Management Software ® AT-S41 ◆ User’s Guide FOR THE AT-8326GB FAST ETHERNET SWITCH VERSION 1.
Copyright © 2003 Allied Telesyn, Inc. 960 Stewart Drive Suite B, Sunnyvale, CA 94085 USA All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, Inc. Microsoft is a registered trademark of Microsoft Corporation, Netscape Navigator is a registered trademark of Netscape Communications Corporation.
Table of Contents Table of Contents ................................................................................................................................................................................................. 3 List of Figures ........................................................................................................................................................................................................ 8 Preface ....................................................
Telnet Management Session ............................................................................................................................................................................31 Starting a Telnet Management Session .............................................................................................................................................. 31 Quitting from a Telnet Management Session.......................................................................................
Chapter 10 Virtual LANs ..........................................................................................................................................................................................................89 VLAN Overview .....................................................................................................................................................................................................90 VLAN Modes...........................................................
Obtaining Software Updates ........................................................................................................................................................................ 144 Downloading New Management Software from a Local Management Session ....................................................................... 145 Downloading a New Management Software Image Using TFTP ....................................................................................................
Viewing or Modifying a Tagged or Untagged VLAN ............................................................................................................................ 203 Phase 1 ......................................................................................................................................................................................................... 203 Phase 2 ..................................................................................................................
List of Figures Figure 1: Connecting a Terminal or PC to the RS232 Terminal Port ................................................................................................. 28 Figure 2: AT-S41 Login Prompt - Local Management Session ............................................................................................................ 29 Figure 3: AT-S41 Main Menu - Local Management Session ..........................................................................................................
Figure 38: Port Statistics Menu .................................................................................................................................................................... Figure 39: XModem Software Upgrade Menu ....................................................................................................................................... Figure 40: Local Management Window ........................................................................................................
Preface This guide contains instructions on how configure the AT-8326GB Fast Ethernet switch using the AT-S41 management software. How This Guide is Organized This manual is divided into three sections. Section I: Overview This section reviews the different ways that you can access the AT-S41 management software and describes the stacking features of the AT8326GB switch.
AT-S41 User’s Guide Document Conventions This document uses the following conventions: Note Notes provide additional information. Warning Warnings inform you that performing or omitting a specific action may result in bodily injury. Caution Cautions inform you that performing or omitting a specific action may result in equipment damage or loss of data.
AT-S41 User’s Guide Where to Find Web-based Guides The Allied Telesyn Web site at www.alliedtelesyn.com contains PDF files of the Installation and User Guides for all Allied Telesyn products. The documents can be viewed online or downloaded onto a local workstation or server.
AT-S41 User’s Guide Contacting Allied Telesyn Technical Support This section provides Allied Telesyn contact information for technical support as well as sales or corporate information. Online Support E-mail and Telephone Support For Sales or Corporate Information You can request technical support online by accessing the Allied Telesyn Knowledge Base from the following web site: http://kb.alliedtelesyn.com.
AT-S41 User’s Guide Obtaining Management Software Updates New releases of management software for our managed products can be downloaded from the Allied Telesyn web site: http://www.alliedtelesyn.com.
Section I Overview The chapters in this section provide an overview of the AT-S41 management software on the AT-8326GB Fast Ethernet switch. They review the different methods for accessing the management software and describe the stacking features of the switch.
Chapter 1 Management Software Overview The AT-S41 management software is intended for the AT-8326GB Fast Ethernet switch. The software allows you to adjust the operating parameters of the switch.
AT-S41 User’s Guide There are four different types of management sessions that you can use to access the AT-S41 management software on an AT-8326GB Fast Ethernet switch. They are: ❑ Local Management ❑ Telnet ❑ Web Browser ❑ SNMP This chapter briefly describes each type of management session.
AT-S41 User’s Guide Local Management Session You establish a local management session with an AT-8326GB Fast Ethernet switch by connecting either a terminal or a PC with a terminal emulator program to the RS232 terminal port on the front panel of the master switch, using a null-modem cable. This type of management session is referred to as “local” because you must be physically close to the switch, such as in the wiring closet where the switch is located.
AT-S41 User’s Guide Telnet Management Session Any management workstation on your network that has the Telnet application protocol can be used to manage an AT-8326GB Fast Ethernet switch. In this guide, a Telnet management session is referred to as a remote management session because you can manage the switch from any workstation on your network that has the application protocol. You do not have to be physically near the switch.
AT-S41 User’s Guide Web Browser Management Session You can also use a Web browser to manage a switch. This is another type of remote management, just as a Telnet management session is considered remote, because any workstation on your network that has a Web browser can be used to manage an AT-8326GB stack. Note For instructions on starting a Web browser management session, refer to Starting a Web Browser Management Session on page 152.
AT-S41 User’s Guide SNMP Management Session Another way to remotely manage an AT-8326GB switch is with an SNMP management program, such as HP Openview. A familiarity with Management Information Base (MIB) objects is necessary to manage a switch with an SNMP management program, as this management method requires loading the AT-8326GB Fast Ethernet switch MIBs into the SNMP management program. For instructions, refer to your SNMP management documentation.
Chapter 2 Stacking This chapter explains the stacking features of the AT-8326GB switch.
AT-S41 User’s Guide Stacking Overview The stacking feature can make it easier for you to manage the AT8326GB switches in your network. It offers the following benefits: ❑ You can manage up to six AT-8326GB switches from one local or remote management session. All of the switches in a stack can be managed through one management session with the master switch of the stack. This eliminates the need to initiate a separate management session for each switch in your network.
AT-S41 User’s Guide Stacking and the Management Software If you are using the stacking feature of the AT-8326GB switch, the first thing that you should do before you perform any of the procedures in this guide is check to be sure that you are configuring the correct AT8326GB switch in the stack. The Stack ID of the switch being managed is displayed at the top of most of the management menus. When you start a management session on the master switch, you are by default addressing that particular switch.
Section II Local and Telnet Management The chapters in this section explain how to manage an AT-8326GB Fast Ethernet switch from a local or Telnet management session.
Chapter 3 Starting a Local or Telnet Management Session This chapter contains the procedures for starting local and Telnet management sessions on an AT-8326GB Fast Ethernet switch.
AT-S41 User’s Guide Local Management Session On the front panel of the AT-8326GB switch is an RS232 terminal port. You use this port to establish a local management session with the switch’s AT-S41 management software. A local management session is so named because you must be close to the switch, usually within a few meters, to start this type of management session. This typically means that you must be in the wiring closet where the switch is located.
AT-S41 User’s Guide Starting a Local Management Session To start a local management session, perform the following procedure: 1. Connect one end of the null modem management cable included with the switch to the RS232 Terminal Port on a master of the stack. The master switch has a Stack ID of 1. (The STACK ID LEDs on the front of the switches will tell you which is the master switch of the stack.) DE RS2 32 Figure 1 Connecting a Terminal or PC to the RS232 Terminal Port 2.
AT-S41 User’s Guide Note These are the default settings for the RS232 terminal port. They are for a DEC VT100 or ANSI terminal, or an equivalent terminal emulation program. When the terminal session starts, it displays the management software’s login prompt, as shown below. Enter the login name and password. The default login name and default password are both “manager.” AT-8326GB Management System Version 1.00F Local - Console Allied Telesyn International Corp.
AT-S41 User’s Guide Quitting from a Local Session To quit a local session, return to the Main Menu and type Q for Quit. You should always exit from a management session when you are finished managing a switch. This can prevent unauthorized individuals from making changes to a switch’s configuration should you leave your management station unattended. Note You cannot operate both a local management session and a Telnet management session on the same stack simultaneously.
AT-S41 User’s Guide Telnet Management Session You can use the Telnet application protocol from a workstation on your network to manage an AT-8326GB stack. This type of management is referred to as remote management because you do not have to be physically close to the stack to start the session, such as with a local management session. Any workstation on your network that has the Telnet application protocol can be used to manage a stack.
Chapter 4 Basic Switch Parameters This chapter contains a variety of information and procedures. It contains information about when to assign an IP address to a switch, resetting the switch, using the switch’s default settings, and more.
AT-S41 User’s Guide When Does an AT-8326GB Switch Need an IP Address? One of your first tasks as you begin to build your network will be to determine which of the switches in your network should be assigned unique IP addresses. AT-8326GB Switch Every AT-8326GB stack in your network that you want to manage remotely using the Telnet application protocol, a Web browser, or an SNMP management program must have a unique IP address.
AT-S41 User’s Guide Configuring an IP Address The procedure in this section explains how to manually assign an IP address, subnet mask, and gateway address to an AT-8326GB stack from a local or Telnet management session, as well as how to enable DHCP. If you want the stack to obtain its IP configuration from a DHCP server on your network, go to the procedure Activating DHCP on page 41. To manually set a stack’s IP address, perform the following procedure: 1.
AT-S41 User’s Guide Subnet [M]ask This command specifies a subnet mask for the stack. Default [G]ateway Address This command specifies the default router’s IP address. This address is required if you intend to remotely manage the stack from a management station that is separated from the stack by a router. Enable/Disable [D]HCP Mode This command allows you to enable and disable DHCP mode. To learn more about DHCP mode, see Activating DHCP on page 41.
AT-S41 User’s Guide Configuring System Administration Information The procedure in this section explains how to assign a name to the switch, along with other optional information, such as the name of the administrator responsible for maintaining the unit and the location of the AT-8326GB stack. To set a stack’s administration information, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2.
AT-S41 User’s Guide Note It is advised that you assign each stack a name. The names can help you identify the various stacks when you manage them and can help you avoid performing configuration procedures on the wrong stack. Set System [L]ocation This command specifies the location of the stack. This parameter is optional and may contain up to 50 characters. Set System [C]ontact Information This command allows you to specify the name of the network administrator responsible for managing the stack.
AT-S41 User’s Guide Setting the User Interface Configuration The procedure in this section explains how to set the AT-S41 user interface security features, including idle timeouts, how to enable and disable the different management session options, and how to change the login user name and password. To set a stack’s user interface configuration, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2.
AT-S41 User’s Guide the local management station after the specified period of time. This security feature can prevent unauthorized individuals from using your management station should you step away from your system while configuring a stack. The default for the console timeout value is 5 minutes.You can set the timeout for between 0 and 60 minutes.
AT-S41 User’s Guide Enable/Disable [S]NMP Agent This command allows you to disable the SNMP management feature on the stack, and so prevent individuals from managing the stack remotely using an SNMP agent. Enable/Disable [W]eb Server This command allows you to disable the Web browser management feature on the stack, and so prevent individuals from managing the stack remotely using a Web browser.
AT-S41 User’s Guide Activating DHCP This application protocol was developed to simplify network management. It is used to automatically assign IP configuration information such as an IP address, subnet mask, and, in some instances, a default gateway address to the devices on your network,. An AT-8326GB stack supports this protocol and can obtain its IP configuration information from a DHCP server on your network.
AT-S41 User’s Guide Configuring SNMP Community Strings and Trap IP Addresses To configure the SNMP community strings for the stack and to assign up to four IP addresses of management stations to receive traps from the stack, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type N to select SNMP Configuration. The SNMP Configuration Menu is displayed in Figure 7.
AT-S41 User’s Guide Enable/Disable SNMP [T]rap Receiver This command specifies the status of a trap receiver. This parameter can be set to E for enable or D to disable. [A]dd SNMP Trap Receiver This command allows you to add an SNMP trap receiver. The range is set of 1 to 4. [D]elete SNMP Trap Receiver This command deletes a specified SNMP trap receiver. [E]nable/Disable Authentication Trap This command specifies a community’s trap authentication. This parameter can be set to E for enable or D to disable.
AT-S41 User’s Guide Resetting the Management Software Default Values The procedure in this section returns all management parameters in a stack to their default values. This procedure also deletes any VLANs that you have created in the stack. Note The management software default values can be found in Appendix A on page 235. To return the management software to its default settings, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2.
AT-S41 User’s Guide Rebooting a Switch To reboot a switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2. From the Switch Tools Configuration Menu, type R to select System Reboot. The System Reboot Menu is displayed in Figure 9.
AT-S41 User’s Guide Viewing the AT-S41 Switch Information The procedure in this section explains how to display general information about the stack, including: ❑ Administration information ❑ Bootcode version number ❑ Hardware information ❑ System information, including MAC address To display the stack information, perform the following procedure: 1. From the Main Menu, type G to select General Information. The General Information Menu is displayed in Figure 10.
AT-S41 User’s Guide Ping Execution To configure the ping execution settings on the switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2. From the Switch Tools Configuration Menu, type P to select Ping Execution. The Ping Execution Menu is displayed in Figure 11. AT-8326GB Local Management System Main Menu -> Ping Execution Target IP Address: Number of Requests: Timeout Value (sec): =============== Result 0.0.0.
AT-S41 User’s Guide 4. Select one of the two ping test options by typing the corresponding bracketed letter: Execute Ping or Stop Ping. [E]xecute Ping Starts the ping process and displays ping test results. Also allows you to clean out the ping test configuration cache by typing C for Clean Ping Data. When you clean out the ping data, you will remove the ping test results from view. [S]top Ping Ends the ping process and displays ping test results gathered before the pinging was stopped.
AT-S41 User’s Guide Bootstrap Configuration The bootstrap feature allows you to download new software and configuration settings when you boot up the switch. To configure the bootstrap settings on the switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2. From the Switch Tools Configuration Menu, type B to select Bootstrap Configuration. The Bootstrap Configuration Menu is displayed in Figure 13.
AT-S41 User’s Guide Remote If you choose the remote boot load mode, the stack downloads software from a TFTP server and boots using the newly downloaded management software. Set Boot [M]ode If you are using the remote boot load mode, you need to specify how the stack should download the new management software. There are two boot mode options: DHCP and TFTP. When downloading the image: DHCP The stack will get an IP address, TFTP server IP address, and a filename from the DHCP server.
AT-S41 User’s Guide Set [F]ile Type If you selected the remote boot load mode, you can choose what kind of files the switch will download while it is booting up. There are three file type options: Image An image file is the management software for the stack. Configuration A configuration file is a file that contains all of the existing configurations and settings for a stack.
Chapter 5 Port Parameters This chapter contains procedures for viewing and changing the parameter settings for the individual ports on a stack.
AT-S41 User’s Guide Configuring Port Parameters To configure the parameter settings for a port on the stack, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type P to select Port Configuration. The Port Configuration Menu is displayed in Figure 14.
AT-S41 User’s Guide Type The port types. Ports 1-24 are 10/100Base-TX and can operate at 10/100 Mbps. Ports 25-26 are 1000Base-TX and can operate at 10/100/1000 Mbps. Link The status of the link between the port and the end node connected to the port. Possible values are: Up - indicates that a valid link exists between the port and the end node. Down - indicates that the port and the end node have not established a valid link. Status The current operating status of the port.
AT-S41 User’s Guide Possible values are: Enabled - The port is allowed to use flow control. This is the default setting for all of the ports on the stack. Disabled - The port is not configured to use flow control. Port status, mode, and flow control can be configured from the Port Configuration Menu. 3. To configure port status, type S to select the Set Status option. The following prompt is displayed: Set Status-> Enter port number> Port number is in range of 1 to 26, 0 to set all ports.
AT-S41 User’s Guide Configuring Gigabit Port Type Ports 25 and 26 can operate as either GBIC ports or as 10/100/1000 Mbps twisted pair ports. The default port type setting is twisted pair. In order to change the use of these ports from one type to another, the port type must be changed in the AT-S41 management software. To configure the gigabit port type, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2.
AT-S41 User’s Guide 6. Enter your selection. Type G to make the port a GBIC port or T to make the port a twisted pair port. The port type change is displayed immediately in the Select Giga Port Type Menu. Note When a gigabit port has been set to operate as a GBIC port instead of a twisted pair port, the port mode cannot be changed in the Port Configuration Menu. The GBIC port is in a forced 1000 Mbps fullduplex mode.
Chapter 6 Port Security This chapter contains the procedures for setting port security.
AT-S41 User’s Guide Port Security Overview The port security feature can enhance the security of your network. You can use the feature to control the number of MAC addresses learned on the ports, and so control the number of network devices that can forward frames through the stack. An AT-8326GB stack has three levels of port security: Normal (default), Limited, and Secure. You can set the security level on a per port basis. The security levels are briefly described below.
AT-S41 User’s Guide The MAC aging time is disabled under this security level. The dynamic MAC addresses learned on a port and added to the MAC address table remain in the table and are never purged, even when the end nodes are inactive.
AT-S41 User’s Guide Configuring Port Security To set a port’s security level, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type P to select Port Security Configuration. The Port Security Configuration Menu is displayed in Figure 16.
AT-S41 User’s Guide 6. Select the desired security level. ❑ To disable security on the port, type N to select Normal mode. This is the default security setting. A port operating in Normal mode does not have any restrictions on the number of MAC addresses it can learn. The port continues to learn addresses until it reaches the 254 address maximum of MAC address table. ❑ To specify a maximum number of dynamic MAC addresses each port can learn, type L to select Limited mode.
AT-S41 User’s Guide Setting a Threshold The Limited security mode lets you set a maximum number of dynamic MAC addresses a port on a switch can learn. Once the maximum number of MAC addresses have been learned by a port, frames with new source MAC addresses are discarded and are not forwarded by the port. Static MAC addresses are not included in the count of the maximum MAC addresses a port can learn.
AT-S41 User’s Guide Setting Intrusion Detection The Limited and Secure security modes let you determine how the switch responds when it receives MAC addresses in excess of its threshold. 1. Perform the procedure Configuring Port Security on page 61. 2. Type D to select Set Intrusion Detection. The following prompt is displayed: Set intrusion detection status->Enter port number > Port number is in range of 1 to 12 3. Enter the number of the port to configure. Press Enter.
Chapter 7 Port Trunking This chapter contains the procedures for configuring port trunks.
AT-S41 User’s Guide Port Trunking Overview Port trunking is an economical way for you to increase the bandwidth between an AT-8326GB switch and another network device, such as a server, router, workstation, or another Ethernet switch. A port trunk can consist of up to four 10/100 Mbps ports or two 10/100/1000 Mbps ports that have been grouped together to function as one logical path to an end node.
AT-S41 User’s Guide ❑ When cabling a trunk, the order of the connections should be maintained on both nodes. The lowest numbered port in a trunk on the switch should be connected to the lowest numbered port of the trunk on the other device, the next lowest numbered port on the switch should be connected to the next lowest numbered port on the other device, and so on. For example, assume that you are connecting a trunk between two AT-8326GB switches.
AT-S41 User’s Guide You can also use port trunks to increase the bandwidth between switches. The example in Figure 19 shows a port trunk of four data links between two AT-8326GB switches.
AT-S41 User’s Guide Creating a Port Trunk This section contains the procedure for creating a port trunk on a stack. Be sure to review the guidelines in the Port Trunking Overview on page 66 before performing this procedure. Caution Do not connect the cables to the trunk ports on the stack until after you have configured the trunk with the management software. Connecting the cables before configuring the software will create a loop in your network topology.
AT-S41 User’s Guide 3. Type I to choose Select Stack ID and enter the ID number of the switch in the stack where you want to create the port trunk. (You can skip this step to create the port trunk on the master switch, since the master switch is selected by default.) 4. From the Trunk Configuration Menu, type A to select Add Trunk Member. The following prompt is displayed: Enter trunk group number-> 5. Enter the port trunk group containing the ports you want to use in the trunk.
AT-S41 User’s Guide Deleting a Port Trunk Caution Disconnect the cables from the port trunk on the switch before performing the following procedure. Removing a port trunk without first disconnecting the cables can create loops in your network topology. Data loops can result in broadcast storms and poor network performance. To delete a port trunk, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2.
AT-S41 User’s Guide Setting Port Trunk Status To enable or disable a port trunk, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type T to select the Trunk Configuration Menu. 3. Type I to choose Select Stack ID and enter the ID number of the switch in the stack containing the port trunk you want to enable or disable. 4. From the Trunk Configuration Menu, type S to select Set Trunk Status.
Chapter 8 Port Monitoring This chapter contains the procedures for configuring port monitoring.
AT-S41 User’s Guide Port Monitoring Overview The port monitoring feature allows you to unobtrusively monitor the traffic being received and transmitted on a port on the switch by having the traffic copied to another switch port. You can connect a network analyzer to the port functioning as the monitoring port to monitor the traffic without impacting network performance or speed. Observe the following guidelines when configuring port monitoring: ❑ You can monitor only one port on a switch at a time.
AT-S41 User’s Guide Enabling Port Monitoring To enable port monitoring, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration. The Port Monitoring Configuration Menu is displayed in Figure 21.
AT-S41 User’s Guide 5. Type M to select Set Monitored Port. The following prompt is displayed: Set monitored port->Enter port number> 6. Enter the number of the port whose traffic is to be monitored. The default monitored port is Port 1. You can specify only one port to be monitored. Press Enter. The port number you have just entered is displayed under the Monitored Port heading on the Port Monitoring Configuration Menu. 7. Type E to select Enable/Disable Port Monitoring.
AT-S41 User’s Guide Modifying Port Monitoring To modify the port monitoring configuration, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration. The Port Monitoring Configuration Menu is displayed, as shown in in Figure 21. 3. To change the monitoring port, type S to select Set Monitoring Port.
AT-S41 User’s Guide Disabling Port Monitoring To disable port monitoring, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration. The Port Mirroring Menu is displayed, as shown in Figure 21 on page 75. 3. Type E to select Enable/Disable Port Monitoring. The following prompt is displayed: Enable or Disable monitoring (E/D)> 4. Type D for Disable. 5.
Chapter 9 Spanning Tree Protocol This chapter provides introductory information on the Spanning Tree Protocol (STP) and explains how to adjust the STP bridge and port parameters. The sections in this chapter include: ❑ STP Overview on page 80 ❑ Configuring a Bridge’s STP Settings on page 84 ❑ Configuring STP Port Settings on page 87 Note For detailed information on the Spanning Tree Protocol, refer to Section 4 of IEEE Std 802.1D, ISO/IEC 10038: 1993.
AT-S41 User’s Guide STP Overview The AT-8326GB Fast Ethernet switch supports the Spanning Tree Protocol, as specified in the IEEE 802.1D standard. STP can be an important part of large networks where loops, either planned or unplanned, exist in the network topology. A loop exists when two or more nodes on your network can transmit data to each other over more than one data link. A network loop can pose a danger to network performance and operability.
AT-S41 User’s Guide Finding and Resolving Redundant Paths Once the root bridge has been selected, the bridges must determine if the network contains redundant paths and, if one is found, they must select a preferred path while placing the redundant paths in a backup or blocking state.
AT-S41 User’s Guide The cost of a path is cumulative; the final cost of a path is the value of all ports between a bridge and the root bridge. If two paths have the same port cost, the preferred path is selected through port priority. This is a value that you can adjust on a per port basis on the switch. Handling Topology Changes If there is a change in the network topology due to a failure, removal, or addition of any active components, the active topology also changes.
AT-S41 User’s Guide The root bridge will periodically transmit a BPDU to determine whether there have been any changes to the network topology and to inform other bridges of topology changes. The frequency with which the root bridge sends out a BPDU is called the Hello Time. This is a value that you can set on the AT-8326GB Fast Ethernet switches. The interval is measured in seconds and the default is 2 seconds.
AT-S41 User’s Guide Configuring a Bridge’s STP Settings This section contains the procedure for configuring a bridge’s STP settings. Caution STP on a bridge is disabled by default. If you enable STP, the bridge provides default STP parameters that are adequate for most networks. Changing them without prior experience and an understanding of how STP works might have a negative effect on your network. You should consult the IEEE 802.1d standard before changing any of the STP parameters. 1.
AT-S41 User’s Guide Enable/Disable [S]TP Enables and disables STP on the switch. The default setting is disabled. Set Bridge Pr[i]ority The priority number for the bridge. This number is used in determining the root bridge for STP. The bridge with the lowest priority number is selected as the root bridge. If two or more bridges have the same priority value, the bridge with the numerically lowest MAC address becomes the root bridge.
AT-S41 User’s Guide Spanning Tree [P]ort Configuration Allows configuration of Port Priority, Path Cost, Trunk Priority, and Trunk Path Cost. Refer to the next section for instructions on how to configure these parameters.
AT-S41 User’s Guide Configuring STP Port Settings To configure the STP port parameters, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type S to select Spanning Tree Configuration. 3. From the Spanning Tree Configuration Menu, type P to select Spanning Tree Port Configuration. The Spanning Tree Port Configuration Menu is displayed in Figure 23.
AT-S41 User’s Guide Set Path [C]ost Sets the cost parameter used in deciding which port provides the lowest cost path to the root bridge for that LAN. The range is 1 to 65535. Set [T]runk Priority Sets the parameter used as a tie breaker when two or more trunk groups are determined to have equal costs to the root bridge. The default value for priority is 128. The range is 0-255.
Chapter 10 Virtual LANs This chapter contains basic information about virtual LANs (VLANs). It also contains the procedures for creating, modifying, and deleting VLANs from a local or Telnet management session.
AT-S41 User’s Guide VLAN Overview A VLAN is a group of ports on an Ethernet switch that form a logical Ethernet segment. The ports of a VLAN form an independent broadcast domain where the traffic generated by the nodes of a VLAN remains within the VLAN. With VLANs, you can segment your network through the switch’s management software and so be able to group nodes with related functions into their own separate, logical LAN segments.
AT-S41 User’s Guide But with VLANS, you can change the LAN segment assignment of an end node connected to the switch through the switch’s AT-S41 management software. VLAN memberships can be changed any time through the management software without moving the workstations physically, or having to change group memberships by moving cables from one switch port to another. Additionally, a virtual LAN can span more than one switch.
AT-S41 User’s Guide Tagged and Untagged VLAN Overview As explained in the VLAN Overview section, a VLAN consists of a group of ports on one or more Ethernet switches that form a logical Ethernet segment and an independent broadcast domain. Traffic generated by the end nodes of a VLAN remains within the VLAN and does not cross over to the end nodes of other VLANs unless there is a connection device, such as a router or Layer 3 switch.
AT-S41 User’s Guide Untagged and Tagged Ports There are two kinds of ports that you can assign to an IEEE 802.1Qcompliant VLAN: tagged ports and untagged ports. The basic difference between the two is that an untagged port can be a member of only one VLAN at a time while a tagged port can be a member of multiple VLANs. Untagged Ports When the ports on an Ethernet switch are divided into independent VLANs, the switch needs to have a mechanism for determining which ports belong to which VLANs.
AT-S41 User’s Guide explained next, where VLAN membership is determined by information within the frames themselves.) Frames received on untagged ports and lacking any VLAN identifying information are referred to as untagged frames. When a switch receives a frame on an untagged port, it first examines the PVID of the port on which the frame was received and then adds the PVID to the frame itself. It then examines the destination MAC address of the frame.
AT-S41 User’s Guide Tagged VLANs are also useful where multiple VLANs span across switches. You can use one port per switch for connecting all VLANs on the switch to another switch. The IEEE 802.1Q standard deals with how this tagging information is used to forward the traffic throughout the switch. The handling of frames tagged with VIDs coming into a port is straightforward.
AT-S41 User’s Guide Creating a Tagged or Untagged VLAN The procedure for creating a new VLAN is divided into the following phases: ❑ Phase 1: Assigning a VID and name and specifying the port members ❑ Phase 2: Converting tagged ports into untagged ports Performing Phase 1 is required whenever you create a new VLAN. Every VLAN must have a name, VID, and, of course, ports. You will need to perform Phase 2 if some or all of the ports of a VLAN will be untagged ports.
AT-S41 User’s Guide Note Check to make sure the VLAN Type is set to 802.1Q. 802.1Q is the default VLAN Type. You can create tagged and untagged VLANs only when the switch is operating in the 802.1Q mode. For instructions on how to change the switch’s VLAN mode, see Setting the VLAN Type on page 114. 3. From the VLAN Management Menu, select C for Create VLAN. The VLAN Creation Menu is displayed in Figure 25.
AT-S41 User’s Guide 6. Type N to select Set VLAN Name. The following prompt is displayed: Enter VLAN Name ->Enter VLAN Name > 7. Enter a VLAN name of up to 32 characters. Press Enter The name should reflect the function of the nodes that will be a part of the VLAN (for example, Sales or Accounting). The name can contain spaces, but not special characters, such as asterisks (*) or exclamation points (!). If the VLAN will be unique in your network, then the name should be unique as well.
AT-S41 User’s Guide However, it is important to note that, by default, all of the ports that you just added to the new VLAN are tagged ports, meaning they are shared ports. The ports are still members of their current VLANs. If you want to convert the ports into untagged ports, you must perform the procedure in Phase 2. Phase 2 This phase of creating a new VLAN converts the tagged ports that you added to the new VLAN into untagged ports.
AT-S41 User’s Guide This menu lists the ports on the switch and each port’s current PVID assignment. For example, referring to the figure above, Ports 1 to 8 on the switch all have a PVID of 1, meaning that they are untagged members of the Default VLAN, which has a VID of 1. The menu, when initially displayed, lists the PVIDs for the ports on the master switch of the stack. 3. Type I to choose Select Stack [I]D and enter the number of a switch in the stack containing a port whose PVID you need to change.
AT-S41 User’s Guide Viewing or Modifying a Tagged or Untagged VLAN There are two phases to modifying a VLAN. You might need to perform both phases or just one of them, depending on what it is you want to change in the VLAN. The phases are: ❑ Phase 1: In this phase, you can view a VLAN’s configuration, as well as change a VLAN’s name and add or remove tagged ports. ❑ Phase 2: In this phase, you can add or remove untagged ports.
AT-S41 User’s Guide The Config VLAN Member Menu for the VLAN is displayed, as shown in Figure 27. This menu contains all the current information about the VLAN.
AT-S41 User’s Guide a. Type I to choose Select Stack ID and enter the number of the switch in the stack containing ports that you want to add or remove from the VLAN. (You can skip this step if the ports are located on the master switch, since the default selection is the master switch.) b. To add tagged ports to the VLAN, type A and then specify the ports that you want to add as tagged ports to the VLAN. You can specify the ports individually (e.g., 2,3,5), as a range (e.g., 7-9), or both (e.g., 2,5,7-9).
AT-S41 User’s Guide This menu lists the ports on the switch and each port’s current PVID assignment. For example, referring to the figure above, Ports 1 to 8 on the switch all have a PVID of 1, meaning that they are untagged members of the Default VLAN, which has a VID of 1. The menu, when initially displayed, lists the PVIDs for the ports on the master switch of the stack. 4. Type I to choose Select Stack ID and enter the number of a switch in the stack containing a port whose PVID you need to change.
AT-S41 User’s Guide Deleting a Tagged or Untagged VLAN To delete a VLAN, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. 3. From the VLAN Management Menu, select D for Delete VLAN. 4. At the command prompt, enter the VLAN ID of the VLAN you would like to delete. Press Enter. The VLAN is removed from the switch.
AT-S41 User’s Guide Port-based VLAN Mode Overview The AT-8326GB switch features a special Port-based VLAN mode. This VLAN mode allows you to create VLANs that are slightly different than the tagged and untagged VLANs described earlier in this chapter. Note For those of you who are familiar with Allied Telesyn products, please note that the port-based VLAN described here is not the same as the port-based VLANs featured in our other managed switches, such as the AT-8024 Fast Ethernet switch.
AT-S41 User’s Guide Creating a Port-based VLAN To create a new port-based VLAN, perform the following procedure: Note This procedure assumes that the switch is set to the Port-based VLAN Type. For instructions on how to change the VLAN Type on the switch, refer to Setting the VLAN Type on page 114. 1. From the Main Menu, type A to select Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. The VLAN Management Menu is displayed. 3.
AT-S41 User’s Guide 5. Type I to select Set VLAN ID/Index. The following prompt is displayed: Enter VLAN ID ->Enter VLAN ID > 6. Enter a unique VLAN ID for the VLAN. Press Enter. Since the stack does not examine the VID in tagged headers of tagged frames when operating in the Port-based VLAN mode, this VID value does not need to be unique from all other VLANs in your network. It only needs to be unique from the other VLANs in the stack on which you are creating the VLAN. The value can be from 2 and 256.
AT-S41 User’s Guide Note The ports that you just added to the new VLAN are not removed from their current VLAN assignments. You must remove the ports manually from the other VLANs if you do not want them to be shared. For instructions, refer to Modifying a Port-based VLAN on page 110. You can repeat this procedure to create additional port-based VLANs.
AT-S41 User’s Guide Modifying a Port-based VLAN The following procedure explains how to change the name of a portbased VLAN, as well as add or remove ports. To modify a port-based VLAN, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. 3. From the VLAN Management Menu, select O for the Config VLAN Member option.
AT-S41 User’s Guide 5. To modify the VLAN, use the commands at the bottom of the screen. The commands are described below: [C]hange a VLAN Name This command is used to change a VLAN’s name. Type C and enter the new name at the command prompt. [M]odify Participation This command is disabled when the switch is operating in the portbased VLAN mode. [A]dd VLAN Member This command adds ports to the VLAN. Type A and then specify the ports that you want to add as members of the VLAN.
AT-S41 User’s Guide Setting GVRP Status To set the GVRP status, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. 3. From the VLAN Management Menu, select G for Set GVRP Status. The following prompt is displayed. Enable or Disable GVRP status (E/D)> E for Enable; D for Disable Type E to select Enable. The default setting is Disabled.
AT-S41 User’s Guide Resetting the VLAN Parameters to Default This command deletes all VLANs that you created. All ports are returned back to the Default VLAN. To reset the default VLAN parameters of the switch, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. 3. From the VLAN Management Menu, select R for Reset VLAN to Default. The following prompt is displayed.
AT-S41 User’s Guide Setting the VLAN Type The AT-8326GB switch can operate in either the 802.1Q VLAN mode for creating tagged and untagged VLANs or the port-based VLAN mode. Note The VLAN Type default is 802.1Q. The change the VLAN mode, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management. 3. From the VLAN Management Menu, type T to select Set VLAN Type.
Chapter 11 MAC Address Table This chapter contains the procedures for viewing the MAC address table.
AT-S41 User’s Guide MAC Address Overview Every hardware device on your network has a unique MAC address. This address is assigned to the device by the device’s manufacturer. For example, when you install a network interface card (NIC) in a computer so that you can connect it to the network, the NIC already has a MAC address assigned to it by its manufacturer. The AT-8326GB Fast Ethernet switch contains an 8 kilobyte entry MAC address table.
AT-S41 User’s Guide on which the packet was received. This prevents packets from being forwarded onto inappropriate LAN segments and increases network security. When the destination node responds, the switch adds its MAC address and port number to the table. The type of MAC address described above is referred to as a dynamic MAC address. Dynamic MAC addresses are addresses that the switch learns by examining the source MAC addresses of the frames received on the ports.
AT-S41 User’s Guide Displaying MAC Addresses To display the MAC address table, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database. The Forwarding Database Menu is displayed in Figure 31.
AT-S41 User’s Guide The management software displays the MAC addresses based on your selection. Figure 32 is an example of the Display MAC Address by MAC option, which displays both static and dynamic MAC addresses. AT-8326GB Local Management System Forwarding Database Menu -> Display MAC Address by MAC Age-Out Time: 300 Sec.
AT-S41 User’s Guide Viewing MAC Addresses by Port This section contains the procedure for viewing the dynamic MAC addresses that have been learned on a particular port. You can also use this procedure to view any static MAC addresses that have been assigned to a port. 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database. 3. From the Forwarding Database Menu, type P to select View MAC Addresses by Port.
AT-S41 User’s Guide Viewing the MAC Addresses by MAC This section contains the procedure for viewing the dynamic MAC addresses learned on the ports of a switch. They are displayed in numerical order. This procedure will also let you view all static MAC addresses that have been assigned to any port(s) on the switch. To view the MAC addresses on the switch in numerical order, perform the following procedure. 1. From the Main Menu, type B to select Basic Switch Configuration. 2.
AT-S41 User’s Guide Viewing the MAC Addresses of a VLAN The procedure in this section can be useful if you created VLANs on the switch and want to view the MAC addresses of the nodes of a particular VLAN. (This procedure is not of much value if the switch contains only the Default VLAN, in which case displaying the entire MAC address table, as explained earlier in this chapter, produces the same result.
AT-S41 User’s Guide Adding Static MAC Addresses The management software allows you to assign up to 256 static MAC addresses on an AT-8326GB Fast Ethernet switch. To add a static address to the MAC address table, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database. 3. From the Forwarding Database Menu, type S to select Static Address Table. 4.
AT-S41 User’s Guide Deleting Static MAC Addresses To delete a static MAC address, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database. 3. From the Forwarding Database menu, type S to select Static Address Table. 4. From the Static Address Table Menu, type D to Delete Entry. The following prompt is displayed: Enter MAC Address(xx:xx:xx:xx:xx:xx) > 5.
AT-S41 User’s Guide Changing the Aging Time The switch uses the aging time to delete inactive dynamic MAC addresses from the MAC address table. When the switch detects that no packets have been received from a particular MAC address in the table after the period specified by the aging time, the switch deletes the address. This prevents the table from becoming full of addresses of nodes that are no longer active. The default setting for the aging time is 300 seconds (5 minutes).
Chapter 12 Quality of Service This chapter contains the procedures for configuring the Quality of Service (QoS) feature of the AT-S41 software.
AT-S41 User’s Guide Quality of Service Overview The AT-8326GB switch supports QoS as specified in the IEEE 802.1p and 802.1Q standards. QoS can be important in network environments where there are time-critical applications, such as voice transmission or video conferencing, that can be adversely affected by packet transfer delays. Prior to QoS, network traffic was handled in a best-effort manner. File transfer delays did occur, but were mostly transparent to network users.
AT-S41 User’s Guide Configuring QoS To configure QoS on the switch, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type S to select Quality of Service Configuration. The Quality of Service Configuration Menu is displayed in Figure 33.
AT-S41 User’s Guide 6. Enter a traffic class. The following prompt is displayed, where X equals the traffic class specified in the last step. Enter queue for traffic class X> Queue is in range of 0 to 1 7. Enter a priority queue (0 - 1). Note The default setting for traffic classes 0 - 3 is the low priority queue. The default setting for traffic classes 4 - 7 is the high priority queue. All tagged frames will be directed to either the low or high priority queue as specified.
Chapter 13 IGMP Snooping This chapter explains how to activate and configure the IGMP snooping feature on the switch.
AT-S41 User’s Guide IGMP Snooping Overview The Internet Group Management Protocol (IGMP) enables routers to create lists of end nodes that want to receive multicast packets from a multicast application. The router creates a multicast membership list by periodically sending out queries to the local area networks connected to its ports. An end node wanting to become a member of a particular multicast group responds to a query by sending a report.
AT-S41 User’s Guide Activating IGMP Snooping To enable or disable IGMP snooping on the switch and to configure IGMP snooping parameters, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type I to select the IGMP Snooping Configuration. The IGMP Configuration Menu is displayed in Figure 34.
AT-S41 User’s Guide This parameter also specifies the time interval used by the switch in determining whether a multicast router is still active. The switch makes the determination by watching for queries from the router. If the switch does not detect any queries from a multicast router during the specified time interval, it assumes that the router is no longer active on the port. [V]iew Group Members Allows you to display a list of the group members of each multicast group on a switch. 3.
AT-S41 User’s Guide Viewing Group Members You can use the AT-S41 software to display a list of the members of each multicast group on a switch. To display the list, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type I to select the IGMP Snooping Configuration. 3. From the IGMP Configuration Menu, type V to select View Group Members. The following prompt is displayed: Enter VLAN ID> 4.
AT-S41 User’s Guide Group Members The port(s) on the switch to which one or more host nodes of the multicast group are connected. VLAN ID The VLAN ID of the VLAN the multicast group belongs to.
Chapter 14 Broadcast Storm Control This chapter contains the procedures for configuring the broadcast storm control feature of the AT-S41 management software.
AT-S41 User’s Guide Broadcast Storm Control Overview Most frames on an Ethernet network are unicast frames. A unicast frame is sent to a single destination. That is, the node sending a unicast frame intends the frame for a particular node on the network. For example, when a node needs to send a file to a network server for storage, the node sends the file in unicast Ethernet frames containing the destination address of the server where the file is to be stored. Broadcast frames are different.
AT-S41 User’s Guide Activating Broadcast Storm Control To activate the Broadcast Storm Control feature for the switch, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type C to select Storm Control Configuration. The Storm Configuration Menu is displayed in Figure 36.
Chapter 15 Port Statistics This chapter contains the procedure for displaying data traffic statistics.
AT-S41 User’s Guide Displaying Port Statistics To display Ethernet port statistics, perform the following procedure: 1. From the Main Menu, type S to select Statistics. The Statistics Menu is displayed in Figure 37. AT-8326GB Local Management System Main Menu -> Statistics Menu Stack ID: 1 Port: 1 Elapsed Time Since System Up: 000:02:37:12
AT-S41 User’s Guide The Statistics Menu for a selected port is displayed in Figure 37. AT-8326GB Local Management System Enter the character in square brackets to select option Main Menu -> Statistics Menu Stack ID: 1 Port: 9 Elapsed Time Since System Up: 000:01:00:30
AT-S41 User’s Guide Oversize Packets Number of packets exceeding the maximum specified by IEEE 802.3 (1518 bytes including the CRC) received on the port. Fragments Number of undersized packets, packets with alignment errors, and packets with FCS errors (CRC errors) received on the port. Jabbers Number of electrical signal errors detected on the port. Collisions Number of packet collisions on the port. 64-Byte Pkts Number of 64-byte packets sent or received by the port.
Chapter 16 Management Software Updates This chapter explains how to obtain new versions of the AT-S41 management software and how to download the software onto an AT-8326GB switch.
AT-S41 User’s Guide Obtaining Software Updates New releases of the AT-S41 management software are available from the Allied Telesyn web site at www.alliedtelesyn.com and from our FTP server at ftp.alliedtelesyn.com. To log on to the FTP server, enter “anonymous” for the user name and your email address for the password. Management software for the AT-8326GB switch will have “S41” as part of the filename.
AT-S41 User’s Guide Downloading New Management Software from a Local Management Session This section contains the procedure for downloading a new version of AT-S41 management software onto a switch from a local management session. The procedure takes approximately 7 to 10 minutes to complete. Note You cannot perform this procedure from a Telnet or Web browser management session. Caution The switch will not forward Ethernet traffic during the software download and initialization process.
AT-S41 User’s Guide The XModem Software Upgrade Menu is displayed in Figure 39. AT-8326GB Local Management System Enter the character in square brackets to select option Software Upgrade -> XModem Software Upgrade Menu Image Version/Date: 1.
AT-S41 User’s Guide The Send File pop-up window is displayed in Figure 41. Figure 41 Send File Window 9. Click the Browse button on the Send File window to specify the location of the software. 10. Click on the Protocol field and set to 1K Xmodem transfer protocol. 11. Click Send. The software immediately begins to download onto the switch’s CPU. As this process begins, the Xmodem File Send window displays current status of the software download. This process will take minutes to complete.
AT-S41 User’s Guide Downloading a New Management Software Image Using TFTP TFTP software is available from various sources and is included in SNMP which can be purchased through Allied Telesyn. A command line version is included in most UNIX variants and in Windows NT. Please consult the documentation or the manufacturer of the software used on the proper use of the software.
AT-S41 User’s Guide The TFTP Software Upgrade Menu is displayed in Figure 43. AT-8326GB Local Management System Main Menu -> Software Upgrade Menu Image Version/Date: 1.00F/Jan 15 2002 19:40:11 TFTP Server IP: Image File Name: Retry Count: 0.0.0.
AT-S41 User’s Guide The following prompt is displayed: Download file (Y/N)> 8. Type Y to select Yes. The software immediately begins to download onto the switch’s CPU. This process will take seconds to complete. Once the new software download process has completed, the switch begins to initialize the software. This process takes a few minutes. Once the initialization process is complete, the switch will automatically reboot.
Section III Web Browser Management The chapters in this section explain how to manage an AT-8326GB Fast Ethernet switch using a Web browser.
Chapter 17 Starting a Web Browser Management Session This chapter contains the procedure for starting a management session on an AT-8326GB stack using a Web browser such as Microsoft Internet Explorer or Netscape Navigator.
AT-S41 User’s Guide Starting a Web Browser Management Session This section explains how to start a Web browser management session. Note In order for you to manage an AT-8326GB stack using a Web browser, the switch must have an IP address. Initially assigning an IP address to a switch can only be done through a local management session. For instructions, refer to Configuring an IP Address on page 34. To start a Web browser management session, perform the following procedure: 1. Start your Web browser. 2.
AT-S41 User’s Guide The management software home page will appear, as displayed in Figure 45. Figure 45 Management Software Home Page This is the home page of the management software. The menu tabs are visible at the top of the home page: ❑ General Info ❑ Basic Config ❑ Advanced Config ❑ Tools ❑ Statistics Note A Web browser management session remains active even if you link to other sites. You can return to the management Web pages at any time as long as you do not close the browser window.
AT-S41 User’s Guide Browser Tools Quitting from a Web Browser Management Session You can use your browser’s bookmark feature to remember frequentlyused menu pages. To exit from a Web browser management session, close the Web browser.
Chapter 18 Basic Switch Parameters The procedures in this chapter explain how to set the following switch parameters: ❑ Configuring an IP Address on page 157 ❑ Configuring System Administration Information on page 159 ❑ Setting the User Interface Configuration on page 161 ❑ Activating DHCP on page 163 ❑ Configuring SNMP Community Strings and Trap IP Addresses on page 164 ❑ Resetting the Management Software Default Values on page 166 ❑ Rebooting a Switch on page 167 ❑ Viewing the AT-S41 Switch Information
AT-S41 User’s Guide Configuring an IP Address Note For guidelines on when to assign an IP address, subnet address, and gateway address to an AT-8326GB switch, refer to When Does an AT-8326GB Switch Need an IP Address? on page 33. The procedure in this section explains how to manually assign an IP address, subnet mask, and gateway address to the switch, as well as how to enable DHCP.
AT-S41 User’s Guide System IP Address This parameter specifies the IP address of the switch. You must specify an IP address if you intend to remotely manage the switch using a Web browser, a Telnet utility, or an SNMP management program. System Subnet Mask This parameter specifies the subnet mask for the switch. System Default Gateway This parameter specifies the default router’s IP address.
AT-S41 User’s Guide Configuring System Administration Information The procedure in this section explains how to assign a name to the switch, along with other optional information, such as the name of the administrator responsible for maintaining the unit and the location of the switch. To set a switch’s administration information, perform the following procedure: 1. Click on the Basic Config menu tab and select Admin Config from the sub-menu.
AT-S41 User’s Guide System Name This parameter specifies a name for the switch (for example, Sales). This parameter is optional and may contain up to 50 characters. Note It is advised that you assign each switch a name. The names can help you identify the various switches when you manage them and can help you avoid performing configuration procedures on the wrong switch. System Location This parameter specifies the location of the switch. This parameter is optional and may contain up to 50 characters.
AT-S41 User’s Guide Setting the User Interface Configuration The procedure in this section explains how to set the user interface or security features of the switch, including idle timeouts and how to enable and disable the different management session options. To set a switch’s user interface configuration, perform the following procedure: 1. Click on the Basic Config menu tab and select User Interface from the sub-menu. The User Interface page is displayed, as shown in Figure 48.
AT-S41 User’s Guide Telnet UI Idle Timeout This parameter causes the management software to automatically end a management session if it does not detect any activity from the remote management station after the specified period of time. This security feature can prevent unauthorized individuals from using your management station should you step away from your system while configuring a switch. The default for the Telnet timeout value is 5 minutes. You can set the timeout for between 0 and 60 minutes.
AT-S41 User’s Guide Activating DHCP This application protocol was developed to simplify network management. It is used to automatically assign IP configuration information to the devices on your network, such as an IP address, subnet mask, and, in some instances, a default gateway address. The AT-8326GB Fast Ethernet switch supports this protocol and can obtain its IP configuration information from a DHCP server on your network.
AT-S41 User’s Guide Configuring SNMP Community Strings and Trap IP Addresses To configure the SNMP community strings for the switch and to assign up to four IP addresses of management stations to receive traps from the switch, perform the following procedure: 1. Click on the Basic Config menu tab and select SNMP Config from the sub-menu. The SNMP Configuration page is displayed, as shown in Figure 49. Figure 49 SNMP Configuration Page 2. Adjust the parameters as desired.
AT-S41 User’s Guide SNMP Trap Receivers: IP Address Allows you to add up to four SNMP trap receivers. SNMP Trap Receivers: Community Allows you to add a community name for each SNMP trap receiver. Enable/Disable/Delete SNMP Trap Receiver Allows you to specify the status of a trap receiver or to delete the trap receiver. Changes to the SNMP parameters are immediately activated on the switch. 3. To restore the switch’s default SNMP settings, click the Restore button.
AT-S41 User’s Guide Resetting the Management Software Default Values The procedure in this section returns all management parameters to their default values. This procedure also deletes any VLANs that you have created on the switch. Note The management software default values can be found in Appendix A on on page 235. To return the management software to its default settings, perform the following procedure: 1. Click on the Tools menu tab and select System Reboot from the submenu.
AT-S41 User’s Guide Rebooting a Switch To reboot a switch, perform the following procedure: 1. Click on the Tools menu tab and select System Reboot from the submenu. The System Reboot Configuration page will be displayed, as shown in Figure 51. Figure 51 System Reboot Configuration 2. Select a Reboot Status of Start from the pull-down menu. The Reboot Status default setting is Stop. 3. Select a Reboot type from the pull-down menu.
AT-S41 User’s Guide Viewing the AT-S41 Switch Information The procedure in this section explains how to display general information about the switch. To display the switch information, perform the following procedure: 1. Click on the General Info menu tab and select Switch Info from the sub-menu. The Switch Information page will be displayed, as shown in Figure 52. Figure 52 Switch Information Page There are not any configuration options on this page; it is for informational purposes only.
AT-S41 User’s Guide Ping Execution To configure the ping execution settings on the switch, perform the following procedure: 1. Click on the Tools menu tab and select Ping from the sub-menu. The Ping Test Configuration page is displayed, as shown in Figure 53. Figure 53 Ping Test Configuration Page 2. Adjust the parameters as desired. To change a value, enter the new information in the data entry field. The parameters are described below.
AT-S41 User’s Guide 4. To view the ping results, click the Show Ping Results button. The Ping Test Result page is displayed, as shown in Figure 54. Figure 54 Ping Test Result Page The parameters cannot be modified on this page. They are for informational purposes only. The parameters are described below. Destination IP Address This is the IP address you entered on the Ping Test Configuration page. Pass Number of successful pings. Average Time Average length of time for each ping request. 5.
AT-S41 User’s Guide Bootstrap Configuration The bootstrap feature allows you to download new software and configuration settings when you boot up the switch. To configure the bootstrap settings on the switch, perform the following procedure: 1. Click on the Tools menu tab and select Bootstrap from the sub-menu. The Bootstrap Configuration page is displayed, as shown in Figure 55. Figure 55 Bootstrap Configuration Page 2. Adjust the parameters as desired.
AT-S41 User’s Guide Remote If you choose the remote boot load mode, the switch downloads software from a TFTP server and boots using the newly downloaded management software. Load Mode If you are using the remote boot load mode, you need to specify how the switch should download the new management software. There are two boot mode options: DHCP and TFTP.
Chapter 19 Port Parameters The procedures in this chapter allow you to view and change the parameter settings for the individual ports on a switch. Examples of port parameters that you can adjust include duplex mode and port speed.
AT-S41 User’s Guide Configuring Port Parameters To configure the parameter settings for a port on a switch, perform the following procedure: 1. Click on the Basic Config menu tab and select Port Config from the sub-menu. Choose Port Config again in the next sub-menu. The Port Configuration page will appear, as displayed in Figure 56. Figure 56 Port Configuration Page 2. Adjust the port parameter(s) that you want to configure. You can configure the parameters for only one port at a time.
AT-S41 User’s Guide Type The port types. Ports 1-24 are 10/100Base-TX and can operate at 10/100 Mbps. Ports 25-26 are 1000Base-TX and can operate at 10/100/1000 Mbps. Link Status The status of the link between the port and the end node connected to the port. Possible values are: Up - indicates that a valid link exists between the port and the end node. Down - indicates that the port and the end node have not established a valid link. Admin. Status The current operating status of the port.
AT-S41 User’s Guide Possible values are: Enabled - The port is allowed to use flow control. This is the default setting for all of the ports on the switch. Disabled - The port is not configured to use flow control. 3. Once you have made the desired changes, click the Apply button.The switch immediately activates the parameter changes on the port.
AT-S41 User’s Guide Configuring Gigabit Port Type Ports 25 and 26 can operate as either GBIC ports or 10/100/1000 Mbps twisted pair ports. The default port type setting is twisted pair. In order to change the use of these ports from one type to the other, the port type must be changed in the AT-S41 management software. To configure a gigabit port type, perform the following procedure: 1. Click on the Basic Config menu tab and select Port Config from the sub-menu.
AT-S41 User’s Guide Displaying Port Status The procedure in this section displays the operating status of the ports on a switch. To display the status of a switch port, perform the following procedure: 1. Click on the General Info menu tab and select Front Panel from the sub-menu. The Front Panel page will appear, as displayed in Figure 58. Figure 58 Front Panel Page This page displays a graphical image of the front of the switch. Ports with valid links to end nodes have a green light. 2. Click on a port.
AT-S41 User’s Guide If you select a port, the Configuration of Port page is displayed, as shown in Figure 59. Figure 59 Configuration of a Port This page displays the port’s configuration and operating status. Set the port parameters as desired and click the Apply button. The parameters are described below. Port Type The port type. Ports 1-24 are 10/100Base-TX and can operate at 10/100 Mbps. Ports 25-26 are 1000Base-TX and can operate at 10/100/1000 Mbps.
AT-S41 User’s Guide port to resume normal operation. You can also disable an unused port to secure it from unauthorized connections. Possible values are: Enabled - The port is able to send and receive Ethernet frames. This is the default setting for all of the ports on the switch. Disabled - The port has been manually disabled. Speed Mode The current operating settings of the port. Possible values are: Auto - Indicates that the port is using Auto-Negotiation to set operating speed and duplex mode.
AT-S41 User’s Guide Displaying Port Statistics The procedure in this section displays the statistics of a port on a switch. To display the statistics of a port, perform the following procedure: 1. Click on the Statistics menu tab. The Statistics page will appear, as displayed in Figure 60. Figure 60 Statistics Window 2. To view the statistics for a port, select a port in the Select Port pulldown menu. 3. Click the Apply button. The information in the Statistics Menu is for viewing purposes only.
AT-S41 User’s Guide Good Multicast Number of valid multicast packets received on the port. CRC/Align Errors Number of packets with a cyclic redundancy check (CRC) error but with the proper length (64-1518 bytes) received on the port. Undersize Packets Number of packets that were less than the minimum length specified by IEEE 802.3 (64 bytes including the CRC) received on the port. Oversize Packets Number of packets exceeding the maximum specified by IEEE 802.
Chapter 20 Port Security This chapter explains how to configure port security. Note For background information on port security, refer to the Port Security Overview on page 59.
AT-S41 User’s Guide Configuring Port Security To configure the switch’s port security, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Security from the sub-menu. Choose Security Config from the next sub-menu. The Port Security page will appear, as displayed in Figure 61. Figure 61 Port Security Page 2. Select the Stack ID for the switch whose port security you want to configure from the Stack ID pull-down menu.
AT-S41 User’s Guide 4. If you selected the Limit security mode, you can set a threshold or specific limit on the maximum number of dynamic MAC addresses the port can learn. The threshold is automatically set to 1 until you change it in the Threshold data entry field. Enter the number of dynamic MAC addresses (between 1 and 170) you want the port to be able to learn. Note A threshold cannot be set for the port if the Security Mode is set to Normal or Secure.
AT-S41 User’s Guide Displaying Port Security Settings To view the switch’s port security settings, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Security from the sub-menu. Choose Security Overview from the next sub-menu. 2. The Port Security Overview page will appear, as displayed in Figure 62, allowing you to see the security settings for all of the ports on a switch. Figure 62 Port Security Overview Page 3.
Chapter 21 Port Trunks This chapter contains the procedures for creating or deleting a port trunk using a Web browser management session. Note For background information on port trunking, refer to the Port Trunking Overview on page 66.
AT-S41 User’s Guide Creating or Deleting a Port Trunk Caution Do not connect the cables of a port trunk to the ports on the switch until after you have configured the ports on both the switch and the end node. Connecting the cables prior to configuring the ports can create loops in your network topology. Loops can result in broadcast storms, which can adversely effect the operations of your network. If you are deleting a port trunk, disconnect the cables from the ports before you delete the trunk.
AT-S41 User’s Guide 2. To create a port trunk, do the following: a. Check the ports that will make up the port trunk. A port trunk can contain up to four ports. All of the ports in a port trunk must be in the same trunk group. b. Select Enable from the pull-down menu to the right of the trunk group that contains the port trunk members. c. Click the Apply button to the right of the port trunk group you enabled. The new port trunk is immediately activated on the switch.
Chapter 22 Port Monitoring This chapter contains the procedure for enabling and disabling port monitoring. Note For background information on port monitoring, refer to Port Monitoring Overview on page 74.
AT-S41 User’s Guide Configuring Port Monitoring To enable or disable port monitoring, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Monitoring from the sub-menu. The Port Monitoring Configuration page will appear, as displayed in Figure 64. Figure 64 Port Monitoring Configuration Page 2. To configure port monitoring, do the following: a. Use the Monitoring Port pull-down menus to select the port to function as the port monitor and the stack ID for that port. b.
Chapter 23 Spanning Tree Protocol This chapter explains how to configure the STP bridge parameters on an AT-8326GB Fast Ethernet switch from a Web browser management session. Sections in the chapter include: ❑ Configuring a Bridge’s STP Settings on page 193 ❑ Configuring STP Port Settings on page 195 Note For background information on STP, refer to the STP Overview on page 80.
AT-S41 User’s Guide Configuring a Bridge’s STP Settings Caution STP on a bridge is disabled by default. If you enable STP, the bridge provides default STP parameters that are adequate for most networks. Changing them without prior experience and an understanding of how STP works might have a negative effect on your network. You should consult the IEEE 802.1d standard before changing any of the STP parameters. To configure a bridge’s STP parameters, perform the following procedure: 1.
AT-S41 User’s Guide Bridge Priority The priority number for the bridge. This number is used in determining the root bridge for STP. The bridge with the lowest priority number is selected as the root bridge. If two or more bridges have the same priority value, the bridge with the numerically lowest MAC address becomes the root bridge. When a root bridge goes off-line, the bridge with the next priority number automatically takes over as the root bridge.
AT-S41 User’s Guide Configuring STP Port Settings To display and configure the STP settings, perform the following procedure: 1. Click on the Basic Config menu tab and select Spanning Tree from the sub-menu. Choose STP Port Config from the next sub-menu. The Spanning Tree Port Configuration page will appear, as displayed in Figure 66. Figure 66 Spanning Tree Port Configuration 2.
AT-S41 User’s Guide Note Port priority cannot be set on ports that are part of a trunk group. Path Cost The spanning tree algorithm uses the cost parameter to decide which port provides the lowest cost path to the root bridge for that LAN. The default values for this parameter are 100 for a 10 Mbps port, 10 for a 100 Mbps port, and 4 for a 1 Gbps port.??? The range is 1 to 65535. The following parameters are for display purposes only and cannot be changed from the Spanning Tree Port Configuration Menu.
Chapter 24 Virtual LANs This chapter explains how to create, modify, and delete VLANs. This chapter also explains how to change a switch’s VLAN operating mode. Note For background information on VLANs, refer to Chapter 10, Virtual LANs.
AT-S41 User’s Guide Creating a Tagged or Untagged VLAN The procedure for creating a new VLAN is divided into the following phases: ❑ Phase 1: Assigning a VID and name and specifying the port members ❑ Phase 2: Converting tagged ports into untagged ports Performing Phase 1 is required whenever you create a new VLAN. Every VLAN must have a name, VID, and, of course, ports. You will need to perform Phase 2 if some or all of the ports of a VLAN will be untagged ports.
AT-S41 User’s Guide Phase 1 This phase assigns a VID and a name to your VLAN and also designates the VLAN port members. 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select Create VLAN from the next sub-menu. The Create/Modify VLAN page will appear, as displayed in Figure 67. Figure 67 Create/Modify VLAN (802.1Q VLANs) 2. Enter a VLAN ID in the VLAN ID field.
AT-S41 User’s Guide If the VLAN will be unique in your network, then the name should be unique as well. If the VLAN will be part of a larger VLAN that spans multiple switches, then the name for the VLAN should be the same on each switch where nodes of the VLAN are connected. 4. Select the Tagged port radio buttons for both the tagged and untagged ports that are to be members of the new VLAN. Do this for each switch in the stack that will contain ports for the new VLAN.
AT-S41 User’s Guide Phase 2 This phase to creating a new VLAN converts the tagged ports that you added to the new VLAN into untagged ports. This process involves changing the PVIDs of the ports so that they match the VID of the new VLAN. For example, if you assigned the new VLAN a VID of 4, you must change the PVIDs of the untagged ports to 4. The following procedure explains how this is accomplished. 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu.
AT-S41 User’s Guide For example, if you wanted to make Port 5 an untagged port of a VLAN with a VID of 7, you would change the PVID for Port 5 to the value 7. 4. Click the Apply button. Once a new PVID has been assigned to a port, the port is removed as an untagged port from its current VLAN and added to the new VLAN as an untagged port. If the port is also an tagged member of any VLANs, it remains as a tagged member of those VLANs. 5.
AT-S41 User’s Guide Viewing or Modifying a Tagged or Untagged VLAN There are two phases to modifying a VLAN. You might need to perform both phases or just one, depending on what it is you want to change in the VLAN. The phases are: ❑ Phase 1: In this phase, you can view a VLAN’s configuration, as well as change a VLAN’s name and add or remove tagged ports. ❑ Phase 2: In this phase, you can add or remove untagged ports. Phase 1 This phase explains how to display the Config VLAN Member Menu of a VLAN.
AT-S41 User’s Guide The VLAN Create/Modify page will appear, as displayed in Figure 70. Figure 70 VLAN Create/Modify (802.1Q VLANs) The rows on the page are defined below: Tagged A dot in a radio button indicates the corresponding port is a tagged member of the VLAN. For example, referring to the figure above, ports 9 and 10 on the master switch are tagged members of the VLAN. Untagged A ‘U’ for a port indicates that the port is an untagged member of the VLAN.
AT-S41 User’s Guide 3. To add a tagged port to the VLAN, click the Tagged radio button of the port. Note You cannot add untagged ports to a VLAN from this window. To add untagged ports, refer to Phase 2, below. 4. If you want to remove a tagged port from the VLAN, click the Not Member radio button of the appropriate port. Note You cannot remove untagged ports from a VLAN from this window. To remove untagged ports, refer to Phase 2, below. 5.
AT-S41 User’s Guide Phase 2 You must perform this phase whenever you need to add or remove an untagged port from a VLAN. This phase explains how to change the PVIDs of the ports so that they match the VID of a different VLAN. For example, if you want to assign Port 2 as an untagged member of a VLAN with a VID of 4, you must change the PVID of the port to 4. 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select VLAN Port Config from the next sub-menu.
AT-S41 User’s Guide For example, if you wanted to make Port 5 an untagged port of a VLAN with a VID of 7, you would change the PVID for Port 5 to the value 7. 4. Click the Apply button. Once a new PVID has been assigned to a port, the port is removed as an untagged port from its current VLAN and added to the other VLAN as an untagged port. If the port is also an tagged member of any VLANs, it remains as a tagged member of those VLANs. 5.
AT-S41 User’s Guide Deleting a Tagged or Untagged VLAN To delete a VLAN, perform the following procedure: 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select VLAN Info from the next sub-menu. The VLAN Configuration - Members page is displayed. This window lists all the VLANs that currently exist in the stack. An example of the window is shown in Figure 69 on page 203. 2. Click the Delete link in the right column for the VLAN you want to delete.
AT-S41 User’s Guide Creating a Port-based VLAN To create a port-based VLAN, perform the following procedure: Note This procedure assumes that the switch is set to the Port-based VLAN Type. For instructions on how to change the VLAN mode on the switch, refer to Setting the VLAN Type on page 213. 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select Create VLAN from the sub-menu. The Create/Modify VLAN page will appear, as displayed in Figure 72.
AT-S41 User’s Guide Note The ports that you just added to the new VLAN are not removed from their current VLAN assignments. You must remove the ports manually from the other VLANs if you do not want them to be shared. For instructions, refer to Viewing or Modifying a Portbased VLAN on page 211. Note There are two additional buttons in the bottom right-hand corner of the page. The Restore button will cancel any changes you have made to the VLAN since using the Apply button.
AT-S41 User’s Guide Viewing or Modifying a Port-based VLAN To view the configuration of a port-based VLAN or to modify a VLAN, such as to add or remove ports or to change the VLAN name, perform the following procedure: 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select VLAN Info from the next sub-menu. The VLAN Information page will appear, as displayed in Figure 73 Figure 73 VLAN Information (Port-based) This page lists the port-based VLANs in the stack. 2.
AT-S41 User’s Guide The page indicates which ports in the stack are members of the VLAN. A check in a check box indicates that the port is a VLAN member. An empty box indicates that the port is not a VLAN member. 3. To change the VLAN’s name, enter a new name in the VLAN Name text entry field. The name can be from 1 to 32 characters. The name can contain spaces, but not special characters, such as asterisks (*) or exclamation points (!).
AT-S41 User’s Guide Setting the VLAN Type An AT-8326GB stack can operate in either the 802.1Q VLAN mode for creating tagged and untagged VLANs or the port-based VLAN mode. Note The VLAN Type default is 802.1Q. To change a stack’s VLAN Type, perform the following procedure: 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select VLAN Info from the next sub-menu. The VLAN Information page will appear, as displayed in Figure 69 on page 203. 2.
Chapter 25 MAC Address Table This chapter contains instructions on how to view the dynamic and static addresses in the MAC address table of the switch.
AT-S41 User’s Guide Viewing the MAC Address by Port This section contains the procedure for viewing the dynamic MAC addresses that have been learned on a particular port. You can also use this procedure to view any static MAC addresses that have been assigned to a port. 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu. Choose Sort by Port from the next sub-menu. The Sort by Port page will appear, as displayed in Figure 75. Figure 75 Sort by Port Window 2.
AT-S41 User’s Guide Viewing the MAC Addresses by MAC This section contains the procedure for viewing the dynamic MAC addresses that have been learned on all ports of a switch. This procedure will also let you view all static MAC addresses that have been assigned to the ports on the switch. To view the MAC addresses by MAC on the switch, perform the following procedure. 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu. Choose Sort by MAC from the next sub-menu. 1.
AT-S41 User’s Guide 3. To modify the aging time, enter a value in seconds in the Aging Time field and click the Apply button. The Aging Time setting is in the range of 10 to 1048 seconds. The default setting is 300 seconds. The management software immediately activates the new aging time value on all ports of the switch. For more information on setting the Aging Time, please refer to Changing the Aging Time on page 125.
AT-S41 User’s Guide Viewing the MAC Addresses of a VLAN The procedure in this section can be useful if you created VLANs on the switch and want to view the MAC addresses of the end nodes of a particular VLAN. (This procedure is not of much value if the switch contains only the Default VLAN, in which case displaying the entire MAC address table, as explained earlier in this chapter, produces the same result.) Note Viewing MAC addresses by VLAN is not supported in port-based VLAN mode.
AT-S41 User’s Guide 2. Enter the VLAN ID whose static and dynamic MAC addresses you want to view into the VLAN ID field. 3. Click the Apply button next to the VLAN ID field. The management software displays the MAC addresses of the nodes of all ports in the VLAN. 4. To modify the aging time, enter a value in seconds in the Aging Time field and click the Apply button. The Aging setting is in range of 10 to 1048 seconds. The default setting is 300 seconds.
AT-S41 User’s Guide Adding Static MAC Addresses The management software allows you to assign up to 256 static MAC addresses on an AT-8326GB switch. To add a static address to the MAC address table, perform the following procedure: 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu. Choose Static FDB from the next sub-menu. The Static MAC Address Configuration page will appear, as displayed in Figure 78. Figure 78 Static MAC Address Configuration 2.
AT-S41 User’s Guide Deleting Static MAC Addresses To delete a static MAC address, perform the following procedure: 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu. Choose Static FDB from the next sub-menu. The Static MAC Address Configuration window will appear, as displayed in Figure 79. Figure 79 Static MAC Address Configuration The management software displays all static addresses from the MAC address table. 2.
Chapter 26 Quality of Service This chapter contains instructions on how to configure QoS. This chapter contains the following procedure: ❑ Configuring QoS on page 223 Note For background information on QoS, refer to Quality of Service Overview on page 127.
AT-S41 User’s Guide Configuring QoS Note Quality of Service is not supported in port-based VLAN mode. To configure QoS, perform the following procedure: 1. Click on the Advanced Config menu tab and select Quality of Service from the sub-menu. The Quality of Service page will appear, as displayed in Figure 80. Figure 80 Quality of Service 2. Select a Low or High priority queue for the traffic classes whose priority you wish to change.
AT-S41 User’s Guide Note The tagged information in a frame is not changed as the frame traverses the switch. A tagged frame exits the switch with the same priority level that it had when it entered.
Chapter 27 IGMP Snooping This chapter explains how to activate and configure the IGMP snooping feature on the switch. Sections in the chapter include: ❑ Activating IGMP Snooping on page 226 ❑ Viewing Group Members on page 228 Note For background information on this feature, refer to IGMP Snooping on page 130.
AT-S41 User’s Guide Activating IGMP Snooping To enable or disable IGMP snooping on the switch and to configure IGMP snooping parameters, perform the following procedure: 1. Click on the Advanced Config menu tab and select IGMP Snooping from the sub-menu. The IGMP Snooping page will appear, as displayed in Figure 81. Figure 81 IGMP Snooping The parameters on the IGMP Snooping page are defined below: IGMP Snooping Status Enables and disables IGMP snooping on the switch.
AT-S41 User’s Guide VID The VLAN ID of the VLAN the multicast group belongs to. This parameter will only be visible if you have created a VLAN. Multicast Group Address The multicast address of the group. To view the members of the multicast group, click on the multicast address.
AT-S41 User’s Guide Viewing Group Members You can use the AT-S41 software to display a list of the members of each multicast group on a switch. To display the list, perform the following procedure: 1. Click on the Advanced Config menu tab and select IGMP Snooping from the sub-menu. The IGMP Snooping page will appear, as displayed in Figure 81 on page 226. 2. Click on a multicast group address. The group members will appear on the IGMP Snooping Group Members page, as displayed in Figure 82.
Chapter 28 Broadcast Storm Control This chapter contains instructions on how to configure the broadcast storm control feature on the switch. Note For background information on this feature, refer to Broadcast Storm Control on page 136.
AT-S41 User’s Guide Activating Broadcast Storm Control and Setting a Threshold To activate broadcast storm control and set a threshold, perform the following procedure: 1. Click on the Advanced Config menu tab and select Storm Control from the sub-menu. The Broadcast Storm Control page will appear, as displayed in Figure 83. Figure 83 Broadcast Storm Control Page 2. Select Enable from the Storm Control Status pull-down menu. 3. To set the threshold, select an option from the Threshold value pulldown menu.
Chapter 29 Management Software Updates This chapter explains how to obtain new versions of the AT-S41 management software and how to download the software onto an AT-8326GB switch from a Web browser management session.
AT-S41 User’s Guide Obtaining Software Updates New releases of the AT-S41 management software are available from the Allied Telesyn Web site at www.alliedtelesyn.com and from our FTP server at ftp.alliedtelesyn.com. To log on to the FTP server, enter “anonymous” for the user name and your e-mail address for the password. Management software for the AT-8326GB switch will have “S41” as part of the filename.
AT-S41 User’s Guide Downloading a New Management Software Image Using TFTP TFTP software is available from various sources and is included in SNMP which can be purchased through Allied Telesyn. A command line version is included in most UNIX variants and in Windows NT. Please consult the documentation or the manufacturer of the software used on the proper use of the software.
AT-S41 User’s Guide The parameters on the Image Upgrade page are defined below: Image Version/Date The software version and date currently on the switch. File Type ❑ Image An image file is the management software for the switch. ❑ Configuration A configuration file is a file that contains all of the existing configurations and settings for a switch.
Appendix A AT-S41 Default Settings This appendix lists the AT-S41 factory default settings. Setting Default IP Address Subnet Mask Gateway Address DHCP IGMP Snooping System Name MAC Aging Time Spanning Tree Protocol Status Bridge Priority Bridge Max Age Time Bridge Hello Time Bridge Forwarding Delay Twisted Pair Ports Status Duplex Mode Speed Flow Control Broadcast Control MDI/MDI-X Security Port Mirroring 0.0.0.0 0.0.0.0 0.0.0.
AT-S41 User’s Guide Setting Default Port Trunking Ports 25 and 26 Port Type (GBIC or Twisted Pair) VLANs Port-based and Tagged VLANs Default VLAN Name VID RS-232 Terminal Port Emulation Mode Data Bits Stop Bits Parity Flow Control Data Rate Key Mode Software Management Access Login Name Login Password Disabled Twisted Pair Enabled Default VLAN (all ports) 1 VT100 8 1 None None 9600 bps Terminal manager manager 236
