Management Software AT-S20 ◆ User’s Guide For use with the AT-3726XL, AT-3716XL, AT-3714FXL, AT-3726 and AT-3714F Switches Version 3.1 PN 613-10773-00 Rev.
Copyright 1998, 1999 Allied Telesyn International, Corp. 960 Stewart Drive Suite B, Sunnyvale CA 94086 All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International, Corp. CentreCom is a registered trademark of Allied Telesyn International, Corp. Netscape Navigator is a registered trademark of Netscape Communications Corporation. Ethernet is a registered trademark of Xerox Corporation.
7DEOH#RI#&RQWHQWV Preface ...............................................................................................................................................................Preface-i Purpose of This Guide .....................................................................................................................................Preface-i How This Guide is Organized .....................................................................................................................
Table of Contents Chapter 3 Getting Started With Browser Management .............................................................................................3-1 Browser Requirements .......................................................................................................... ....................................3-1 Starting a Browser Session .................................................................................................... ...................................
AT-S20 User’s Guide Chapter 5 Virtual LAN Configuration ..................................................................................................................................5-1 Configuration Information................................................................................................................................ 5-5 Port Information ..................................................................................................................................................
Table of Contents Chapter 7 Diagnostics ................................................................................................................................................................7-1 Resetting the Switch ..................................................................................................................................................7-2 To Reset the Switch.....................................................................................................................
3UHIDFH 3XUSRVH#RI#7KLV#*XLGH The purpose of this guide is to instruct network administrators on how to manage their switch by using the Omega management software to configure and monitor the device. By using the Omega software, a network administrator can manage the switch in several ways: ❑ Remotely ❑ Locally ❑ Web-based Network administrators should be familiar with Ethernet switches, bridging, and the spanning tree protocol.
How This Guide is Organized +RZ#7KLV#*XLGH#LV#2UJDQL]HG This guide is composed of the following sections: Chapter 1, Features, Menu Tree, and Defaults, which presents the major switch features, a menu tree that displays the primary and secondary menus, and a list of switch defaults in tabular form. Chapter 2, Getting Started with Local and Remote Omega, provides instructions on how to set up the switch for remotely or locally managing the switch.
AT-S20 User’s Guide 'RFXPHQW#&RQYHQWLRQV The conventions used in this guide are as follows: ❑ For DEC VT100 or ANSI (the default) terminal configuration: When directed To select an option You must Highlight the option by pressing the Up (↑) or Down (↓) arrow key; then press RETURN or Type the first character of the option you want at the prompt and then press RETURN.
Document Conventions ❑ For generic (dumb terminal) terminal configuration: When directed To select an option You must Type the first character of the option you want and then press RETURN. If two or more options have matching initial characters, type enough characters for Omega to distinguish your choice from the other options; then press RETURN. To guide you, the characters you must type are in uppercase.
AT-S20 User’s Guide The default selection in a DEC VT100 terminal configuration also appears darker. If you change the option, Omega changes the user interface by moving the > to the new selection. For example: VT100-compatible / ANSI > Generic dumb terminal ❑ Selecting menu options: Menus and submenus are in courier type. Menu hierarchies are separated by a >.
Related Guides 5HODWHG#*XLGHV Allied Telesyn wants our customers to be well informed by providing the most up-to-date and easily accessible guides and other technical information. Visit our website at: www.alliedtelesyn.
&KDSWHU 4 )HDWXUHV/#0HQX#7UHH/#DQG#'HIDXOWV 6RIWZDUH#)HDWXUHV The switches have the following major software management features: ❑ Supports industry-standard 802.
Software Features 1-2 ❑ Port Trunking allows configuring of Ports A and B to function as a single uplink port which effectively increases the throughput of the connection. ❑ Spanning Tree Protocol (STP) support ❑ System configuration, management, and diagnostics using Allied Telesyn’s Omega interface, accessible locally via an RS232 asynchronous terminal port, remotely via Telnet, or a web browser.
AT-S20 User’s Guide 6ZLWFK#1DPLQJ DQG#6HFXULW\ )HDWXUHV The switch provides configurable options for customizing for example, ❑ Naming the switch and its ports Names are more descriptive and easier to remember than addresses. Port names can be associated with the user assigned to the port or an office location. The need to use symbolic names becomes more apparent as you add more switches and therefore multiply the number of ports you must manage.
Switch Default Settings 6ZLWFK#'HIDXOW#6HWWLQJV Table 1-1 lists the switch default settings. Table 1-1 Switch Default Settings Settings Default IP Address 0.0.0.0 Subnet Mask 0.0.0.0 Gateway Address 0.0.0.
AT-S20 User’s Guide 6HWWLQJ#6ZLWFK#'HIDXOWV To set your switch to the factory defaults, do the following: Warning This operation deletes existing switch configurations. 1. Attach a terminal or PC to the RS232 port located on the front panel of the switch and start the terminal emulation program. 2. Press RESET located on the right side of the switch’s front panel. 3. Immediately press any key when you see Hit any key to run diagnostics or to reload system software. A menu then displays. 4.
Menu Tree 0HQX#7UHH The following illustration shows the Omega Menu tree.
AT-S20 User’s Guide Traffic/Port Mirroring Virtual LAN 3 Enabled Virtual LAN definitions Disabled Port to VLAN configuration Bridge Spanning tree parameters Port spanning tree configuration MAC Address Show all MAC addresses By port MAC addresses Get Port From MAC Address All static MAC addresses Per port static MAC addresses Multicast addresses Clear static MAC table 3.
&KDSWHU 5 *HWWLQJ#6WDUWHG#ZLWK#/RFDO#DQG#5HPRWH#2PHJD *HWWLQJ#6WDUWHG#ZLWK#/RFDO#2PHJD To locally managing your switch, simply connect a terminal or PC directly to the switch’s RS232 port to access the Omega menus. See the following sections. &RQILJXULQJ#
Getting Started with Local Omega 6WDUWLQJ#DQ 2PHJD#6HVVLRQ Once you have established a connection to the switch, the Omega Main Menu displays. The banner reflects the name of your switch. This example shows that the AT-3714FXL switch is operating and the switch name is Accounting.
AT-S20 User’s Guide (QWHULQJ#DQ#,3 $GGUHVV If you have a TCP/IP network but do not have a BootP server, or DHCP server, you must enter an IP address and subnet mask for the switch through Omega. 1. Select System administration IP Parameters from the Main Menu. 2. Select IP address and enter a unique IP address for the switch. 3. Select Subnet mask and enter the switch’s subnet mask. 4. Select Gateway address and enter the address if you are sending packets to another IP network.
Remote Management Requirements 5HPRWH#0DQDJHPHQW#5HTXLUHPHQWV You can remotely manage your switch, but first you must have one of the following: ❑ The switch’s pre-configured MAC address (located below the RS232 Terminal Port label on the switch’s front panel ❑ A unique IP address if you use TCP/IP (by either assigning one to the remote switch or by having your BootP/DHCP server provide the needed parameters ❑ A unique name for the switch that you assign via Omega (see Naming the Switch on page 4-8.
AT-S20 User’s Guide 7&32,3#ZLWKRXW %RRW3 To manage the switch using SNMP, Telnet or web browser, you must at least enter the IP address and subnet mask using the Omega menus. 1RQ07&32,3 1HWZRUNV To manage your switch on a non-TCP/IP network, you need to locally connect to one switch in the segment (see Configuration Options on page 2-5). You can then connect to other segments on the same segment using the techniques described in Chapter 4, Connecting to a Remote System.
&KDSWHU 6 *HWWLQJ#6WDUWHG#:LWK#%URZVHU# 0DQDJHPHQW %URZVHU#5HTXLUHPHQWV To use AT-S20 software via a browser, you need the following: ❑ A computer connected to any network port ❑ A Web browser, such as Netscape Navigator®, installed on the computer ❑ The IP address of the switch (see Chapter 2, Configuration Options) Note While only one local or remote Omega session can be opened, there can be multiple web-based sessions opened at any time.
Starting a Browser Session 6WDUWLQJ#D#%URZVHU#6HVVLRQ To access the switch using your browser, do the following: 1. If your network is using a proxy server, you will need to make exceptions for the switches that you want to manage. Refer to the documentation provided with your web browser. Note At minimum, you must have Netscape version 3.0 or any other industry-standard browser to manage the switch via a browser. 2. At the Universal Resource Locator (URL) prompt, enter the switch’s IP address.
AT-S20 User’s Guide 1DYLJDWLQJ#$URXQG#WKH#6ZLWFK The switch’s front panel is active. You can click anywhere on the switch and a menu or table displays. For example, if you click Port 15, that port’s settings appear, as shown in Figure 3-1.
Navigating Around the Switch If you click any other area other than a specified port on the switch’s front panel, the following table displays. Figure 3-2 Port Link, Status, and Mode States You also can click on the Omega Main Menu. You are now ready to configure your switch. See Chapter 4, Configuration and Administration.
&KDSWHU 7 &RQILJXUDWLRQ#DQG#$GPLQLVWUDWLRQ This chapter describes the management tasks according to switch, configuration, port configuration and administration.
Administration covers the following topics: 4-2 ❑ Pinging a Remote System on page 4-4 ❑ Configuring IP Parameters on page 4-6 ❑ Performing Software Upgrades Via TFTP on page 4-24 ❑ Using XModem to Download on page 4-27 ❑ Configuring for Bridging on page 4-28
AT-S20 User’s Guide &RQQHFWLQJ#WR#D#5HPRWH#6\VWHP 0HQX1#Administration> Connect to a remote system This option allows you to use a AT-3726XL, AT-3726, AT-3716XL or AT-3714FXL, AT-3714F switch to connect to and manage another Allied Telesyn device. You can also use Telnet. Select Administration> Connect to a remote system. Please specify the system to connect to: The system may be identified by name (‘name’), by IP address (128.2.3.4), or by Ethernet address (0000F4 123456) ->_ 3.
Pinging a Remote System 3LQJLQJ#D#5HPRWH#6\VWHP To ping a remote system, use the PING facility to test the reachability of receiving systems by sending them an Internet Control Message Protocol (ICMP) echo request and by then waiting for a reply. 0HQX1#Administration> Ping a remote system 1. Select Administration> Ping a remote system. Please enter station to ping: The system may be identified by name (‘name’), by IP address (128.2.3.4), or by Ethernet address (0000F4 123456).
AT-S20 User’s Guide (QDEOLQJ#RU#'LVDEOLQJ#D#3RUW 0HQX1#Port status and configuration> Ports are enabled as a default. Disable a port if you suspect there is a problem and you want to isolate the problem to that port, therefore preventing error proliferation. You may also want to temporarily disable a port that is not in use (an unoccupied office, for example) for security reasons. 1. Select Port Status and configuration to display the list of ports. 2.
Configuring IP Parameters &RQILJXULQJ#,3#3DUDPHWHUV 0HQX1# System Configuration> IP parameters This option applies to TCP/IP based networks only. Some IP parameters are required and others have default values you may keep. There are also optional parameters for information purposes only. Note If you have a BootP server and you have mapped the switch’s MAC address to IP parameters, the switch will obtain its IP parameters from the server. 1. Select System Configuration, then IP parameters.
AT-S20 User’s Guide IP address - This address is required. Subnet mask - This is required. Gateway address - This address is required if you need to send packets from one IP network to another via a router. Domain Name Server - This address is configurable and if enabled, the DNS server will resolve names for IP commands, such as Connect (Telnet), Ping, and TFTP downloads.
Naming the Switch Contact - You may enter a text string to indicate the name, phone number, and other useful information to help identify the person responsible for the switch. This parameter is optional and is used for SNMP management.
AT-S20 User’s Guide The system administration menu displays with the switch’s name displayed at the top of the screen.
Naming the Switch &KDQJH2'HOHWH WKH#6ZLWFK#1DPH 1. Select System configuration> System name to display the switch’s current name. System name Accounting 2. Remove or change the current name. 3. Select the current name; press RETURN. The greater-than arrow key displays indicating that the system is ready to either accept a new name or delete the existing name. 4. Press the space bar until the name has been deleted. Press RETURN. Null (not configured) displays. 5. Return to the Main Menu.
AT-S20 User’s Guide 1DPLQJ#WKH#3RUW 0HQX1#Port status and configuration> Depending on the model, the switch has the following ports, identified numerically, as listed in Table 4-1.
Naming the Port The port configuration screen is partially shown. >Transmit Pacing Enabled No Transmit Pacing Port name Port naming option Return to Port Status Menu ... 3. Enter a port name. Then press RETURN. Note Enter a name of up to 20 characters, for example, Room 1147. The system updates the port configuration screen by displaying the name you entered at the top of the screen, as shown in the following example.
AT-S20 User’s Guide &KDQJLQJ#RU 'HOHWLQJ#D#3RUW 1DPH 1. Select Port status and configuration to display the list of ports. 2. Select a port number, for example, 1, from the list to display the port configuration screen. 3. Select Port name and press RETURN. Type a new port name or delete the existing one. (Screen partially shown.) Press RETURN. Transmit pacing enabled >No transmit pacing Port name Saturn 4. If deleting the port name, the system also erases the name from the top of the screen. 5.
Assigning a Password to the Switch $VVLJQLQJ#D#3DVVZRUG#WR#WKH#6ZLWFK 0HQX 1#System configuration> Omega options> Password Assigning a password protects the switch management software from unauthorized configuration changes. Once you configure a password, you need to enter it at the start of an Omega session. 1. Select System configuration> Omega options> Password. Password: Null (not configured) -> Timeout: 5 2.
AT-S20 User’s Guide (QDEOLQJ#6WRUH0DQG0IRUZDUG#RU#&XW0WKURXJK#+)UDJPHQW0)UHH, 0HQX1#Port Status and configuration Forwarding method determines how the port handles packets. The options you see on the port configuration screen is related to how the switch is configured to forward packets as a whole. The default setting for the switch is Store-and-Forward. 1. Select Port status and configuration to display the list of ports. 2. Select a port number from the list.
Enabling Store-and-forward or Cut-through (Fragment-Free) Cut-through (fragment-free). This option is available for non-XL versions only. In this method, the switch starts to forward the incoming packet to its destination while the packet is still being received. Cut-through (fragment-free) provides low latency for forwarding frames and also filtering fragment frames by not transmitting a frame until 64 bytes have been received by the switch.
AT-S20 User’s Guide (QDEOLQJ#$XWR01HJRWLDWH2+DOI0'XSOH[2)XOO0'XSOH[ 0HQX1# Port status and configuration> The port’s transmission mode defines the direction that data can move. The switch provides the following port transmission modes: ❑ Auto-negotiate (AT-3726XL, AT-3716XL, AT-3726 default) ❑ Full-duplex ❑ Half-duplex (AT-3714FXL, AT-3714F default) 1. Select Port Status and configuration to display the list of ports. 2. Select a port number from the list of ports.
Enabling Transmit Pacing Note Make sure that both ends of the connect are set to the same mode. If only one end of the connection is capable of auto-negotiation, then both ends of the connection must be manually set for speed and halfor full-duplex. (QDEOLQJ#7UDQVPLW#3DFLQJ Transmit Pacing is the switch’s capability to inject transmit delays and is selectable on a per port basis.
AT-S20 User’s Guide 6HWWLQJ#8S#D#97433 0HQX1 #System configuration> Terminal configuration>VT100-compatible/ANSI The system displays the default terminal configuration settings. > VT100-compatible / ANSI Generic “dumb” terminal > 8 data bits 7 data bits > 1 stop bit 2 stop bits > No parity Odd parity Even parity > Full duplex (echo) Half duplex (no echo) Data rate (“baud rate”) ... To make your terminal selections, simply select the setting of you choice, then select Return to previous menu...
Setting Up a VT100 6HWWLQJ#%DXG 5DWHV 0HQX1#System configuration> Terminal Configuration> Generic dumb terminal> (Data rate baud rate)... Note The default is automatic baud rate detection. You can also select from the following fixed baud rates. Allied Telesyn recommends 9600 bps.
AT-S20 User’s Guide 6HWWLQJ#7LPH#2XW#3URWHFWLRQ 0HQX1# System configuration> Omega Options A timeout value is one way to protect the switch from unauthorized use in case you forget to exit from Omega and then leave the switch unattended. If you configure a timeout value, the software clocks the elapsed time between the last time any key was pressed during an Omega session and the current time. If the elapsed time exceeds the timeout value, the software automatically terminates the session. 1.
Enabling/Disabling Omega Access (QDEOLQJ2'LVDEOLQJ#2PHJD#$FFHVV /RFDO#2PHJD 5HPRWH#2PHJD The default for Local Omega is Enabled. This means you can access the Omega menus from a terminal or PC connected to the switch’s RS232 port. The default for Remote Omega is Enabled. You still can use SNMP to manage the hub remotely. To change the setting again, use Local Omega. :HE0EDVHG 2PHJD The default for Web-based Omega is Enabled.
AT-S20 User’s Guide (QDEOLQJ2'LVDEOLQJ#%DFNSUHVVXUH This feature is available for the XL versions only. For backpressure to be implemented, the ports must be in half-duplex mode. Backpressure is useful when a port’s input buffer is running low on of memory resources. For example, outbound packets are traversing a single uplink port. When backpressure is enabled, the switch simulates a collision when its input buffers are nearly filled so that sending devices will defer transmissions.
Performing Software Upgrades Via TFTP 3HUIRUPLQJ#6RIWZDUH#8SJUDGHV#9LD#7)73 You can download software upgrades from a switch to one or more switches on the network, or download onto a switch via Trivial File Transfer Protocol (TFTP) from a TFTP server. The switches initially use a factory-configured default download password, ATS20 to authorize software downloads. You do not need to manually enter this password to download software successfully.
AT-S20 User’s Guide 'RZQORDGLQJ IURP#2QH#6ZLWFK WR#$QRWKHU 0HQX1# Administration> Update software in another system Follow this procedure: ❑ To download software to another switch on the network without physically being at the destination switch ❑ To ensure that all the switches on the network you intend to upgrade will be upgraded, since you will be manually upgrading one switch at a time 1. Select Update software in another system.
Performing Software Upgrades Via TFTP %URDGFDVW 8SGDWHG#6RIWZDUH WR#$OO#6\VWHPV 0HQX1# Administration> Broadcast Updated Software to All Systems Note Plan a software broadcast during times when your network is not busy. 1. Select Administration> Broadcast updated software to All systems. The switch announces the availability of the software to all switches; in turn, the switches that need the upgrade respond with a request message.
AT-S20 User’s Guide 8VLQJ#;0RGHP WR#'RZQORDG 1. Select Adminstration
Configuring for Bridging &RQILJXULQJ#IRU#%ULGJLQJ 0HQX1# Bridging The options under the Bridging Menu item are for configuring and enabling spanning tree. As a bridge, the switch: ❑ Learns source and destination MAC addresses of incoming packets by storing the information in a forwarding table (see also Activity Monitor on page 6-2).
AT-S20 User’s Guide Note Although defaults are adequate for most installations, changing defaults should be done only if the network administrator understands the IEEE 802.1d standard. &RQILJXULQJ 6SDQQLQJ#7UHH 3DUDPHWHUV 0HQX1# Bridging Spanning tree parameters Default spanning tree parameters are provided; you do not need to change them. 1. Select Bridging, spanning tree parameters to display the bridging options, as shown in the following screen.
Configuring for Bridging 3. Enter Max age time to get the next screen and enter the aging time in seconds at the prompt. The aging time can be from 6-40 seconds, with 20 seconds as a default. All bridges in a bridged LAN use this aging time to test the age of stored configuration messages called bridge protocol data units (BPDUs). For example, if you use the default 20, all bridges delete current configuration messages after 20 seconds.
AT-S20 User’s Guide 'HVLJQDWLQJ#WKH 5RRW#3RUW 0HQX1# Bridging> Port spanning tree configuration In this procedure, you identify the root port and the path cost for the spanning tree. Default values will work for the majority of the users; but for purposes of illustration, Port 1 will be the root. All ports have priority 128 and cost values are 100 by default. 1. Select Port spanning tree configuration from the Bridging Menu to get a similar list shown on the screen.
Configuring for Bridging 3. Select Priority to get the next screen and enter 0 as the priority number at the prompt to make Port 1 the root port. The range is 0-255. When the designated root port is disabled or the cable connection breaks, the STP algorithm reconfigures an alternate path to the LAN by identifying the port with the next lowest priority number. 4. Select Cost to get the next screen and enter a cost parameter ranging from 1-65,535; or keep the default value.
AT-S20 User’s Guide 6HOHFWLQJ#*OREDO#&RQILJXUDWLRQ 0HQX1#Port Status and configuration> >Global Config Selecting this option copies the displayed port configuration (enable, auto-negotiate, etc.) to all regular (non-uplink) ports on the switch without changing the port names or VLAN assignments. Port names and VLAN assignments remain as originally defined. 1. Select Port Status and configuration to display the list of ports. 2. Select a port number, for example, 1 , from the list. 3.
Enabling/Disabling Port Trunking (QDEOLQJ2'LVDEOLQJ#3RUW#7UXQNLQJ Port Trunking configures Ports A and B to function as a single uplink port to increase the bandwidth of the connection. Communication streams between two devices across the trunked uplink port will always be passed on the same physical port. If one trunk port becomes inactive, the other continues to operate and handle all uplink traffic. When the inactive port recovers, the switch automatically resumes its operation; no reset is required.
&KDSWHU 8 9LUWXDO#/$1#&RQILJXUDWLRQ This chapter introduces VLAN configuration as it applies to Allied Telesyn’s implementation of VLANs. VLAN features are provided only on the XL versions of the switches. The XL versions support portbased VLANs and 802.1Q (draft 8) VLAN tagging. 0HQX1Virtual LANs. Figure 5-1 Virtual LANs Menu By default, the switch has one port-based VLAN (all ports’ VLAN assignment showing as Default VLAN) and one spanning tree domain.
Virtual LAN Configuration You can group your end stations logically through VLANs. Information exchange is confined within the members of a given VLAN. A VLAN constitutes one broadcast domain; therefore, broadcast packets from an end station only go to other stations within the same VLAN. Port-based VLANs cannot communicate with each other through the switch; they require a router to do this (Figure 5-2).
AT-S20 User’s Guide When a port is a member of a port-based VLAN, it is internally assigned a unique Port VLAN ID or PVID. This PVID is added as a VLAN tag as frames enter this port. This PVID is used to route the frame through the switch and through 802.1Q-based switches. This enables legacy (non-802.1Q compliant) devices connected to the switch to take advantage of the VLAN capabilities of the switch. Note The manager is a legacy device. It cannot interpret VLAN tags.
Virtual LAN Configuration The AT-8518 is configured as follows: Workstation #1 ❑ The AT-8518 will have a VLAN named “Default VLAN”. Ports 1 and 3 will be both tagged and a port-based member of “Default VLAN” with a PVID and a VLAN ID of 1. Port 10 is added as a tag member so that “Default VLAN” will have access to the uplink between switches. ❑ The AT-8518 will have a VLAN named “VLAN 2”. Port 2 will be tagged and a port-based member of VLAN #2 with a PVID and VLAN ID of 2.
AT-S20 User’s Guide Uplink ports (15 and 10 on both switches) are used to connect the two switches. To allow VLANs to span across switches, these uplink ports are output enabled for every configured VLAN on the switch. Therefore, when a broadcast packet is received on any port (representing a packet on any VLAN), it is transmitted through the uplink port.
Virtual LAN Configuration The following Omega configuration screens show VLAN and port to VLAN definitions.
AT-S20 User’s Guide $GGLQJ#D#1HZ 9/$1 0HQX1 Virtual LANs> 1. Select Add new table entry>. The following screen displays. Figure 5-6 Adding New VLAN Descriptors 2. Enter the following VLAN descriptors: ❑ New VLAN name (in this example Lindsey) When you enter a new VLAN name, for example Lindsey, the ID number automatically increments to the next VLAN ID number, for example from 1 to 2. See following screen.
Virtual LAN Configuration 3. Select Return to VLAN Definition Menu. The following screen displays showing the new VLAN descriptors. automatically increments Figure 5-7 New VLAN Descriptors Note Allied Telesyn highly recommends that you use the VLAN ID (default) supplied by the system. Although you can change VLAN IDs to suit your specific needs, changing them requires a more advanced understanding of VLAN tagging.
AT-S20 User’s Guide 3RUW#WR#9/$1 &RQILJXUDWLRQ 0HQX1 Virtual LANs> 1. Select Port to VLAN configuration. Figure 5-8 Virtual LAN Menu Figure 5-9 Port-To-VLAN Configuration If you select Port 6 for example, the screen will show that Port 6 is now associated with the Default VLAN.
Virtual LAN Configuration 'HOHWLQJ#D#3RUW IURP#D#9/$1#RU &KDQJLQJ#3RUW·V 9/$1 $VVLJQPHQW 1. Select Port VLAN configuration from the Virtual LANs menu to display the port list with VLAN assignments. 2. Select the port number you want to delete or change. The screen displays the port’s VLAN configuration and a list of available VLANs). 3. Do one of the following: ❑ To reassign the port to another VLAN, select the new VLAN name from the list.
&KDSWHU 9 0RQLWRULQJ This chapter describes the tasks related to monitoring the switch.
Activity Monitor $FWLYLW\#0RQLWRU 0HQX1#Administration> Activity Monitor The Activity Monitor option is useful in troubleshooting or in monitoring software broadcasts. You can observe ongoing system activity, if any. The following screen displays when you select Administration> Activity monitor. Accounting Activity monitor Broadcast notification sent. Broadcast notification sent.
AT-S20 User’s Guide 0$&#$GGUHVV#7DEOH The MAC address table (also referred to as the forwarding table) is a snapshot of source MAC addresses that the switch has learned and static MAC addresses which have been stored in the switch’s volatile memory until the addresses have aged. The information on the table dynamically changes as packets appear on any port. The software deletes a MAC address from the table after the aging time of 300 seconds (5 minutes).
MAC Address Table 6KRZ#$OO#0$& $GGUHVVHV Select MAC Address Table> Show all MAC addresses. MAC Address Table Accounting MAC Addresses - Page 1 MAC Address Port MAC Address Port 0000F4 010001 2 0000F4 010010 2 0000F4 010003 2 0000F4 010011 2 0000F4 010004 2 0000F4 010011 2 0000F4 010005 2 0000F4 010013 2 0000F4 010006 2 0000F4 010014 2 0000F4 010007 2 0000F4 010015 2 Next page Return to MAC Address Menu ...
AT-S20 User’s Guide *HW#3RUW#IURP 0$&#$GGUHVV Users can enter a MAC address and the program returns the port number associated with the MAC address. 0HQX1# Get Port from MAC Address 1. Select MAC Address Table from the main menu. The MAC address menu displays. 2. Select Get Port from MAC Address. 3. In the MAC Address field, using the Up Arrow key, enter the MAC Address, for example 0000F4 010203. Then press RETURN.
Static MAC Addresses 6WDWLF#0$&#$GGUHVVHV Static MAC addresses are associated with only one port, the port assigned to the device with that MAC address. Static addresses remain in the table and are not aged in 5 minutes like other learned MAC addresses.
AT-S20 User’s Guide 6KRZ#3HU#3RUW 6WDWLF#0$& $GGUHVVHV 0HQX1# MAC Address Table>Per Port Static MAC Addresses> Port number See Figure 6-7 and Figure 6-8. Port Selection Menu Accounting Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 16 Port 17 Port 18 Port 19 Port 20 Port 21 Port 22 Port 23 Port 24 Port 26 - Uplink Port A Port 27 - Uplink Port B Return to MAC Address Menu ...
Static MAC Addresses 'HOHWH2$GG#6WDWLF 0$&#$GGUHVV 0HQX1# MAC Address Table> Per port static MAC addresses> Port number> Add MAC address 1. Select Per port static MAC address screen, then . 2. Enter your six digit static MAC address. Figure 6-9 shows that the static MAC address table has been added to Port 19 (Randy).
AT-S20 User’s Guide $GG2'HOHWH#6WDWLF 0$&#$GGUHVVHV DQG#6HOHFWLQJ 3RUWV#IRU 0XOWLFDVWV 0HQX1# Multicast addresses> Add MAC address> Ports for Multicasts Multicast addresses are a type of static address. When you clear the static address table, all multicast addresses are discarded. However, if you add a multicast address, this address appears in the static address table. Note You add or delete a MAC address from the Muticast Addresses menu.
Static MAC Addresses 2. As an example, enter the six digit multicast MAC address (010002 00000B) and the ports (5,10,12) that you want to receive multicast packets from that device. See Figure 6-11.
AT-S20 User’s Guide &OHDULQJ#6WDWLF 0$DEOH When you clear the static address table, all multicast addresses are discarded. However, if you add a multicast address, this address appears in the static address table. 0HQX1# MAC Address Table Clear> Clear static MAC table 1. Select MAC Address Table, then select Clear static MAC table. Clear Static MAC table now? (Yes or No): 2. Enter y to clear the MAC address table.
Security/Source Address Table 6HFXULW\26RXUFH#$GGUHVV#7DEOH# The Security/Source Address Table menu defines two options: ❑ Source Address Learning Mode (Secure or Automatic) ❑ Intruder Protection Action (SNMP Trap/No Trap; Port Disabled/Not Disabled ❑ Threshold Security Figure 6-12 shows the Security/Source Address Table menu and defaults.
AT-S20 User’s Guide Table 6-1 briefly lists the options in the Security/Source Address Table menu. For complete definitions of this options, see the sections that follow this table. Table 6-1 Security/Source Address Table Options States Source Address Learning Mode Automatic Source address learning is enabled, and the intruder protection is disabled. Secure The source address table is locked, and the intruder protection is enabled. Threshold Learning is enabled.
Security/Source Address Table Automatic: Learning On/Security Off The automatic mode is the default setting. When in “automatic” mode, the SAT is in an “unlocked” state and is updated each time a port receives a packet from a new source address. The SAT address table can store 2K of MAC addresses.
AT-S20 User’s Guide 6HFXULW\ 7KUHVKROG Security Threshold allows the user to limit or set the number of MAC addresses for any port or all ports. In addition, when threshold is enabled; intruder protection also is enabled. The port continues to learn new MAC addresses until it is disabled. In a busy network, the port may accumulate more MAC addresses than the specified limit if MAC addresses are learned between the time the threshold is exceeded and the time the port is disabled. See Figure 6-13.
Security/Source Address Table Figure 6-15 MAC Address Limit on Port 5 All ports with the limit of three MAC Addresses Figure 6-16 MAC Address Limit on All Ports 6-16
AT-S20 User’s Guide ,QWUXGHU 3URWHFWLRQ The Intruder Protection feature resides in the lower-half of the Security/Source Address Table menu and is shown in Figure 6-12. This screen does not appear until you first enable Secure: source address table locked; intruder protection enabled option. Figure 6-17 Intruder Protection Screen Section The Intruder Protection option determines how the switch handles transmissions from MAC addresses not found in the SAT.
Security/Source Address Table Disable the Port (no SNMP trap) Use this configuration when you want the switch to automatically disable the port when an intruder is detected. Once the switch software disables a port because of an intruder, no source address can use that port. The port remains disabled until you manually enable it. Note When the Security feature is used to disable a port, the MAC addresses are not deleted until the port is re-enabled.
AT-S20 User’s Guide 6HWWLQJ#6HFXULW\26RXUFH#$GGUHVV#7DEOH#2SWLRQV# Security options are enabled or disabled on a system-wide basis. To set any of the options within the Source Address Learning Mode menu, simply select the desired option using the UP and DOWN arrow keys and then press Enter. Options on the menu that are in bold print are the defaults.
Setting Security/Source Address Table Options 6HWWLQJ#6HFXULW\ 7KUHVKROG 1. Select When enabled, this feature displays in bold print on your screen. 6HWWLQJ#1XPEHU RI#0$&#$GGUHVV Select The following screen displays. Figure 6-20 Five MAC Addresses Assigned to Port 1 2.
AT-S20 User’s Guide 3. To apply the same number of MAC address limits to all ports, select . The following screen displays. All ports with the limit of three MAC Addresses Figure 6-22 MAC Address Limit on All Ports Setting a port(s) to 0 (default) indicates that there is no limit of MAC addresses for the specified port(s). In threshold mode, the port disable option must be enabled to stop intruder traffic since the switch is in learning mode.
Setting Security/Source Address Table Options The defaults for Intruder Protection are: ❑ No SNMP Trap if an intruder is detected ❑ Port state unchanged if an intruder is detected 1. Select 2. Select For detailed MAC address information, see MAC Address Table on page 6-3. All other related MAC address information follows the MAC Address Table section.
AT-S20 User’s Guide 0LUURU#3RUW# 0HQX1# Traffic/Port Mirroring The Mirror Port allows you to monitor traffic on any port with the use of a monitoring device. Traditionally, users had to sacrifice one other port to mirror another; for example, to monitor traffic on Port 2 (the source port), you had to configure another port (for example, Port 3), as the destination port to mirror it. Port 3 therefore could not perform its primary function, switching packets, while it is mirroring Port 2.
Mirror Port The software displays a list of ports, similar to the following screen (some ports have been named in the example): Please select a port: Port 1-Room 1148 Port 2-Room 1149 Port 3-Room 1150 Port 4-Room 1151 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 16 Port 17 Port 18 Port 19 Port 20 Port 21 Port 22 Port 23 Port 24 Port 26-Uplink Port A Port 27-Uplink Port B Return to Port Mirroring Configuration... 4.
AT-S20 User’s Guide 3RUW#6WDWXV 0HQX1# Port status and configuration Selecting Port Status and configuration from the Main Menu for the first time displays the list of ports similar to the following screens. Note For the AT-3714FXL and AT-3714F, Ports 14 and 15 are the uplink ports (Port A and Port B). Accounting Port 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: More ...
Port Numbering 3RUW#1XPEHULQJ Table 6-2 shows the port numbers for the switch.
AT-S20 User’s Guide Selecting a port number, for example, 1, from the list displays the port configuration screen for Port 1, as shown in Figure 6-25. Accounting Port 1 Link State: Online Port State: Enabled Transmission Mode: Half duplex Enable this port Disable (partition) this port Auto negotiate Full duplex Half duplex Store-and-forward Cut-through (fragment-free) Transmit pacing enabled No transmit pacing Port Name Return to Port Status Menu ...
Statistics: Received and Transmitted Ethernet Frames 6WDWLVWLFV=#5HFHLYHG#DQG#7UDQVPLWWHG#(WKHUQHW#)UDPHV 0HQX1# Ethernet statistics You can view statistics on received and transmitted frames in two ways: ❑ At the switch level, where you see the total of each frame type on all ports taken together; or ❑ At the port level, further broken down into: — Per port, all frame types — Per frame type Statistics are useful if you are trying to diagnose a problem and would like to isolate it to a specific port.
AT-S20 User’s Guide The graph shows the types of frames received by the switch over a period since the switch’s last reset or since the counters have been reset to zero. Table 6-3 lists and defines the types of received frames. 2. Select RMON Statistics from the Receive Statistics Graph to display the RMON Statistics Graph. 3. Select a port, for example Port 1. Figure 6-28 displays the RMON Statistics for Port 1.
Statistics: Received and Transmitted Ethernet Frames Table 6-3 Received Frames Frame Type Description Received Good Frames Total number of frames received by the switch since the last reset. Filtered Frames Frames received by the switch but not forwarded because the destination is within the same LAN segment, therefore, the frame was already seen by all nodes on the segment. Broadcasts Frames received and then forwarded by the switch destined for nodes on the network.
AT-S20 User’s Guide 4. Select Transmit Statistics to display the Transmit Statistics Graph, as shown in Figure 6-28. Accounting Transmit Statistics Graph Total Good Transmits: 146816 Broadcasts: 94 Multicasts: 93126 Transmits Deferred: 563 Single Collisions: 200 Multiple Collisions: 355 Late Collisions: 0 Excessive Collisions: 0 Carrier Sense Errors: 0 Transmit Timeouts 399 Individual port overview...
Statistics: Received and Transmitted Ethernet Frames The graph shows the types of frames transmitted by the switch over a period since the switch’s last reset or since the counters have been reset to zero. Table 6-4 lists and defines the types of transmitted frames. Table 6-4 Transmitted Frames Frame Type Description Total Good Transmits Total frames transmitted by the switch without errors. Broadcasts Total number of received/transmitted good packets that were directed to the broadcast address.
AT-S20 User’s Guide 9LHZLQJ#3RUW 6WDWLVWLFV 1. Select Ethernet statistics, then select Receive Statistics Graph. 2. Select Individual port overview to display a screen similar to Figure 6-29, listing each port and the corresponding total number of frames received: Accounting Total Received Frames Port 1 - Room 1147:294791 Port 2 - Room 1148:52018 Port 3: 0 Port 4: 0 Port 5: 0 Port 6: 0 Port 7: 0 Port 8: 0 Port 9: 0 Port 10: 0 Port 11: 0 Port 12: 0 More...
Statistics: Received and Transmitted Ethernet Frames The graph shows the frames Port 1 has received over a period since the switch’s last reset or since someone has last set the counters to zero. 4. Select Transmit statistics to display a screen similar to Figure 6-31, showing the frames transmitted by Port 1.
AT-S20 User’s Guide 8VLQJ#WKH#*UDSKV DV#D#0RQLWRULQJ DQG#'LDJQRVWLFV 7RRO 1. Display any of the Ethernet statistics graphs by selecting Ethernet statistics from the Main Menu. 2. Observe the counters and the graph. The graph helps you visually monitor the proportion of good and bad frames the switch has detected. Good frames consist of filtered and forwarded unicasts, broadcasts, and multicasts. Bad frames are runts and long frames or those with CRC or alignment errors.
&KDSWHU : 'LDJQRVWLFV This chapter describes the following topics: ❑ Resetting the Switch on page 7-2 ❑ Running Diagnostics on page 7-3 ❑ Getting Help on page 7-4 ❑ Resetting Statistics Counters on page 7-5 Also see AT-3726XL, AT-3716XL, and AT-3714FXL Installation Guide and AT-3726, AT-3718, and AT-3714F Installation Guide that explains in detail the different ways to diagnose error conditions by interpreting the LEDs on the switch’s front panel.
Resetting the Switch 5HVHWWLQJ#WKH#6ZLWFK 0HQX1 Administration> Reset and restart the system You reset the switch: 7R#5HVHW#WKH 6ZLWFK ❑ As a first attempt to fix an error condition; for example, the FAULT LED is on ❑ To download software through a modem ❑ To reset all statistics counters to zero 0HQX1 Administration> Reset and restart the system Optionally, you can press Reset on the switch’s front panel, or unplug its power cord and then plug it in.
AT-S20 User’s Guide 5XQQLQJ#'LDJQRVWLFV 0HQX1 Administration> Diagnostics Select Diagnostics from the System Administration Menu to display the Diagnostics screen. The example in Figure 7-1 shows the Diagnostics screen on a switch named Accounting. Accounting Allied Telesyn AT-3714FXL MAC Address 0000F4 010203 RJ45/MII Applique, MAU AT-S20 Ethernet Switch Software: Version 3.
Getting Help *HWWLQJ#+HOS Contact Allied Telesyn’s technical support at www.alliedtelesyn.com.
AT-S20 User’s Guide 5HVHWWLQJ#6WDWLVWLFV#&RXQWHUV 0HQX1 Ethernet statistics> Zero all statistics on the entire system You reset the statistics counters because: ❑ The counters no longer reflect the current information. For example, disabling a port to fix a problem does not reset its counters. After the error clears and you manually re-enable the port, you may want its statistics to accumulate from a fresh start.
$SSHQGL[ $ 6SDQQLQJ#7UHH#3URWRFRO This appendix provides a brief explanation of Spanning Tree Algorithm and its use with the switch. For detailed information on the operation of the Spanning Tree Algorithm, consult IEEE Std 802.1D, ISO/IEC 10038: 1993. &RQFHSWV The switch, which runs the AT-S20 software, also implements the IEEE 802.1D Spanning Tree Protocol (STP). The STP provides a network with robustness and allows network administrators to easily change their network topology.
Concepts )HDWXUHV 3DUDPHWHUV The switch provides the following STP features: ❑ Compensates automatically for the failure, removal, or addition of any bridge in an active data path. ❑ Achieves port changes in short time intervals, which establishes a stable active topology quickly with a minimum of network disturbance. ❑ Uses a minimum amount of communications bandwidth to accomplish the operation of the STP.
AT-S20 User’s Guide 2SHUDWLRQV When spanning tree is enabled for the first time or when the network topology changes due to a failure, the addition, or removal of a component, the spanning tree algorithm automatically sets up the active topology of the current network. Communication between bridges. Periodically, all devices running STP on a network transmit packets to each other through the Bridge Group Address which all bridges share.
,QGH[ A D activity monitor 4-26, 6-2 address aging 4-28 administration, switch, list of tasks 4-2 ANSI terminal, see also DEC VT100 terminal emulation ATS20 download password 4-7 automatic mode 6-14 auto-negotiation 1-1 DEC VT100 terminal emulation Preface-iii, 4-19 default VLAN, 5-1 default domain name parameter 4-7 destination port 6-23 DHCP 2-4 disabling, port 4-5 discarding, packet 4-28 Domain Name Server (DNS) 4-7 download password 4-7, 4-26 downloading software 4-25 dumb terminal 4-6 B backpuress
Index global configuration 4-33 graphs, statistics, interpretation of 6-34 N half-duplex 4-17 hello time 4-30 name restriction 4-12 naming port 4-11–4-13 switch 4-8–4-10 network downloads, software 4-24 I O intruder protection 6-12, 6-17, 6-17–6-18 IP address 2-4, 4-6 IP commands 4-7 IP parameters IP address 2-3 setting through Omega 4-6–4-7 SNMP strings 4-7 Omega 6-18 source address table (SAT) 6-12–6-18 H L learning mode 6-14 learning, bridge 4-28 limit, MAC Address 6-21 link state, port 6-27 lo
AT-S20 User’s Guide S SAT (Source Address Table) 6-13 secure mode 6-13 security 6-18 Security Threshold 6-20 security threshold 6-15 security threshold, setting 6-20 Security/Source Address Table 6-12 setting, MAC Address 6-20 setting, security threshold 6-20 setting, source address 6-19 SNMP community strings 4-7 SNMP MIB 6-17 SNMP trap message 6-17 software upgrades network downloads 4-24–4-26 source address learning Mode 6-12 source address learning mode 6-19 source address setting 6-19 source address t
