: Start IP address End IP address ----------------------------------------------1. 192.168.1.19 192.168.1.19 2. 192.168.1.25 192.168.1.30 TELNET-Client: Start IP address End IP address ----------------------------------------------1. 192.168.1.19 192.168.1.
4 Command Line Interface Example Console(config)#ip http port 769 Console(config)# Related Commands ip http server (4-30) ip http server This command allows this device to be monitored or configured from a browser. Use the no form to disable this function.
System Management Commands 4 • When you start HTTPS, the connection is established in this way: - The client authenticates the server using the server’s digital certificate. - The client and server negotiate a set of security protocols to use for the connection. - The client and server generate session keys for encrypting and decrypting data. • The client and server establish a secure encrypted connection. A padlock icon should appear in the status bar for Internet Explorer 5.x and Netscape Navigator 6.
4 Command Line Interface • If you change the HTTPS port number, clients attempting to connect to the HTTPS server must specify the port number in the URL, in this format: https://device:port_number Example Console(config)#ip http secure-port 1000 Console(config)# Related Commands ip http secure-server (4-30) Telnet Server Commands Table 4-14 Telnet Server Commands Command Function Mode ip telnet port Specifies the port to be used by the Telnet interface GC Page 4-29 ip telnet server Allows the s
System Management Commands 4 ip telnet server This command allows this device to be monitored or configured from Telnet. Use the no form to disable this function. Syntax [no] ip telnet server Default Setting Enabled Command Mode Global Configuration Example Console(config)#ip telnet server Console(config)# Related Commands ip telnet port (4-32) Secure Shell Commands The Berkley-standard includes remote access tools originally designed for Unix systems.
4 Command Line Interface Table 4-15 SSH Commands (Continued) Command Function Mode Page copy tftp public-key Copies the user’s public key from a TFTP server to the switch PE 4-64 delete public-key Deletes the public key for the specified user PE 4-38 ip ssh crypto host-key generate Generates the host key PE 4-38 ip ssh crypto zeroize Clear the host key from RAM PE 4-39 ip ssh save host-key Saves the host key from RAM to flash memory PE 4-39 disconnect Terminates a line connection
4 System Management Commands firmware only accepts public key files based on standard UNIX format as shown in the following example for an RSA Version 1 key: 1024 35 1341081685609893921040944920155425347631641921872958921143173880 05553616163105177594083868631109291232226828519254374603100937187721199 69631781366277414168985132049117204830339254324101637997592371449011938 00609025394840848271781943722884025331159521348610229029789827213532671 31629432532818915045306393916643 steve@192.168.1.19 4.
4 Command Line Interface • The SSH server uses DSA or RSA for key exchange when the client first establishes a connection with the switch, and then negotiates with the client to select either DES (56-bit) or 3DES (168-bit) for data encryption. • You must generate the host key before enabling the SSH server.
System Management Commands 4 ip ssh authentication-retries This command configures the number of times the SSH server attempts to reauthenticate a user. Use the no form to restore the default setting. Syntax ip ssh authentication-retries count no ip ssh authentication-retries count – The number of authentication attempts permitted after which the interface is reset.
4 Command Line Interface delete public-key This command deletes the specified user’s public key. Syntax delete public-key username [dsa | rsa] • username – Name of an SSH user. (Range: 1-8 characters) • dsa – DSA public key type. • rsa – RSA public key type. Default Setting Deletes both the DSA and RSA key. Command Mode Privileged Exec Example Console#delete public-key admin dsa Console# ip ssh crypto host-key generate This command generates the host key pair (i.e., public and private).
System Management Commands 4 Related Commands ip ssh crypto zeroize (4-39) ip ssh save host-key (4-39) ip ssh crypto zeroize This command clears the host key from memory (i.e. RAM). Syntax ip ssh crypto zeroize [dsa | rsa] • dsa – DSA key type. • rsa – RSA key type. Default Setting Clears both the DSA and RSA key. Command Mode Privileged Exec Command Usage • This command clears the host key from volatile memory (RAM). Use the no ip ssh save host-key command to clear the host key from flash memory.
4 Command Line Interface Example Console#ip ssh save host-key dsa Console# Related Commands ip ssh crypto host-key generate (4-38) show ip ssh This command displays the connection settings used when authenticating client access to the SSH server. Command Mode Privileged Exec Example Console#show ip ssh SSH Enabled - version 1.99 Negotiation timeout: 120 secs; Authentication retries: 3 Server key size: 768 bits Console# show ssh This command displays the current SSH server connections.
System Management Commands 4 Table 4-16 show ssh - display description (Continued) Field Description Encryption The encryption method is automatically negotiated between the client and server. Options for SSHv1.5 include: DES, 3DES Options for SSHv2.
4 Command Line Interface Example Console#show public-key host Host: RSA: 1024 35 1568499540186766925933394677505461732531367489083654725415020245593199868 5443583616519999233297817660658309586108259132128902337654680172627257141 3428762941301196195566782595664104869574278881462065194174677298486546861 5717739390164779355942303577413098022737087794545240839717526463580581767 16709574804776117 DSA: ssh-dss AAAB3NzaC1kc3MAAACBAPWKZTPbsRIB8ydEXcxM3dyV/yrDbKStIlnzD/Dg0h2Hxc YV44sXZ2JXhamLK6P8bvuiyacWbUW/a4PAtp
System Management Commands 4 Event Logging Commands Table 4-17 Event Logging Commands Command Function Mode logging on Controls logging of error messages GC Page 4-43 logging history Limits syslog messages saved to switch memory based on severity GC 4-44 logging host Adds a syslog server host IP address that will receive logging messages GC 4-45 logging facility Sets the facility type for remote logging of syslog messages GC 4-45 logging trap Limits syslog messages saved to a remote se
4 Command Line Interface logging history This command limits syslog messages saved to switch memory based on severity. The no form returns the logging of syslog messages to the default level. Syntax logging history {flash | ram} level no logging history {flash | ram} • flash - Event history stored in flash memory (i.e., permanent memory). • ram - Event history stored in temporary RAM (i.e., memory flushed on power reset). • level - One of the levels listed below.
4 System Management Commands logging host This command adds a syslog server host IP address that will receive logging messages. Use the no form to remove a syslog server host. Syntax [no] logging host host_ip_address host_ip_address - The IP address of a syslog server. Default Setting None Command Mode Global Configuration Command Usage • By using this command more than once you can build up a list of host IP addresses. • The maximum number of host IP addresses allowed is five.
4 Command Line Interface logging trap This command enables the logging of system messages to a remote server, or limits the syslog messages saved to a remote server based on severity. Use this command without a specified level to enable remote logging. Use the no form to disable remote logging. Syntax logging trap [level] no logging trap level - One of the level arguments listed below. Messages sent include the selected level up through level 0. (Refer to the table on page 4-44.
System Management Commands 4 Example Console#clear logging Console# Related Commands show logging (4-47) show logging This command displays the configuration settings for logging messages to local switch memory, to an SMTP event handler, or to a remote syslog server. Syntax show logging {flash | ram | sendmail | trap} • flash - Displays settings for storing event messages in flash memory (i.e., permanent memory). • ram - Displays settings for storing event messages in temporary RAM (i.e.
4 Command Line Interface The following example displays settings for the trap function. Console#show logging trap Syslog logging: Enable REMOTELOG status: disable REMOTELOG facility type: local use 7 REMOTELOG level type: Debugging messages REMOTELOG server IP address: 1.2.3.4 REMOTELOG server IP address: 0.0.0.0 REMOTELOG server IP address: 0.0.0.0 REMOTELOG server IP address: 0.0.0.0 REMOTELOG server IP address: 0.0.0.
System Management Commands 4 Example The following example shows sample messages stored in RAM. Console#show log ram [5] 00:01:06 2001-01-01 "STA root change notification." level: 6, module: 6, function: 1, and [4] 00:01:00 2001-01-01 "STA root change notification." level: 6, module: 6, function: 1, and [3] 00:00:54 2001-01-01 "STA root change notification." level: 6, module: 6, function: 1, and [2] 00:00:50 2001-01-01 "STA topology change notification.
4 Command Line Interface Command Mode Global Configuration Command Usage • You can specify up to three SMTP servers for event handing. However, you must enter a separate command to specify each server. • To send email alerts, the switch first opens a connection, sends all the email alerts waiting in the queue one by one, and finally closes the connection.
4 System Management Commands logging sendmail source-email This command sets the email address used for the “From” field in alert messages. Use the no form to delete the source email address. Syntax [no] logging sendmail source-email email-address email-address - The source email address used in alert messages.
4 Command Line Interface logging sendmail This command enables SMTP event handling. Use the no form to disable this function. Syntax [no] logging sendmail Default Setting Enabled Command Mode Global Configuration Example Console(config)#logging sendmail Console(config)# show logging sendmail This command displays the settings for the SMTP event handler. Command Mode Normal Exec, Privileged Exec Example Console#show logging sendmail SMTP servers ----------------------------------------------1. 192.168.1.
System Management Commands 4 Time Commands The system clock can be dynamically set by polling a set of specified time servers (NTP or SNTP). Maintaining an accurate time on the switch enables the system log to record meaningful dates and times for event entries. If the clock is not set, the switch will only record the time from the factory default set at the last bootup.
4 Command Line Interface Example Console(config)#sntp server 10.1.0.19 Console(config)#sntp poll 60 Console(config)#sntp client Console(config)#end Console#show sntp Current time: Dec 23 02:52:44 2002 Poll interval: 60 Current mode: unicast SNTP status: Enabled SNTP server: 10.1.0.19 0.0.0.0 0.0.0.0 Current server: 10.1.0.19 Console# Related Commands sntp server (4-54) sntp poll (4-55) show sntp (4-55) sntp server This command sets the IP address of the servers to which SNTP time requests are issued.
4 System Management Commands sntp poll This command sets the interval between sending time requests when the switch is set to SNTP client mode. Use the no form to restore to the default. Syntax sntp poll seconds no sntp poll seconds - Interval between time requests.
4 Command Line Interface clock timezone This command sets the time zone for the switch’s internal clock. Syntax clock timezone name hour hours minute minutes {before-utc | after-utc} • • • • • name - Name of timezone, usually an acronym. (Range: 1-29 characters) hours - Number of hours before/after UTC. (Range: 0-12 hours) minutes - Number of minutes before/after UTC. (Range: 0-59 minutes) before-utc - Sets the local time zone before (east) of UTC.
System Management Commands 4 Default Setting None Command Mode Privileged Exec Example This example shows how to set the system clock to 15:12:34, April 1st, 2004. Console#calendar set 15 12 34 1 April 2004 Console# show calendar This command displays the system clock.
4 Command Line Interface Command Usage • Use this command in conjunction with the show running-config command to compare the information in running memory to the information stored in non-volatile memory. • This command displays settings for key command modes. Each mode group is separated by “!” symbols, and includes the configuration mode command, and corresponding commands.
System Management Commands 4 Related Commands show running-config (4-59) show running-config This command displays the configuration information currently in use. Default Setting None Command Mode Privileged Exec Command Usage • Use this command in conjunction with the show startup-config command to compare the information in running memory to the information stored in non-volatile memory. • This command displays settings for key command modes.
4 Command Line Interface Example Console#show running-config building startup-config, please wait..... ! phymap 00-12-cf-ce-2a-20 00-00-00-00-00-00 00-00-00-00-00-00 00-00-00-00-00-00 00-00-00-00-00-00 00-00-00-00-00-00 00-00-00-00-00-00 00-00-00-00-00-00 ! SNTP server 0.0.0.0 0.0.0.0 0.0.0.
4 System Management Commands show system This command displays system information. Default Setting None Command Mode Normal Exec, Privileged Exec Command Usage • For a description of the items shown by this command, refer to “Displaying System Information” on page 3-10. • The POST results should all display “PASS.” If any POST test indicates “FAIL,” contact your distributor for assistance. Example Console#show system System Description: TL-SG5426 System OID String: 1.3.6.1.4.1.11863.6.10.
4 Command Line Interface Command Usage The session used to execute this command is indicated by a “*” symbol next to the Line (i.e., session) index number. Example Console#show users Username accounts: Username Privilege Public-Key -------- --------- ---------admin 15 None guest 0 None steve 15 RSA Online users: Line Username Idle time (h:m:s) Remote IP addr. ----------- -------- ----------------- --------------0 console admin 0:14:14 * 1 VTY 0 admin 0:00:00 192.168.1.19 2 SSH 1 steve 0:00:06 192.168.1.
4 System Management Commands Example Console#show version Unit1 Serial number: Service tag: Hardware version: Module A type: Module B type: Number of ports: Main power status: Redundant power status S416000937 R01 1000BaseT 1000BaseT 26 up :not present Agent (master) Unit ID: Loader version: Boot ROM version: Operation code version: 1 2.2.1.4 2.2.1.8 2.2.7.
4 Command Line Interface • Enabling jumbo frames will limit the maximum threshold for broadcast storm control to 64 packets per second. (See the switchport broadcast command on page 4-122.) • The current setting for jumbo frames can be displayed with the show system command (page 4-61). Example Console(config)#jumbo frame Console(config)# Flash/File Commands These commands are used to manage the system code or configuration files.
Flash/File Commands 4 • https-certificate - Copies an HTTPS certificate from an TFTP server to the switch. • public-key - Keyword that allows you to copy a SSH key from a TFTP server. (“Secure Shell Commands” on page 4-33) • unit - Keyword that allows you to copy to/from a unit. Default Setting None Command Mode Privileged Exec Command Usage • The system prompts for data required to complete the copy command.
4 Command Line Interface Example The following example shows how to upload the configuration settings to a file on the TFTP server: Console#copy file tftp Choose file type: 1. config: 2. opcode: <1-2>: 1 Source file name: startup TFTP server ip address: 10.1.0.99 Destination file name: startup.01 TFTP completed. Success. Console# The following example shows how to copy the running configuration to a startup file. Console#copy running-config file destination file name: startup Write to FLASH Programming.
Flash/File Commands 4 This example shows how to copy a public-key used by SSH from a TFTP server. Note that public key authentication via SSH is only supported for users configured locally on the switch: Console#copy tftp public-key TFTP server IP address: 192.168.1.19 Choose public key type: 1. RSA: 2. DSA: <1-2>: 1 Source file name: steve.pub Username: steve TFTP Download Success. Write to FLASH Programming. Success. Console# delete This command deletes a file or image.
4 Command Line Interface dir This command displays a list of files in flash memory. Syntax dir [unit:] {{boot-rom: | config: | opcode:} [:filename]} The type of file or image to display includes: • • • • • boot-rom - Boot ROM (or diagnostic) image file. config - Switch configuration file. opcode - Run-time operation code image file. filename - Name of the configuration file or code image. unit - Stack unit.
4 Flash/File Commands whichboot This command displays which files were booted when the system powered up. Syntax whichboot [unit] unit - Stack unit. (Range: Unit 1) Default Setting None Command Mode Privileged Exec Example This example shows the information displayed by the whichboot command. See the table under the dir command for a description of the file information displayed by this command.
4 Command Line Interface Command Usage • A colon (:) is required after the specified unit number and file type. • If the file contains an error, it cannot be set as the default file. Example Console(config)#boot system config: startup Console(config)# Related Commands dir (4-68) whichboot (4-69) Authentication Commands You can configure this switch to authenticate users logging into the system for management access using local or RADIUS authentication methods.
Authentication Commands 4 authentication login This command defines the login authentication method and precedence. Use the no form to restore the default. Syntax authentication login {[local] [radius] [tacacs]} no authentication login • local - Use local password. • radius - Use RADIUS server password. • tacacs - Use TACACS server password. Default Setting Local Command Mode Global Configuration Command Usage • RADIUS uses UDP while TACACS+ uses TCP.
4 Command Line Interface authentication enable This command defines the authentication method and precedence to use when changing from Exec command mode to Privileged Exec command mode with the enable command (see page 4-19). Use the no form to restore the default. Syntax authentication enable {[local] [radius] [tacacs]} no authentication enable • local - Use local password only. • radius - Use RADIUS server password only. • tacacs - Use TACACS server password.
Authentication Commands 4 Command Usage • RADIUS uses UDP while TACACS+ uses TCP. UDP only offers best effort delivery, while TCP offers a connection-oriented transport. Also, note that RADIUS encrypts only the password in the access-request packet from the client to the server, while TACACS+ encrypts the entire body of the packet. • RADIUS and TACACS+ logon authentication assigns a specific privilege level for each user name and password pair.
4 Command Line Interface radius-server host This command specifies primary and backup RADIUS servers and authentication parameters that apply to each server. Use the no form to restore the default values. Syntax [no] radius-server index host {host_ip_address | host_alias} [auth-port auth_port] [timeout timeout] [retransmit retransmit] [key key] • index - Allows you to specify up to five servers. These servers are queried in sequence until a server responds or the retransmit period expires.
4 Authentication Commands Command Mode Global Configuration Example Console(config)#radius-server port 181 Console(config)# radius-server key This command sets the RADIUS encryption key. Use the no form to restore the default. Syntax radius-server key key_string no radius-server key key_string - Encryption key used to authenticate logon access for client. Do not use blank spaces in the string.
4 Command Line Interface radius-server timeout This command sets the interval between transmitting authentication requests to the RADIUS server. Use the no form to restore the default. Syntax radius-server timeout number_of_seconds no radius-server timeout number_of_seconds - Number of seconds the switch waits for a reply before resending a request.
Authentication Commands 4 TACACS+ Client Terminal Access Controller Access Control System (TACACS+) is a logon authentication protocol that uses software running on a central server to control access to TACACS-aware devices on the network. An authentication server contains a database of multiple user name/password pairs with associated privilege levels for each user or group that require management access to a switch.
4 Command Line Interface Command Mode Global Configuration Example Console(config)#tacacs-server port 181 Console(config)# tacacs-server key This command sets the TACACS+ encryption key. Use the no form to restore the default. Syntax tacacs-server key key_string no tacacs-server key key_string - Encryption key used to authenticate logon access for the client. Do not use blank spaces in the string.
Authentication Commands 4 Port Security Commands These commands can be used to enable port security on a port. When using port security, the switch stops learning new MAC addresses on the specified port when it has reached a configured maximum number. Only incoming traffic with source addresses already stored in the dynamic or static address table for this port will be authorized to access the network.
4 Command Line Interface Command Usage • If you enable port security, the switch stops learning new MAC addresses on the specified port when it has reached a configured maximum number. Only incoming traffic with source addresses already stored in the dynamic or static address table will be accepted. • First use the port security max-mac-count command to set the number of addresses, and then use the port security command to enable security on the port.
Authentication Commands 4 802.1X Port Authentication The switch supports IEEE 802.1X (dot1x) port-based access control that prevents unauthorized access to the network by requiring users to first submit credentials for authentication. Client authentication is controlled centrally by a RADIUS server using EAP (Extensible Authentication Protocol). Table 4-32 802.1X Port Authentication Command Function Mode Page dot1x system-auth-control Enables dot1x globally on the switch.
4 Command Line Interface dot1x default This command sets all configurable dot1x global and port settings to their default values. Command Mode Global Configuration Example Console(config)#dot1x default Console(config)# dot1x max-req This command sets the maximum number of times the switch port will retransmit an EAP request/identity packet to the client before it times out the authentication session. Use the no form to restore the default.
Authentication Commands 4 Default force-authorized Command Mode Interface Configuration Example Console(config)#interface eth 1/2 Console(config-if)#dot1x port-control auto Console(config-if)# dot1x operation-mode This command allows single or multiple hosts (clients) to connect to an 802.1X-authorized port. Use the no form with no keywords to restore the default to single host. Use the no form with the multi-host max-count keywords to restore the default maximum count.
4 Command Line Interface dot1x re-authenticate This command forces re-authentication on all ports or a specific interface. Syntax dot1x re-authenticate [interface] interface • ethernet unit/port - unit - Stack unit. (Range: Unit 1) - port - Port number. (Range: 1-26) Command Mode Privileged Exec Example Console#dot1x re-authenticate Console# dot1x re-authentication This command enables periodic re-authentication globally for all ports. Use the no form to disable re-authentication.
4 Authentication Commands Command Mode Interface Configuration Example Console(config)#interface eth 1/2 Console(config-if)#dot1x timeout quiet-period 350 Console(config-if)# dot1x timeout re-authperiod This command sets the time period after which a connected client must be re-authenticated. Syntax dot1x timeout re-authperiod seconds no dot1x timeout re-authperiod seconds - The number of seconds.
4 Command Line Interface Example Console(config)#interface eth 1/2 Console(config-if)#dot1x timeout tx-period 300 Console(config-if)# show dot1x This command shows general port authentication related settings on the switch or a specific interface. Syntax show dot1x [statistics] [interface interface] • statistics - Displays dot1x status for each port. • interface • ethernet unit/port - unit - Stack unit. (Range: Unit 1) - port - Port number.
Authentication Commands 4 • 802.1X Port Details – Displays the port access control parameters for each interface, including the following items: - reauth-enabled – Periodic re-authentication (page 4-84). - reauth-period – Time after which a connected client must be re-authenticated (page 4-85). - quiet-period – Time a port waits after Max Request Count is exceeded before attempting to acquire a new client (page 4-84).
4 Command Line Interface Example Console#show dot1x Global 802.1X Parameters system-auth-control: enable 802.1X Port Summary Port Name 1/1 1/2 . . . 1/26 Status disabled enabled Operation Mode Single-Host Single-Host Mode ForceAuthorized auto Authorized n/a yes disabled Single-Host ForceAuthorized n/a 802.1X Port Details 802.1X is disabled on port 1/1 802.
Access Control List Commands 4 Access Control List Commands Access Control Lists (ACL) provide packet filtering for IP frames (based on address, protocol, or Layer 4 protocol port number) or any frames (based on MAC address or Ethernet type). To filter packets, first create an access list, add the required rules and then bind the list to a specific port. Access Control Lists An ACL is a sequential list of permit or deny conditions that apply to IP addresses, MAC addresses, or other more specific criteria.
4 Command Line Interface IP ACLs Table 4-34 IP ACLs Command Function Mode access-list ip Creates an IP ACL and enters configuration mode GC Page 4-90 permit, deny Filters packets matching a specified source IP address STD-ACL 4-91 permit, deny Filters packets meeting the specified criteria, including EXT-ACL source and destination IP address, TCP/UDP port number, and protocol type 4-91 show ip access-list Displays the rules for configured IP ACLs PE 4-93 ip access-group Adds a port to a
Access Control List Commands 4 Related Commands permit, deny 4-91 ip access-group (4-93) show ip access-list (4-93) permit, deny (Standard ACL) This command adds a rule to a Standard IP ACL. The rule sets a filter condition for packets emanating from the specified source. Use the no form to remove a rule. Syntax [no] {permit | deny} {any | source bitmask | host source} • • • • any – Any source IP address. source – Source IP address. bitmask – Decimal number representing the address bits to match.
4 Command Line Interface Syntax [no] {permit | deny} [protocol-number | udp] {any | source address-bitmask | host source} {any | destination address-bitmask | host destination} [source-port sport [end]] [destination-port dport [end]] [no] {permit | deny} tcp {any | source address-bitmask | host source} {any | destination address-bitmask | host destination} [source-port sport [end]] [destination-port dport [end]] • • • • • • • • protocol-number – A specific protocol number.
Access Control List Commands 4 This allows TCP packets from class C addresses 192.168.1.0 to any destination address when set for destination TCP port 80 (i.e., HTTP). Console(config-ext-acl)#permit 192.168.1.0 255.255.255.0 any destination-port 80 Console(config-ext-acl)# Related Commands access-list ip (4-90) show ip access-list This command displays the rules for configured IP ACLs. Syntax show ip access-list {standard | extended} [acl_name] • standard – Specifies a standard IP ACL.
Access Control List Commands 4 MAC ACLs The commands in this section configure ACLs based on hardware addresses, packet format, and Ethernet type.
4 Command Line Interface permit, deny (MAC ACL) This command adds a rule to a MAC ACL. The rule filters packets matching a specified MAC source or destination address (i.e., physical layer address), or Ethernet protocol type. Use the no form to remove a rule. Syntax [no] {permit | deny} {any | host source | source address-bitmask} {any | host destination | destination address-bitmask} [vid vid vid-bitmask] [ethertype protocol [protocol-bitmask]] Note:- The default is for Ethernet II packets.
4 Access Control List Commands Default Setting None Command Mode MAC ACL Command Usage • New rules are added to the end of the list. • The ethertype option can only be used to filter Ethernet II formatted packets. • A detailed listing of Ethernet protocol types can be found in RFC 1060.
4 Command Line Interface mac access-group This command binds a port to a MAC ACL. Use the no form to remove the port. Syntax mac access-group acl_name in • acl_name – Name of the ACL. (Maximum length: 16 characters) • in – Indicates that this list applies to ingress packets. Default Setting None Command Mode Interface Configuration (Ethernet) Command Usage • A port can only be bound to one ACL.
4 Command Line Interface Command Usage • A port can only be bound to one ACL. • If a port is already bound to an ACL and you bind it to a different ACL, the switch will replace the old binding with the new one. • You must configure a mask for an ACL rule before you can bind it to a port. Example Console(config)#int eth 1/25 Console(config-if)#ip access-group david in Console(config-if)# Related Commands show ip access-list (4-93) show ip access-group This command shows the ports assigned to IP ACLs.
4 Access Control List Commands ACL Information Table 4-36 ACL Information Command Function Mode show access-list Show all ACLs and associated rules PE Page 4-99 show access-group Shows the ACLs assigned to each port PE 4-99 show access-list This command shows all ACLs and associated rules, as well as all the user-defined masks. Command Mode Privileged Exec Command Usage Once the ACL is bound to an interface (i.e.
4 Command Line Interface SNMP Commands Controls access to this switch from management stations using the Simple Network Management Protocol (SNMP), as well as the error types sent to trap managers. SNMP Version 3 also provides security features that cover message integrity, authentication, and encryption; as well as controlling user access to specific areas of the MIB tree.
SNMP Commands 4 snmp-server This command enables the SNMPv3 engine and services for all management clients (i.e., versions 1, 2c, 3). Use the no form to disable the server. Syntax [no] snmp-server Default Setting Enabled Command Mode Global Configuration Example Console(config)#snmp-server Console(config)# show snmp This command can be used to check the status of SNMP communications.
4 Command Line Interface Example Console#show snmp SNMP Agent: enabled SNMP traps: Authentication: enable Link-up-down: enable SNMP communities: 1. private, and the privilege is read-write 2.
SNMP Commands 4 • private - Read/write access. Authorized management stations are able to both retrieve and modify MIB objects. Command Mode Global Configuration Example Console(config)#snmp-server community alpha rw Console(config)# snmp-server contact This command sets the system contact string. Use the no form to remove the system contact information. Syntax snmp-server contact string no snmp-server contact string - String that describes the system contact information.
4 Command Line Interface Command Mode Global Configuration Example Console(config)#snmp-server location WC-19 Console(config)# Related Commands snmp-server contact (4-103) snmp-server host This command specifies the recipient of a Simple Network Management Protocol notification operation. Use the no form to remove the specified host.
SNMP Commands 4 • SNMP Version: 1 • UDP Port: 162 Command Mode Global Configuration Command Usage • If you do not enter an snmp-server host command, no notifications are sent. In order to configure the switch to send SNMP notifications, you must enter at least one snmp-server host command. In order to enable multiple hosts, you must issue a separate snmp-server host command for each host. • The snmp-server host command is used in conjunction with the snmp-server enable traps command.
4 Command Line Interface supports. If the snmp-server host command does not specify the SNMP version, the default is to send SNMP version 1 notifications. • If you specify an SNMP Version 3 host, then the community string is interpreted as an SNMP user name. If you use the V3 “auth” or “priv” options, the user name must first be defined with the snmp-server user command.
SNMP Commands 4 conjunction with the corresponding entries in the Notify View assigned by the snmp-server group command (page 4-110). Example Console(config)#snmp-server enable traps link-up-down Console(config)# Related Commands snmp-server host (4-104) snmp-server engine-id This command configures an identification string for the SNMPv3 engine. Use the no form to restore the default.
4 Command Line Interface fill the octet. For example, entering the value “123456789” results in an engine ID of “1234567890.” • A local engine ID is automatically generated that is unique to the switch. This is referred to as the default engine ID. If the local engine ID is deleted or changed, all SNMP users will be cleared. You will need to reconfigure all existing users (page 4-113).
SNMP Commands 4 snmp-server view This command adds an SNMP view which controls user access to the MIB. Use the no form to remove an SNMP view. Syntax snmp-server view view-name oid-tree {included | excluded} no snmp-server view view-name • view-name - Name of an SNMP view. (Range: 1-64 characters) • oid-tree - Object identifier of a branch within the MIB tree. Wild cards can be used to mask a specific portion of the OID string. (Refer to the examples.) • included - Defines an included view.
4 Command Line Interface show snmp view This command shows information on the SNMP views. Command Mode Privileged Exec Example Console#show snmp view View Name: mib-2 Subtree OID: 1.2.2.3.6.2.1 View Type: included Storage Type: permanent Row Status: active View Name: defaultview Subtree OID: 1 View Type: included Storage Type: volatile Row Status: active Console# Table 4-39 show snmp view - display description Field Description View Name Name of an SNMP view. Subtree OID A branch in the MIB tree.
SNMP Commands 4 Default Setting • • • • Default groups: public17 (read only), private18 (read/write) readview - Every object belonging to the Internet OID space (1.3.6.1). writeview - Nothing is defined. notifyview - Nothing is defined. Command Mode Global Configuration Command Usage • A group sets the access policy for the assigned users. • When authentication is selected, the MD5 or SHA algorithm is used as specified in the snmp-server user command.
4 Command Line Interface show snmp group Four default groups are provided – SNMPv1 read-only access and read/write access, and SNMPv2c read-only access and read/write access.
SNMP Commands 4 Table 4-40 show snmp group - display description Field Description groupname Name of an SNMP group. security model The SNMP version. readview The associated read view. writeview The associated write view. notifyview The associated notify view. storage-type The storage type for this entry. Row Status The row status of this entry. snmp-server user This command adds a user to an SNMP group, restricting the user to a specific SNMP Read, Write, or Notify View.
4 Command Line Interface Default Setting None Command Mode Global Configuration Command Usage • The SNMP engine ID is used to compute the authentication/privacy digests from the password. You should therefore configure the engine ID with the snmp-server engine-id command before using this configuration command. • Before you configure a remote user, use the snmp-server engine-id command (page 4-107) to specify the engine ID for the remote device where the user resides.
SNMP Commands 4 show snmp user This command shows information on SNMP users.
4 Command Line Interface Interface Commands These commands are used to display or set communication parameters for an Ethernet port, aggregated link, or VLAN.
4 Interface Commands Command Mode Global Configuration Example To specify port 24, enter the following command: Console(config)#interface ethernet 1/24 Console(config-if)# description This command adds a description to an interface. Use the no form to remove the description. Syntax description string no description string - Comment or a description to help you remember what is attached to this interface.
4 Command Line Interface Default Setting • Auto-negotiation is enabled by default. • When auto-negotiation is disabled, the default speed-duplex setting is 100half for 100BASE-TX ports and 1000full for Gigabit Ethernet ports. Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • To force operation to the speed and duplex mode specified in a speed-duplex command, use the no negotiation command to disable auto-negotiation on the selected interface.
4 Interface Commands • If autonegotiation is disabled, auto-MDI/MDI-X pin signal configuration will also be disabled for the RJ-45 ports. Example The following example configures port 11 to use autonegotiation. Console(config)#interface ethernet 1/11 Console(config-if)#negotiation Console(config-if)# Related Commands capabilities (4-119) speed-duplex (4-117) capabilities This command advertises the port capabilities of a given interface during autonegotiation.
4 Command Line Interface Example The following example configures Ethernet port 5 capabilities to 100half, 100full and flow control. Console(config)#interface ethernet 1/5 Console(config-if)#capabilities 100half Console(config-if)#capabilities 100full Console(config-if)#capabilities flowcontrol Console(config-if)# Related Commands negotiation (4-118) speed-duplex (4-117) flowcontrol (4-120) flowcontrol This command enables flow control. Use the no form to disable flow control.
4 Interface Commands Example The following example enables flow control on port 5. Console(config)#interface ethernet 1/5 Console(config-if)#flowcontrol Console(config-if)#no negotiation Console(config-if)# Related Commands negotiation (4-118) capabilities (flowcontrol, symmetric) (4-119) shutdown This command disables an interface. To restart a disabled interface, use the no form. Syntax [no] shutdown Default Setting All interfaces are enabled.
4 Command Line Interface switchport broadcast packet-rate This command configures broadcast storm control. Use the no form to disable broadcast storm control. Syntax switchport broadcast octet-rate rate no switchport broadcast rate - Threshold level as a rate; i.e., kilobits per second.
4 Interface Commands Command Mode Privileged Exec Command Usage Statistics are only initialized for a power reset. This command sets the base value for displayed statistics to zero for the current management session. However, if you log out and back into the management interface, the statistics displayed will show the absolute value accumulated since the last power reset. Example The following example clears statistics on port 5.
4 Command Line Interface Example Console#show interfaces status ethernet 1/5 Information of Eth 1/5 Basic information: Port type: 100TX Mac address: 00-12-CF-12-34-61 Configuration: Name: Port admin: Up Speed-duplex: Auto Capabilities: 10half, 10full, 100half, 100full, Broadcast storm: Enabled Broadcast storm limit: 500 packets/second Flow control: Disabled Lacp: Disabled Port security: Disabled Max MAC count: 0 Port security action: None Current status: Link status: Up Port operation status: Up Operation
4 Interface Commands Example Console#show interfaces counters ethernet 1/7 Ethernet 1/7 Iftable stats: Octets input: 30658, Octets output: 196550 Unicast input: 6, Unicast output: 5 Discard input: 0, Discard output: 0 Error input: 0, Error output: 0 Unknown protos input: 0, QLen output: 0 Extended iftable stats: Multi-cast input: 0, Multi-cast output: 3064 Broadcast input: 262, Broadcast output: 1 Ether-like stats: Alignment errors: 0, FCS errors: 0 Single Collision frames: 0, Multiple collision frames: 0
4 Command Line Interface Example This example shows the configuration setting for port 24.
Mirror Port Commands 4 Mirror Port Commands This section describes how to mirror traffic from a source port to a target port. Table 4-44 Command Mirror Port Commands Function Mode Page port monitor Configures a mirror session IC 4-127 show port monitor Shows the configuration for a mirror port PE 4-128 port monitor This command configures a mirror session. Use the no form to clear a mirror session.
4 Command Line Interface Example The following example configures the switch to mirror received packets from port 6 to 11: Console(config)#interface ethernet 1/11 Console(config-if)#port monitor ethernet 1/6 rx Console(config-if)# show port monitor This command displays mirror information. Syntax show port monitor [interface] interface - ethernet unit/port (source port) • unit - Stack unit. (Range: Unit 1) • port - Port number. (Range: 1-26) Default Setting Shows all sessions.
Rate Limit Commands 4 Rate Limit Commands This function allows the network manager to control the maximum rate for traffic received on an interface. Rate limiting is configured on interfaces at the edge of a network to limit traffic into or out of the network. Traffic that falls within the rate limit is transmitted, while packets that exceed the acceptable amount of traffic are dropped. Rate limiting can be applied to individual ports or trunks.
4 Command Line Interface Link Aggregation Commands Ports can be statically grouped into an aggregate link (i.e., trunk) to increase the bandwidth of a network connection or to ensure fault recovery. Or you can use the Link Aggregation Control Protocol (LACP) to automatically negotiate a trunk link between this switch and another network device. For static trunks, the switches have to comply with the Cisco EtherChannel standard. For dynamic trunks, the switches have to comply with LACP.
4 Link Aggregation Commands Guidelines for Creating Trunks General Guidelines – • Finish configuring port trunks before you connect the corresponding network cables between switches to avoid creating a loop. • A trunk can have up to eight ports. • The ports at both ends of a connection must be configured as trunk ports. • All ports in a trunk must be configured in an identical manner, including communication mode (i.e., speed, duplex mode and flow control), VLAN assignments, and CoS settings.
4 Command Line Interface Example The following example creates trunk 1 and then adds port 11: Console(config)#interface port-channel 1 Console(config-if)#exit Console(config)#interface ethernet 1/11 Console(config-if)#channel-group 1 Console(config-if)# lacp This command enables 802.3ad Link Aggregation Control Protocol (LACP) for the current interface. Use the no form to disable it.
Link Aggregation Commands 4 Example The following shows LACP enabled on ports 11-13. Because LACP has also been enabled on the ports at the other end of the links, the show interfaces status port-channel 1 command shows that Trunk 1 has been established.
4 Command Line Interface Command Mode Interface Configuration (Ethernet) Command Usage • Port must be configured with the same system priority to join the same LAG. • System priority is combined with the switch’s MAC address to form the LAG identifier. This identifier is used to indicate a specific LAG during LACP negotiations with other systems. • Once the remote side of a link has been established, LACP operational settings are already in use on that side.
Link Aggregation Commands 4 • Once the remote side of a link has been established, LACP operational settings are already in use on that side. Configuring LACP settings for the partner only applies to its administrative state, not its operational state, and will only take effect the next time an aggregate link is established with the partner.
4 Command Line Interface lacp port-priority This command configures LACP port priority. Use the no form to restore the default setting. Syntax lacp {actor | partner} port-priority priority no lacp {actor | partner} port-priority • actor - The local side an aggregate link. • partner - The remote side of an aggregate link. • priority - LACP port priority is used to select a backup link.
4 Link Aggregation Commands Default Setting Port Channel: all Command Mode Privileged Exec Example Console#show lacp 1 counters Port channel : 1 ------------------------------------------------------------------------Eth 1/ 1 ------------------------------------------------------------------------LACPDUs Sent : 21 LACPDUs Received : 21 Marker Sent : 0 Marker Received : 0 LACPDUs Unknown Pkts : 0 LACPDUs Illegal Pkts : 0 . . .
4 Command Line Interface Table 4-48 show lacp internal - display description Field Description Oper Key Current operational value of the key for the aggregation port. Admin Key Current administrative value of the key for the aggregation port. LACPDUs Internal Number of seconds before invalidating received LACPDU information. LACP System Priority LACP system priority assigned to this port channel. LACP Port Priority LACP port priority assigned to this interface within the channel group.
Link Aggregation Commands Table 4-49 Field 4 show lacp neighbors - display description Description Partner Admin System ID LAG partner’s system ID assigned by the user. Partner Oper System ID LAG partner’s system ID assigned by the LACP protocol. Partner Admin Port Number Current administrative value of the port number for the protocol Partner. Partner Oper Port Number Operational port number assigned to this aggregation port by the port’s protocol partner.
4 Command Line Interface Address Table Commands These commands are used to configure the address table for filtering specified addresses, displaying current entries, clearing the table, or setting the aging time.
4 Address Table Commands Command Usage The static address for a host device can be assigned to a specific port within a specific VLAN. Use this command to add static addresses to the MAC Address Table. Static addresses have the following characteristics: • Static addresses will not be removed from the address table when a given interface link is down. • Static addresses are bound to the assigned interface and will not be moved.
4 Command Line Interface • sort - Sort by address, vlan or interface. Default Setting None Command Mode Privileged Exec Command Usage • The MAC Address Table contains the MAC addresses associated with each interface.
Address Table Commands 4 Example Console(config)#mac-address-table aging-time 100 Console(config)# show mac-address-table aging-time This command shows the aging time for entries in the address table. Default Setting None Command Mode Privileged Exec Example Console#show mac-address-table aging-time Aging time: 100 sec.
4 Command Line Interface Spanning Tree Commands This section includes commands that configure the Spanning Tree Algorithm (STA) globally for the switch, and commands that configure STA for the selected interface.
4 Spanning Tree Commands spanning-tree This command enables the Spanning Tree Algorithm globally for the switch. Use the no form to disable it. Syntax [no] spanning-tree Default Setting Spanning tree is enabled. Command Mode Global Configuration Command Usage The Spanning Tree Algorithm (STA) can be used to detect and disable network loops, and to provide backup links between switches, bridges or routers.
4 Command Line Interface members may be inadvertently disabled to prevent network loops, thus isolating group members. When operating multiple VLANs, we recommend selecting the MSTP option. • Rapid Spanning Tree Protocol RSTP supports connections to either STP or RSTP nodes by monitoring the incoming protocol messages and dynamically adjusting the type of protocol messages the RSTP node transmits, as described below: - STP Mode – If the switch receives an 802.
4 Spanning Tree Commands Command Usage This command sets the maximum time (in seconds) the root device will wait before changing states (i.e., discarding to learning to forwarding). This delay is required because every device must receive information about topology changes before it starts to forward frames. In addition, each port needs time to listen for conflicting information that would make it return to the discarding state; otherwise, temporary data loops might result.
4 Command Line Interface spanning-tree max-age This command configures the spanning tree bridge maximum age globally for this switch. Use the no form to restore the default. Syntax spanning-tree max-age seconds no spanning-tree max-age seconds - Time in seconds. (Range: 6-40 seconds) The minimum value is the higher of 6 or [2 x (hello-time + 1)]. The maximum value is the lower of 40 or [2 x (forward-time - 1)].
Spanning Tree Commands 4 Default Setting 32768 Command Mode Global Configuration Command Usage Bridge priority is used in selecting the root device, root port, and designated port. The device with the highest priority (i.e., lower numeric value) becomes the STA root device. However, if all devices have the same priority, the device with the lowest MAC address will then become the root device.
4 Command Line Interface spanning-tree transmission-limit This command configures the minimum interval between the transmission of consecutive RSTP/MSTP BPDUs. Use the no form to restore the default. Syntax spanning-tree transmission-limit count no spanning-tree transmission-limit count - The transmission limit in seconds. (Range: 1-10) Default Setting 3 Command Mode Global Configuration Command Usage This command limits the maximum transmission rate for BPDUs.
4 Spanning Tree Commands mst vlan This command adds VLANs to a spanning tree instance. Use the no form to remove the specified VLANs. Using the no form without any VLAN parameters to remove all VLANs. Syntax [no] mst instance_id vlan vlan-range • instance_id - Instance identifier of the spanning tree. (Range: 0-4094) • vlan-range - Range of VLANs. (Range: 1-4094) Default Setting none Command Mode MST Configuration Command Usage • Use this command to group VLANs into spanning tree instances.
4 Command Line Interface Default Setting 32768 Command Mode MST Configuration Command Usage • MST priority is used in selecting the root bridge and alternate bridge of the specified instance. The device with the highest priority (i.e., lowest numerical value) becomes the MSTI root device. However, if all devices have the same priority, the device with the lowest MAC address will then become the root device.
Spanning Tree Commands 4 revision This command configures the revision number for this multiple spanning tree configuration of this switch. Use the no form to restore the default. Syntax revision number number - Revision number of the spanning tree. (Range: 0-65535) Default Setting 0 Command Mode MST Configuration Command Usage The MST region name (page 4-152) and revision number are used to designate a unique MST region. A bridge (i.e.
4 Command Line Interface specify the maximum number of bridges that will propagate a BPDU. Each bridge decrements the hop count by one before passing on the BPDU. When the hop count reaches zero, the message is dropped. Example Console(config-mstp)#max-hops 30 Console(config-mstp)# spanning-tree spanning-disabled This command disables the spanning tree algorithm for the specified interface. Use the no form to reenable the spanning tree algorithm for the specified interface.
4 Spanning Tree Commands • Fast Ethernet – half duplex: 200,000; full duplex: 100,000; trunk: 50,000 • Gigabit Ethernet – full duplex: 10,000; trunk: 5,000 • 10 Gigabit Ethernet – full duplex: 1000; trunk: 500 Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • This command is used by the Spanning Tree Algorithm to determine the best path between devices.
4 Command Line Interface Related Commands spanning-tree cost (4-154) spanning-tree edge-port This command specifies an interface as an edge port. Use the no form to restore the default. Syntax [no] spanning-tree edge-port Default Setting Disabled Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • You can enable this option if an interface is attached to a LAN segment that is at the end of a bridged LAN or to an end node.
Spanning Tree Commands 4 Command Usage • This command is used to enable/disable the fast spanning-tree mode for the selected port. In this mode, ports skip the Discarding and Learning states, and proceed straight to Forwarding. • Since end-nodes cannot cause forwarding loops, they can be passed through the spanning tree state changes more quickly than allowed by standard convergence time.
4 Command Line Interface • RSTP only works on point-to-point links between two bridges. If you designate a port as a shared link, RSTP is forbidden. Since MSTP is an extension of RSTP, this same restriction applies. Example Console(config)#interface ethernet ethernet 1/5 Console(config-if)#spanning-tree link-type point-to-point spanning-tree mst cost This command configures the path cost on a spanning instance in the Multiple Spanning Tree. Use the no form to restore the default.
Spanning Tree Commands 4 Example Console(config)#interface ethernet ethernet 1/5 Console(config-if)#spanning-tree mst 1 cost 50 Console(config-if)# Related Commands spanning-tree mst port-priority (4-159) spanning-tree mst port-priority This command configures the interface priority on a spanning instance in the Multiple Spanning Tree. Use the no form to restore the default.
4 Command Line Interface spanning-tree protocol-migration This command re-checks the appropriate BPDU format to send on the selected interface. Syntax spanning-tree protocol-migration interface interface • ethernet unit/port - unit - Stack unit. (Range: 1-8) - port - Port number.
Spanning Tree Commands 4 Command Usage • Use the show spanning-tree command with no parameters to display the spanning tree configuration for the switch for the Common Spanning Tree (CST) and for every interface in the tree. • Use the show spanning-tree interface command to display the spanning tree configuration for an interface within the Common Spanning Tree (CST).
4 Command Line Interface --------------------------------------------------------------Eth 1/ 1 information --------------------------------------------------------------Admin status: enable Role: root State: forwarding External admin path cost: 10000 Internal admin cost: 10000 External oper path cost: 10000 Internal oper path cost: 10000 Priority: 128 Designated cost: 200000 Designated port: 128.24 Designated root: 32768.0.0000ABCD0000 Designated bridge: 32768.0.
VLAN Commands 4 VLAN Commands A VLAN is a group of ports that can be located anywhere in the network, but communicate as though they belong to the same physical segment. This section describes commands used to create VLAN groups, add port members, specify how VLAN tagging is used, and enable automatic VLAN registration for the selected interface.
4 Command Line Interface bridge-ext gvrp This command enables GVRP globally for the switch. Use the no form to disable it. Syntax [no] bridge-ext gvrp Default Setting Disabled Command Mode Global Configuration Command Usage GVRP defines a way for switches to exchange VLAN information in order to register VLAN members on ports across the network. This function should be enabled to permit automatic VLAN registration, and to support VLANs which extend beyond the local switch.
VLAN Commands 4 switchport gvrp This command enables GVRP for a port. Use the no form to disable it. Syntax [no] switchport gvrp Default Setting Disabled Command Mode Interface Configuration (Ethernet, Port Channel) Example Console(config)#interface ethernet 1/6 Console(config-if)#switchport gvrp Console(config-if)# show gvrp configuration This command shows if GVRP is enabled. Syntax show gvrp configuration [interface] interface • ethernet unit/port - unit - Stack unit.
4 Command Line Interface garp timer This command sets the values for the join, leave and leaveall timers. Use the no form to restore the timers’ default values. Syntax garp timer {join | leave | leaveall} timer_value no garp timer {join | leave | leaveall} • {join | leave | leaveall} - Which timer to set. • timer_value - Value of timer.
VLAN Commands 4 Syntax show garp timer [interface] interface • ethernet unit/port - unit - Stack unit. (Range: Unit 1) - port - Port number. (Range: 1-26) • port-channel channel-id (Range: 1-4) Default Setting Shows all GARP timers.
4 Command Line Interface Command Usage • Use the VLAN database command mode to add, change, and delete VLANs. After finishing configuration changes, you can display the VLAN settings by entering the show vlan command. • Use the interface vlan command mode to define the port membership mode and add or remove ports from a VLAN. The results of these commands are written to the running-configuration file, and you can display this file by entering the show running-config command.
4 VLAN Commands Example The following example adds a VLAN, using VLAN ID 105 and name RD5. The VLAN is activated by default.
4 Command Line Interface Example The following example shows how to set the interface configuration mode to VLAN 1, and then assign an IP address to the VLAN: Console(config)#interface vlan 1 Console(config-if)#ip address 192.168.1.254 255.255.255.0 Console(config-if)# Related Commands shutdown (4-121) switchport mode This command configures the VLAN membership mode for a port. Use the no form to restore the default.
VLAN Commands 4 switchport acceptable-frame-types This command configures the acceptable frame types for a port. Use the no form to restore the default. Syntax switchport acceptable-frame-types {all | tagged} no switchport acceptable-frame-types • all - The port accepts all frames, tagged or untagged. • tagged - The port only receives tagged frames.
4 Command Line Interface Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • Ingress filtering only affects tagged frames. • With ingress filtering enabled, a port will discard received frames tagged for VLANs for it which it is not a member. • Ingress filtering does not affect VLAN independent BPDU frames, such as GVRP or STA. However, they do affect VLAN dependent BPDU frames, such as GMRP.
VLAN Commands 4 switchport allowed vlan This command configures VLAN groups on the selected interface. Use the no form to restore the default. Note: Each port can only have one untagged VLAN. If a second VLAN is defined for a port as untagged, the other VLAN that had untagged status will automatically be changed to tagged. Setting a VLAN untagged will also change the native VLAN of the port to this VLAN.
4 Command Line Interface Example The following example shows how to add VLANs 1, 2, 5 and 6 to the allowed list as tagged VLANs for port 1: Console(config)#interface ethernet 1/1 Console(config-if)#switchport allowed vlan add 1,2,5,6 tagged Console(config-if)# switchport forbidden vlan This command configures forbidden VLANs. Use the no form to remove the list of forbidden VLANs.
4 VLAN Commands Displaying VLAN Information Table 4-57 Show VLAN Commands Command Function Mode Page show vlan Shows VLAN information NE, PE 4-175 show interfaces status vlan Displays status for the specified VLAN interface NE, PE 4-123 show interfaces switchport Displays the administrative and operational status of an interface NE, PE 4-125 show vlan This command shows VLAN information.
4 Command Line Interface Configuring IEEE 802.1Q Tunneling IEEE 802.1Q tunneling (QinQ tunneling) uses a single Service Provider VLAN (SPVLAN) for customers who have multiple VLANs. Customer VLAN IDs are preserved and traffic from different customers is segregated within the service provider’s network even when they use the same customer-specific VLAN IDs.
4 VLAN Commands Default Setting Disabled Command Mode Global Configuration Command Usage QinQ tunnel mode must be enabled on the switch for QinQ interface settings to be functional. Example Console(config)#dot1q-tunnel system-tunnel-control Console(config)# Related Commands show dot1q-tunnel (4-178) show interfaces switchport (4-125) switchport dot1q-tunnel mode This command configures an interface as a QinQ tunnel port. Use the no form to disable QinQ on the interface.
4 Command Line Interface switchport dot1q-tunnel tpid This command sets the Tag Protocol Identifier (TPID) value of a tunnel port. Use the no form to restore the default setting. Syntax switchport dot1q-tunnel tpid tpid no switchport dot1q-tunnel tpid tpid – Sets the ethertype value for 802.1Q encapsulation. This identifier is used to select a nonstandard 2-byte ethertype to identify 802.1Q tagged frames. The standard ethertype value is 0x8100.
4 VLAN Commands Example Console(config)#dot1q-tunnel system-tunnel-control Console(config)#interface ethernet 1/1 Console(config-if)#switchport dot1q-tunnel mode access Console(config-if)#interface ethernet 1/2 Console(config-if)#switchport dot1q-tunnel mode uplink Console(config-if)#end Console#show dot1q-tunnel Current double-tagged status of the system is Enabled The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100. The dot1q-tunnel 0x8100.
4 Command Line Interface • up-link - Sepcifies an uplink interface. • down-link - Sepcifies a downlink interface. Default Setting No private VLANs are defined. Command Mode Global Configuration Command Usage • A private VLAN provides port-based security and isolation between ports within the VLAN. Data traffic on the downlink ports can only be forwarded to, and from, the uplink port. • Private VLANs and normal VLANs can exist simultaneously within the same switch.
4 VLAN Commands Configuring Protocol-based VLANs The network devices required to support multiple protocols cannot be easily grouped into a common VLAN. This may require non-standard devices to pass traffic between different VLANs in order to encompass all the devices participating in a specific protocol. This kind of configuration deprives users of the basic benefits of VLANs, including security and easy accessibility.
4 Command Line Interface • protocol - Protocol type. The only option for the llc_other frame type is ipx_raw. The options for all other frames types include: ip, arp, rarp, and user-defined (0801-FFFF hexadecimal). Default Setting No protocol groups are configured.
VLAN Commands 4 - If the frame is untagged but the protocol type does not match, the frame is forwarded to the default VLAN for this interface. Example The following example maps the traffic entering Port 1 which matches the protocol type specified in protocol group 1 to VLAN 2. Console(config)#interface ethernet 1/1 Console(config-if)#protocol-vlan protocol-group 1 vlan 2 Console(config-if)# show protocol-vlan protocol-group This command shows the frame and protocol type associated with protocol groups.
4 Command Line Interface Command Mode Privileged Exec Example This shows that traffic entering Port 1 that matches the specifications for protocol group 1 will be mapped to VLAN 2: Console#show interfaces protocol-vlan protocol-group Port ProtocolGroup ID Vlan ID ---------- ------------------ ----------Eth 1/1 1 vlan2 Console# Priority Commands The commands described in this section allow you to specify which data packets have greater precedence when traffic is buffered in the switch due to congestion.
4 Priority Commands queue mode This command sets the queue mode to strict priority or Weighted Round-Robin (WRR) for the class of service (CoS) priority queues. Use the no form to restore the default value. Syntax queue mode {strict | wrr} no queue mode • strict - Services the egress queues in sequential order, transmitting all traffic in the higher priority queues before servicing lower priority queues.
4 Command Line Interface Default Setting The priority is not set, and the default value for untagged frames received on the interface is zero. Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • The precedence for priority mapping is IP DSCP, and default switchport priority. • The default priority applies for an untagged frame received on a port set to accept all frame types (i.e, receives both untagged and tagged frames). This priority does not apply to IEEE 802.
4 Priority Commands Command Usage WRR controls bandwidth sharing at the egress port by defining scheduling weights. Example This example shows how to assign WRR weights to priority queues 0 - 2: Console(config)#queue bandwidth 6 9 12 Console(config)# Related Commands show queue bandwidth (4-188) queue cos-map This command assigns class of service (CoS) values to the priority queues (i.e., hardware output queues 0 - 3). Use the no form set the CoS map to the default values.
4 Command Line Interface Command Usage • CoS values assigned at the ingress port are also used at the egress port.
Priority Commands 4 Example Console#show queue bandwidth Queue ID Weight -------- -----0 1 1 2 2 4 3 8 Console# show queue cos-map This command shows the class of service priority map. Syntax show queue cos-map [interface] interface • ethernet unit/port - unit - Stack unit. (Range: Unit 1) - port - Port number.
4 Command Line Interface Syntax [no] map ip dscp Default Setting Disabled Command Mode Global Configuration Command Usage • The precedence for priority mapping is IP DSCP, and default switchport priority. Example The following example shows how to enable IP DSCP mapping globally: Console(config)#map ip dscp Console(config)# map ip dscp (Interface Configuration) This command sets IP DSCP priority (i.e., Differentiated Services Code Point priority). Use the no form to restore the default table.
Priority Commands 4 Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • The precedence for priority mapping is IP DSCP, and default switchport priority. • DSCP priority values are mapped to default Class of Service values according to recommendations in the IEEE 802.1p standard, and then subsequently mapped to the four hardware priority queues. • This command sets the IP DSCP priority for all interfaces.
4 Command Line Interface Example Console#show map ip dscp ethernet 1/1 DSCP mapping status: disabled Port DSCP COS --------- ---- --Eth 1/ 1 0 0 Eth 1/ 1 1 0 Eth 1/ 1 2 0 Eth 1/ 1 3 0 . . .
Quality of Service Commands 4 Table 4-66 Quality of Service Commands Command Function Mode Page class-map Creates a class map for a type of traffic GC 4-194 match Defines the criteria used to classify traffic CM 4-194 policy-map Creates a policy map for multiple interfaces GC 4-195 class Defines a traffic classification for the policy to act on PM 4-196 set Classifies IP traffic by setting a CoS, DSCP, or IP-precedence PM-C value in a packet 4-197 police Defines an enforcer for cla
4 Command Line Interface class-map This command creates a class map used for matching packets to the specified class, and enters Class Map configuration mode. Use the no form to delete a class map and return to Global configuration mode. Syntax [no] class-map class-map-name [match-any] • match-any - Match any condition within a class map. • class-map-name - Name of the class map.
4 Quality of Service Commands • vlan - A VLAN. (Range:1-4094) Default Setting None Command Mode Class Map Configuration Command Usage • First enter the class-map command to designate a class map and enter the Class Map configuration mode. Then use the match command to specify the fields within ingress packets that must match to qualify for this class map. • Only one match command can be entered per class map.
4 Command Line Interface Command Usage • Use the policy-map command to specify the name of the policy map, and then use the class command to configure policies for traffic that matches criteria defined in a class map. • A policy map can contain multiple class statements that can be applied to the same interface with the service-policy command (page 4-199). • You must create a Class Map (page 4-195) before assigning it to a Policy Map.
Quality of Service Commands 4 Example This example creates a policy called “rd_policy,” uses the class command to specify the previously defined “rd_class,” uses the set command to classify the service that incoming packets will receive, and then uses the police command to limit the average bandwidth to 100,000 Kbps, the burst rate to 1522 bytes, and configure the response to drop any violating packets.
4 Command Line Interface police This command defines an policer for classified traffic. Use the no form to remove a policer. Syntax [no] police rate-kbps burst-byte [exceed-action {drop | set}] • rate-kbps - Rate in kilobits per second. (Range: 1-100000 kbps or maximum port speed, whichever is lower) • burst-byte - Burst in bytes. (Range: 64-1522 bytes) • drop - Drop packet when specified rate or burst are exceeded. • set - Set DSCP service to the specified value.
Quality of Service Commands 4 service-policy This command applies a policy map defined by the policy-map command to the ingress queue of a particular interface. Use the no form to remove the policy map from this interface. Syntax [no] service-policy input policy-map-name • input - Apply to the input traffic. • policy-map-name - Name of the policy map for this interface. (Range: 1-16 characters) Default Setting No policy map is attached to an interface.
4 Command Line Interface Example Console#show class-map Class Map match-any rd_class#1 Match ip dscp 3 Class Map match-any rd_class#2 Match ip precedence 5 Class Map match-any rd_class#3 Match vlan 1 Console# show policy-map This command displays the QoS policy maps which define classification criteria for incoming traffic, and may include policers for bandwidth limitations. Syntax show policy-map [policy-map-name [class class-map-name]] • policy-map-name - Name of the policy map.
Example 4 Command Mode Privileged Exec Example Console#show policy-map interface ethernet 1/5 Service-policy rd_policy input Console# Multicast Filtering Commands This switch uses IGMP (Internet Group Management Protocol) to query for any attached hosts that want to receive a specific multicast service. It identifies the ports containing hosts requesting a service and sends data out to those ports only.
4 Command Line Interface ip igmp snooping This command enables IGMP snooping on this switch. Use the no form to disable it. Syntax [no] ip igmp snooping Default Setting Enabled Command Mode Global Configuration Example The following example enables IGMP snooping. Console(config)#ip igmp snooping Console(config)# ip igmp snooping vlan static This command adds a port to a multicast group. Use the no form to remove the port.
Multicast Filtering Commands 4 ip igmp snooping version This command configures the IGMP snooping version. Use the no form to restore the default. Syntax ip igmp snooping version {1 | 2} no ip igmp snooping version • 1 - IGMP Version 1 • 2 - IGMP Version 2 Default Setting IGMP Version 2 Command Mode Global Configuration Command Usage • All systems on the subnet must support the same version.
4 Command Line Interface • The leave-proxy feature does not function when a switch is set as the querier. Example Console(config)#ip igmp snooping leave-proxy Console(config)# ip igmp snooping immediate-leave This command enables IGMP immediate leave for specific VLAN. Use the no form to disable the feature for a VLAN.
4 Multicast Filtering Commands Example The following shows the current IGMP snooping configuration: Console#show ip igmp snooping Service status: Enabled Querier status: Enabled Leave proxy status: Disabled Query count: 10 Query interval: 100 sec Query max response time: 20 sec Router port expire time: 300 sec Immediate Leave Processing: Disabled on all VLAN IGMP snooping version: Version 2 Console# show mac-address-table multicast This command shows known multicast addresses.
4 Command Line Interface IGMP Query Commands (Layer 2) Table 4-69 IGMP Query Commands (Layer 2) Command Function ip igmp snooping querier Allows this device to act as the querier for IGMP snooping GC Mode 4-206 Page ip igmp snooping query-count Configures the query count GC 4-206 ip igmp snooping query-interval Configures the query interval GC 4-207 ip igmp snooping query-max-response-time Configures the report delay GC 4-208 ip igmp snooping router-port-expire-time Configures the qu
4 Multicast Filtering Commands Default Setting 2 times Command Mode Global Configuration Command Usage The query count defines how long the querier waits for a response from a multicast client before taking action. If a querier has sent a number of queries defined by this command, but a client has not responded, a countdown timer is started using the time defined by ip igmp snooping query-maxresponse-time.
4 Command Line Interface ip igmp snooping query-max-response-time This command configures the query report delay. Use the no form to restore the default. Syntax ip igmp snooping query-max-response-time seconds no ip igmp snooping query-max-response-time seconds - The report delay advertised in IGMP queries. (Range: 5-25) Default Setting 10 seconds Command Mode Global Configuration Command Usage • The switch must be using IGMPv2 for this command to take effect.
Multicast Filtering Commands 4 Default Setting 300 seconds Command Mode Global Configuration Command Usage The switch must use IGMPv2 for this command to take effect.
4 Command Line Interface Command Usage Depending on your network connections, IGMP snooping may not always be able to locate the IGMP querier. Therefore, if the IGMP querier is a known multicast router/switch connected over the network to an interface (port or trunk) on your router, you can manually configure that interface to join all the current multicast groups.
Multicast Filtering Commands 4 IGMP Filtering and Throttling Commands In certain switch applications, the administrator may want to control the multicast services that are available to end users. For example, an IP/TV service based on a specific subscription plan. The IGMP filtering feature fulfills this requirement by restricting access to specified multicast services on a switch port, and IGMP throttling limits the number of simultaneous multicast groups a port can join.
4 Command Line Interface • The IGMP filtering feature operates in the same manner when MVR is used to forward multicast traffic. Example Console(config)#ip igmp filter Console(config)# ip igmp profile This command creates an IGMP filter profile number and enters IGMP profile configuration mode. Use the no form to delete a profile number. Syntax [no] ip igmp profile profile-number profile-number - An IGMP filter profile number.
Multicast Filtering Commands 4 • When the access mode is set to permit, IGMP join reports are processed when a multicast group falls within the controlled range. When the access mode is set to deny, IGMP join reports are only processed when a multicast group is not in the controlled range. Example Console(config)#ip igmp profile 19 Console(config-igmp-profile)#permit Console(config-igmp-profile)# range This command specifies multicast group addresses for a profile.
4 Command Line Interface Command Mode Interface Configuration Command Usage • The IGMP filtering profile must first be created with the ip igmp profile command before being able to assign it to an interface. • Only one profile can be assigned to an interface. • A profile can also be assigned to a trunk interface. When ports are configured as trunk members, the trunk uses the filtering profile assigned to the first port member in the trunk.
Multicast Filtering Commands 4 Example Console(config)#interface ethernet 1/1 Console(config-if)#ip igmp max-group 10 Console(config-if)# ip igmp max-groups action This command sets the IGMP throttling action for an interface on the switch. Syntax ip igmp max-groups action {replace | deny} • replace - The new multicast group replaces an existing group. • deny - The new multicast group join report is dropped.
4 Command Line Interface Command Mode Privileged Exec Example Console#show ip igmp filter IGMP filter enabled onsole#show ip igmp filter interface ethernet 1/1 Ethernet 1/1 information --------------------------------IGMP Profile 19 Deny range 239.1.1.1 239.1.1.1 range 239.2.3.1 239.2.3.100 Console# show ip igmp profile This command displays IGMP filtering profiles created on the switch. Syntax show ip igmp profile [profile-number] profile-number - An existing IGMP filter profile number.
4 Multicast Filtering Commands - -port - Port number. (Range: 1-29) • port-channel channel-id (Range: 1-4) Default Setting None Command Mode Privileged Exec Command Usage Using this command without specifying an interface displays all interfaces.
4 Command Line Interface mvr (Global Configuration) This command enables Multicast VLAN Registration (MVR) globally on the switch, statically configures MVR multicast group IP address(es) using the group keyword, or specifies the MVR VLAN identifier using the vlan keyword. Use the no form of this command without any keywords to globally disable MVR. Use the no form with the group keyword to remove a specific address or range of addresses.
Multicast Filtering Commands 4 mvr (Interface Configuration) This command configures an interface as an MVR receiver or source port using the type keyword, enables immediate leave capability using the immediate keyword, or configures an interface as a static member of the MVR VLAN using the group keyword. Use the no form to restore the default settings.
4 Command Line Interface Command Usage • A port which is not configured as an MVR receiver or source port can use IGMP snooping to join or leave multicast groups using the standard rules for multicast filtering. • MVR receiver ports cannot be members of a trunk. Receiver ports can belong to different VLANs, but should not be configured as a member of the MVR VLAN. IGMP snooping can be used to allow a receiver port to dynamically join or leave multicast groups within the MVR VLAN.
4 Multicast Filtering Commands show mvr This command shows information about the global MVR configuration settings when entered without any keywords, the interfaces attached to the MVR VLAN using the interface keyword, or the multicast groups assigned to the MVR VLAN using the members keyword. Syntax show mvr [interface [interface] | members [ip-address]] • interface • ethernet unit/port - unit - Stack unit. (Range: 1) - port - Port number.
4 Command Line Interface The following displays information about the interfaces attached to the MVR VLAN: Console#show mvr interface Port Type Status ------- -------------------eth1/1 SOURCE ACTIVE/UP eth1/2 RECEIVER ACTIVE/UP eth1/5 RECEIVER INACTIVE/DOWN eth1/6 RECEIVER INACTIVE/DOWN eth1/7 RECEIVER INACTIVE/DOWN Console# Table 4-74 Immediate Leave --------------Disable Disable Disable Disable Disable show mvr interface - display description Field Description Port Shows interfaces attached to th
IP Interface Commands 4 IP Interface Commands An IP addresses may be used for management access to the switch over your network. The IP address for this switch is obtained via DHCP by default. You can manually configure a specific IP address, or direct the device to obtain an address from a BOOTP or DHCP server when it is powered on. You may also need to a establish a default gateway between this device and management stations or other devices that exist on another network segment.
4 Command Line Interface • If you select the bootp or dhcp option, IP is enabled but will not function until a BOOTP or DHCP reply has been received. Requests will be broadcast periodically by this device in an effort to learn its IP address. (BOOTP and DHCP values can include the IP address, default gateway, and subnet mask). • You can start broadcasting BOOTP or DHCP requests by entering an ip dhcp restart command, or by rebooting the switch.
4 Command Line Interface show ip redirects This command shows the default gateway configured for this device. Default Setting None Command Mode Privileged Exec Example Console#show ip redirects IP default gateway 10.1.0.254 Console# Related Commands ip default-gateway (4-224) ping This command sends ICMP echo request packets to another node on the network. Syntax ping host [size size] [count count] • host - IP address or IP alias of the host. • size - Number of bytes in a packet.
IP Source Guard Commands 4 Example Console#ping 10.1.0.9 Type ESC to abort. PING to 10.1.0.9, by 5 32-byte payload ICMP packets, timeout is 5 seconds response time: 10 ms response time: 10 ms response time: 10 ms response time: 10 ms response time: 10 ms Ping statistics for 10.1.0.
4 Command Line Interface Syntax ip source-guard {sip | sip-mac} no ip source-guard • sip - Filters traffic based on IP addresses stored in the binding table. • sip-mac - Filters traffic based on IP addresses and corresponding MAC addresses stored in the binding table.
IP Source Guard Commands 4 is static IP source guard binding, static DHCP snooping binding or dynamic DHCP snooping binding, the packet will be forwarded. - If IP source guard if enabled on an interface for which IP source bindings (dynamically learned via DHCP snooping or manually configured) are not yet configured, the switch will drop all IP traffic on that port, except for DHCP packets. Example This example enables IP source guard on port 5.
4 Command Line Interface table, or static addresses configured in the source guard binding table with this command. • Static bindings are processed as follows: - If there is no entry with same VLAN ID and MAC address, a new entry is added to binding table using the type of static IP source guard binding. - If there is an entry with same VLAN ID and MAC address, and the type of entry is static IP source guard binding, then the new entry will replace the old one.
4 DHCP Snooping Commands Example Console#show ip source-guard binding MacAddress IpAddress Lease(sec) Type VLAN Interface ----------------- --------------- ---------- -------------------- ---- ---11-22-33-44-55-66 192.168.0.99 0 Static 1 Eth 1/5 Console# DHCP Snooping Commands DHCP snooping allows a switch to protect a network from rogue DHCP servers or other devices which send port-related information to a DHCP server. This information can be useful in tracking an IP address back to a physical port.
4 Command Line Interface • • • • • • 4-232 firewall. When DHCP snooping is enabled globally by this command, and enabled on a VLAN interface by the ip dhcp snooping vlan command (page 4-233), DHCP messages received on an untrusted interface (as specified by the no ip dhcp snooping trust command, page 4-234) from a device not listed in the DHCP snooping table will be dropped. When enabled, DHCP messages entering an untrusted interface are filtered based upon dynamic entries learned via DHCP snooping.
DHCP Snooping Commands 4 receives an ACK message from a DHCP server. Also, when the switch sends out DHCP client packets for itself, no filtering takes place. However, when the switch receives any messages from a DHCP server, any packets received from untrusted ports are dropped. Example This example enables DHCP snooping globally for the switch.
4 Command Line Interface Related Commands ip dhcp snooping (4-231) ip dhcp snooping trust (4-234) ip dhcp snooping trust This command configures the specified interface as trusted. Use the no form to restore the default setting. Syntax [no] ip dhcp snooping trust Default Setting All interfaces are untrusted Command Mode Interface Configuration (Ethernet, Port Channel) Command Usage • An untrusted interface is an interface that is configured to receive messages from outside the network or firewall.
DHCP Snooping Commands 4 ip dhcp snooping verify mac-address This command verifies the client’s hardware address stored in the DHCP packet against the source MAC address in the Ethernet header. Use the no form to disable this function.
4 Command Line Interface identified by the switch port to which they are connected rather than just their MAC address. DHCP client-server exchange messages are then forwarded directly between the server and client without having to flood them to the entire VLAN. • DHCP snooping must be enabled on the switch for the DHCP Option 82 information to be inserted into packets. Example This example enables the DHCP Snooping Information Option.
Switch Cluster Commands 4 show ip dhcp snooping This command shows the DHCP snooping configuration settings. Command Mode Privileged Exec Example Console#show ip dhcp snooping Global DHCP Snooping status: disable DHCP Snooping is configured on the following VLANs: 1 Verify Source Mac-Address: enable Interface ---------Eth 1/1 Eth 1/2 Eth 1/3 Eth 1/4 Eth 1/5 Trusted ---------No No No No Yes show ip dhcp snooping binding This command shows the DHCP snooping binding table entries.
4 Command Line Interface Table 4-79 Switch Cluster Commands Command Function Mode cluster ip-pool Sets the cluster IP address pool for Members GC cluster member Sets Candidate switches as cluster members GC 4-240 rcommand Provides configuration access to Member switches GC 4-240 show cluster Displays the switch clustering status PE 4-241 show cluster members Displays current cluster Members show cluster candidates Displays current cluster Candidates in the network Page 4-239 PE 4-24
4 Switch Cluster Commands cluster commander This command enables the switch as a cluster Commander. Use the no form to disable the switch as cluster Commander. Syntax [no] cluster commander Default Setting Disabled Command Mode Global Configuration Command Usage • Once a switch has been configured to be a cluster Commander, it automatically discovers other cluster-enabled switches in the network.
4 Command Line Interface • You cannot change the cluster IP pool when the switch is currently in Commander mode. Commander mode must first be disabled. Example Console(config)#cluster ip-pool 10.2.3.4 Console(config)# cluster member This command configures a Candidate switch as a cluster Member. Use the no form to remove a Member switch from the cluster. Syntax cluster member mac-address id no cluster member id mac-address - The MAC address of the Candidate switch.
Switch Cluster Commands 4 Example Vty-0#rcommand id 1 CLI session with the TL-SG5426 is opened. To end the CLI session, enter [Exit]. Vty-0# show cluster This command shows the switch clustering configuration. Command Mode Privileged Exec Example Console#show cluster Role: Interval heartbeat: Heartbeat loss count: Number of Members: Number of Candidates: Console# commander 30 3 1 2 show cluster members This command shows the current switch cluster members.
4 Command Line Interface show cluster candidates This command shows the discovered Candidate switches in the network.
Appendix A: Software Specifications Software Features Authentication Local, RADIUS, TACACS, Port (802.1X), HTTPS, SSH, Port Security Access Control Lists 128 ACLS (96 MAC rules, 96 IP rules) DHCP Client Port Configuration 100BASE-TX: 10/100 Mbps, half/full duplex 1000BASE-T: 10/100 Mbps at half/full duplex, 1000 Mbps at full duplex 1000BASE-SX/LX/ZX - 1000 Mbps at full duplex (SFP) Flow Control Full Duplex: IEEE 802.
A Software Specifications Quality of Service DiffServ supports class maps, policy maps, and service policies Additional Features BOOTP client SNTP (Simple Network Time Protocol) SNMP (Simple Network Management Protocol) RMON (Remote Monitoring, groups 1,2,3,9) SMTP Email Alerts DHCP Snooping IP Source Guard Switch Clustering Management Features In-Band Management Telnet, Web-based HTTP or HTTPS, SNMP manager, or Secure Shell Out-of-Band Management RS-232 console port Software Loading TFTP in-band or XMod
Management Information Bases A RMON (RFC 1757 groups 1,2,3,9) SNMP (RFC 1157) SNMPv2 (RFC 2571) SNMPv3 (RFC DRAFT 3414, 3410, 2273, 3411, 3415) SNTP (RFC 2030) SSH (Version 2.
A A-4 Software Specifications
Appendix B: Troubleshooting Problems Accessing the Management Interface Table B-1 Troubleshooting Chart Symptom Action Cannot connect using Telnet, • Be sure the switch is powered up. web browser, or SNMP • Check network cabling between the management station and the switch. software • Check that you have a valid network connection to the switch and that the port you are using has not been disabled.
B Troubleshooting Using System Logs If a fault does occur, refer to the Installation Guide to ensure that the problem you encountered is actually caused by the switch. If the problem appears to be caused by the switch, follow these steps: 1. Enable logging. 2. Set the error messages reported to include all categories. 3. Designate the SNMP host that is to receive the error messages. 4. Repeat the sequence of commands or other actions that lead up to the error. 5.
Glossary Access Control List (ACL) ACLs can limit network traffic and restrict access to certain users or devices by checking each packet for certain IP or MAC (i.e., Layer 2) information. Boot Protocol (BOOTP) BOOTP is used to provide bootup information for network devices, including IP address information, the address of the TFTP server that contains the devices system files, and the name of the boot file.
Glossary GARP VLAN Registration Protocol (GVRP) Defines a way for switches to exchange VLAN information in order to register necessary VLAN members on ports along the Spanning Tree so that VLANs defined in each switch can work automatically over a Spanning Tree network.
Glossary IGMP Snooping Listening to IGMP Query and IGMP Report packets transferred between IP Multicast Routers and IP Multicast host groups to identify IP Multicast group members. IGMP Query On each subnetwork, one IGMP-capable device will act as the querier — that is, the device that asks all hosts to report on the IP multicast groups they wish to join or to which they already belong. The elected querier will be the device with the lowest IP address in the subnetwork.
Glossary Multicast Switching A process whereby the switch filters incoming multicast frames for services for which no attached host has registered, or forwards them to all ports contained within the designated multicast VLAN group. Network Time Protocol (NTP) NTP provides the mechanisms to synchronize time across the network. The time servers operate in a hierarchical-master-slave configuration in order to synchronize local clocks within the subnet and to national time standards via wire or radio.
Glossary Secure Shell (SSH) A secure replacement for remote access functions, including Telnet. SSH can authenticate users with a cryptographic key, and encrypt data connections between management clients and the switch. Simple Network Management Protocol (SNMP) The application protocol in the Internet suite of protocols which offers network management services.
Glossary Virtual LAN (VLAN) A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network. A VLAN serves as a logical workgroup with no physical barriers, and allows users to share information and resources as though located on the same LAN. XModem A protocol used to transfer files between devices. Data is grouped in 128-byte blocks and error-corrected.
IP Interface Commands 4 ip dhcp restart This command submits a BOOTP or DHCP client request. Default Setting None Command Mode Privileged Exec Command Usage • This command issues a BOOTP or DHCP client request for any IP interface that has been set to BOOTP or DHCP mode via the ip address command. • DHCP requires the server to reassign the client’s last address if available.
Index Numerics D 802.1Q tunnel 3-133, 4-176 description 3-133 interface configuration 3-138, 4-177–4-178 mode selection 3-138 TPID 3-137, 4-178 802.
Index F L firmware displaying version 3-11, 4-62 upgrading 3-18, 4-64 LACP local parameters 4-136 partner parameters 4-136 protocol message statistics 4-136 link type, STA 3-113, 3-115, 3-117, 3-119, 3-122, 4-157 logging syslog traps 4-46 to syslog servers 4-45 log-in, Web interface 3-2 logon authentication 3-46, 4-70 RADIUS client 4-73 RADIUS server 4-73 TACACS+ client 3-48, 4-77 TACACS+ server 3-48, 4-77 logon authentication, sequence 3-49, 4-71, 4-72 G GARP VLAN Registration Protocol See GVRP gateway
Index P S password, line 4-12, 4-13 passwords 2-4 administrator setting 3-46, 4-25 path cost 3-105, 3-112 method 3-109, 4-149 STA 3-105, 3-112, 4-149 port authentication 3-60, 3-67 port priority configuring 3-144, 4-184, 4-192 default ingress 3-144, 4-185 STA 3-112, 4-155 port security, configuring 3-59, 4-79 port, statistics 3-95, 4-124 ports autonegotiation 3-79, 4-118 broadcast storm threshold 3-91, 4-122 capabilities 3-79, 4-119 duplex mode 3-79, 4-117 flow control 3-79, 4-120 speed 3-79, 4-117 ports,
Index switchport mode dot1q-tunnel 4-177 system clock, setting 3-31, 4-53 system logs 3-25 system mode, normal or QinQ 3-137, 4-176 system software, downloading from server 3-18 T TACACS+, logon authentication 3-48, 4-77 throttling, IGMP 3-169 time, setting 3-31, 4-53 TPID 3-137, 4-178 traffic class weights 3-148, 4-186 trap manager 2-7, 3-34, 4-104 troubleshooting B-1 trunk configuration 3-80, 4-130 LACP 3-82, 4-132 static 3-81, 4-131 U upgrading software 3-18 user password 3-46, 4-25, 4-26 Index-4 V V
