Management Software ® AT-S21 ◆ User’s Guide For use with AT-8118, AT-8118XL, AT-8124XL and AT-8126XL products PN 613-10727-00 Rev.
Copyright 1998-1999 Allied Telesyn International, Corp. 960 Stewart Drive Suite B, Sunnyvale, CA 94086 USA 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.
7DEOH#RI#&RQWHQWV Preface .............................................................................................................................................................................................................................................. v Purpose of This Guide .....................................................................................................................................................................................................................
7DEOH#RI#&RQWHQWV Chapter 3 Configuration ............................................................................................................................................................................................................................ 3-1 IP Parameters .................................................................................................................................................................................................................................
3UHIDFH This guide documents the procedures to use Omega, the management software (model AT-S21) that is pre-installed in AT-8118, AT-8118XL, AT-8124XL, and AT-8126XL Fast Ethernet switches from Allied Telesyn. 3XUSRVH#RI#7KLV#*XLGH This guide is written for network administrators who are responsible for configuring the management software and managing the switches.
'RFXPHQW#&RQYHQWLRQV Chapter 5, Diagnostics, describes the testing procedures to implement in case the switch malfunctions. Appendix A, Spanning Tree Concepts, briefly describes the Spanning Tree Protocol (STP) as implemented by Allied Telesyn on the switches. Index, at the end of this guide, is according to subject matter.
$70654#8VHU·V#*XLGH '(𗲙 7HUPLQDO &RQILJXUDWLRQ If you are using the 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 or Type the first character of the option you want at the prompt and then press . If two or more options have matching initial characters, type the initial character enough times until the option you want is highlighted; then press .
'RFXPHQW#&RQYHQWLRQV *HQHULF#+'XPE, 7HUPLQDO &RQILJXUDWLRQ If you are using the generic (dumb) terminal configuration: When directed To select an option You must Type the first character of the option you want and then press . If two or more options have matching initial characters, type enough characters for Omega to distinguish your choice from the other options; then press . To guide you, the characters you must type are in uppercase.
$70654#8VHU·V#*XLGH If you enable another option, Omega moves the > to the new option. For example: Enable this port > Disable (partition) this port 0HQXV Menus and submenus are represented in courier type. In this guide, menu hierarchies are separated by a >. Menu: System configuration Menu: System configuration>IP parameters 8VHU06XSSOLHG 9DULDEOHV Variables are information you must supply, such as IP addresses, MAC addresses, or port numbers.
:KHUH#WR#)LQG#5HODWHG#*XLGHV :KHUH#WR#)LQG#5HODWHG#*XLGHV Allied Telesyn wants our customers to be well informed by providing the most up-to-date and most easily accessible way to find our guides and other technical information. Visit our website at: www.alliedtelesyn.
&KDSWHU#4 ,QWURGXFWLRQ This chapter describes: ❑ The features of AT-S21 Management Software for the AT-8118, AT-8118XL, AT-8124XL, and AT-8126XL Fast Ethernet switches ❑ An overview of the networking environments for you to optimize AT-S21’s management features Make sure the switch is installed in the network and operating normally.
6RIWZDUH#)HDWXUHV 6RIWZDUH#)HDWXUHV The AT-S21 software provides the following management features: 1-2 ❑ Factory-installed and ready to use ❑ Support for management through a web browser ❑ User configuration for per-port packet switching: store-andforward or, for 100 Mbps only, fragment-free cut-through ❑ Auto-negotiation for full- or half-duplex and 10 Mbps or 100 Mbps speed ❑ Bridging support, including Spanning Tree Protocol (STP) ❑ System configuration, management, and diagnostics using A
$70654#8VHU·V#*XLGH /RFDO#0DQDJHPHQW The switch’s software is factory-installed and ready to use. You can access the management menus (Omega Local) by directly connecting a terminal or a PC to the switch’s RS232 port on the front panel (Figure 1-1) and using your terminal emulator program.
5HPRWH#0DQDJHPHQW#,Q#7&32,3#1HWZRUNV 5HPRWH#0DQDJHPHQW#,Q#7&32,3#1HWZRUNV In a TCP/IP network, the switch requires a set of IP parameters, such as a unique IP address and subnet mask, for communication. The switch obtains its IP parameters in one of the following ways: 7&32,3#:LWK %RRW3#RU#'+&3 ❑ You assign the IP parameters through Omega’s System configuration>IP Parameters menu (described later in Chapter 2, the section on Menu Navigation Using the Terminal Interface on page 2-5).
$70654#8VHU·V#*XLGH 0DQDJHPHQW#7KURXJK#D#:HE#%URZVHU Those familiar with web browsers such as Netscape Navigator® can access Omega menus by entering the switch’s IP address (or a unique name) in the URL field.
&KDSWHU#5 *HWWLQJ#6WDUWHG This chapter describes ways to start Omega after you have installed the switch on the network.
&RQQHFWLQJ#D#7HUPLQDO#DQG#6WDUWLQJ#D#/RFDO#6HVVLRQ &RQQHFWLQJ#D#7HUPLQDO#DQG#6WDUWLQJ#D#/RFDO#6HVVLRQ This procedure applies if: ❑ You are managing the switch locally. ❑ You are managing the switch in a TCP/IP environment and you are configuring IP parameters for the first time. 1. Connect a terminal or PC directly to the switch’s RS232 port and configure the terminal or emulation program as follows: VT100 emulation 8 data bits 1 stop bit No parity 9600 bps 2. Press .
$70654#8VHU·V#*XLGH 6ZLWFK#'HIDXOW#6HWWLQJV 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 to the RS232 port located on the front panel of the switch and begin the terminal emulation program. 2. Press 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.
6ZLWFK#'HIDXOW#6HWWLQJV Table 2-1 Default Settings Settings 2-4 Default IP Address 0.0.0.0 Subnet Mask 0.0.0.0 Gateway Address 0.0.0.
$70654#8VHU·V#*XLGH 0HQX#1DYLJDWLRQ#8VLQJ#WKH#7HUPLQDO#,QWHUIDFH As a default, Omega’s terminal interface is configured to use a DEC VT100 or ANSI terminal, or an equivalent terminal emulator program. 'LVSOD\LQJ 6XEPHQXV At startup, Omega highlights the first item on the main menu (Figure 2-1 on page 2-2). To select a menu option: 1. Press the up (↑), down (↓), left (←), or right (→) arrow key to highlight an option. 2. Press .
0HQX#1DYLJDWLRQ#8VLQJ#WKH#7HUPLQDO#,QWHUIDFH (QWHULQJ#RU 0RGLI\LQJ ,QIRUPDWLRQ Omega precedes type-in fields with the -> symbol. To configure the switch’s name: 1. Select System configuration>System name to display the System Configuration Menu. The first option, System name, is highlighted. 2. Configure the switch name at the prompt as follows: ❑ Press at the highlighted area to insert a type-in field and enter a text string.
$70654#8VHU·V#*XLGH &RQILJXULQJ#,3#3DUDPHWHUV Skip this section if you have a non-TCP/IP network or if you have TCP/IP but use a BootP or DHCP server to provide IP parameters. This procedure provides the minimum IP configurations you need to enter so that the switch can be part of your TCP/IP network. Assigning a unique IP address to the switch provides an advantage: the switch uses the same IP parameters despite resets and power cycles. 1. Select System configuration>IP Parameters from the main menu. 2.
0HQX#1DYLJDWLRQ#8VLQJ#$#:HE#%URZVHU 0HQX#1DYLJDWLRQ#8VLQJ#$#:HE#%URZVHU This guide is primarily based on the web browser interface. To use the web browser interface, make sure your switch has been assigned a unique IP address or a switch name (see previous section). This section shows you how to: ❑ Configure your web browser to access the switch’s Omega menus. ❑ Use the browser’s navigational tools in combination with Omega’s commands to configure the switch.
$70654#8VHU·V#*XLGH The switch view appears as shown in Figure 2-4: Links to Allied Telesyn’s web page (to the Internet) Netscape Navigator’s toolbar Main menu Port area Figure 2-4 The Switch View 3. Select, that is, click on, menu items as follows: Select the front panel of the switch to select an option or display information. Depending on the area you click, you either start from a list of all ports or you select a specific port.
0HQX#1DYLJDWLRQ#8VLQJ#$#:HE#%URZVHU Select Send Email to submit feedback, questions, or any other information to Allied Telesyn. Select What’s New? to find out about Allied Telesyn’s latest product offerings. Figure 2-5 shows additional examples on how the Omega menus work. Click on Port 6 from the list of ports... ...
$70654#8VHU·V#*XLGH 'LVSOD\LQJ 6XEPHQXV Underlined text on the display indicates it is a selectable item that, when selected, displays another menu or execute a command. For example, in Figure 2-5, clicking on a specific port number (Port 6) from the port list displays a menu specific to Port 6.
5HVHWWLQJ#WKH#6ZLWFK 5HVHWWLQJ#WKH#6ZLWFK You may occasionally need to reset the switch. There are three ways to do so: 2-12 ❑ Use the switch’s RESET button on the front panel to perform a hardware reset on the switch. Press this button with a pointed object, such as a ballpoint pen. ❑ Use Omega’s Reset and restart option. This option enables you to perform a software reset from a local terminal or from a remote location via Telnet or the web browser.
$70654#8VHU·V#*XLGH $ERXW#2SWLRQDO#&RQILJXUDWLRQV# Other than assigning the switch’s IP address for a TCP/IP network, you do not need to change the default settings in the management software. On the other hand, network administrators may prefer to use the configurable options for their individualized switch performance. For example: ❑ Name the switch and its ports An IP or MAC address is enough to communicate with the switch on the network, however, names are descriptive and easy to remember.
0HQX#7UHH 0HQX#7UHH The following Omega menu tree is provided for your easy reference. Port status and configuration Port number Receive Statistics Graph Enable this port Disable (partition) this port Auto negotiate Full duplex Half duplex Store-and-forward Cut-through (100 Mbps operations) Port name Administration Ethernet Statistics Receive Statistics Graph (all ports) Update Software in another system Individual port overview . . .
$70654#8VHU·V#*XLGH Virtual LANs Virtual LAN definitions Port to VLAN configuration MAC Address Table Bridging Spanning tree parameters Show all MAC addresses Bridge Priority Max Age Time Hello Time Forwarding Delay By port MAC addresses All static MAC addresses Per port static MAC addresses Port spanning tree configuration Enable spanning tree for all ports Enable spanning tree by port Multicast addresses Clear static MAC table Disable spanning tree for all ports Disable spanning tree by port
&KDSWHU#6 &RQILJXUDWLRQ This chapter describes the following procedures to optimize your switch configurations: ❑ IP Parameters on page 3-2 ❑ Port Configuration on page 3-4 ❑ Spanning Tree Configuration on page 3-7 ❑ System Configuration on page 3-10 ❑ Terminal Configuration on page 3-15 ❑ Virtual LAN Configuration on page 3-17 The procedures in this chapter are the same for Omega’s terminal interface and the web browser interface.
,3#3DUDPHWHUV ,3#3DUDPHWHUV Menu: System configuration>IP parameters This option applies to TCP/IP networks only. As described in Chapter 2, the section on Configuring IP Parameters on page 2-7, the switch requires a minimum set of IP parameters in order to be part of a TCP/IP network. Other IP parameters have default values or do not require entries. If you have a BootP or DHCP server, those servers provide IP configurations to the switch as long as you configure the servers with the switch’s MAC address.
$70654#8VHU·V#*XLGH The software automatically searches for this password during downloads without requiring you to enter it. This password is different from the optional system password you configure to protect the switch from unauthorized use. See the related procedure, Software Downloads, in Chapter 4. SNMP Community strings: The following default community strings are provided: Get - public Set - private Trap - public You have the option to keep or change them.
3RUW#&RQILJXUDWLRQ 3RUW#&RQILJXUDWLRQ Menu: Port status and configuration> Figure 3-1 Port Configuration Menu The switch’s port configurations are set to the following defaults: 3-4 ❑ Status - Ports enabled ❑ Link - Offline until there is a valid physical link to a device ❑ Transmit Mode - Auto-negotiating for speed and duplex transmission ❑ Switching Mode - Store-and-forward ❑ Port Name - No name assigned
$70654#8VHU·V#*XLGH 'HVFULSWLRQ#RI 2SWLRQV Enable or disable the port Ports are enabled as a default. In case of a network problem, you may want to disable a port to prevent problem packets from being forwarded. Once the problem is fixed, you may enable the port again to resume normal operation. You can also disable an unused port to secure it from unauthorized connections. Transmission mode The 10Base-T/100Base-TX ports auto-negotiate as a default, while FX ports are fixed at 100 Mbps.
3RUW#&RQILJXUDWLRQ 3RUW#1DPLQJ To name a port 1. Select Port Status and configuration to display a list of ports. 2. Select a port number from the list to display the Port Status Menu. 3. Enter a name of up to 20 characters in the Port name field. 4. Return to the Port Status Menu to see the new name displayed on the port list. Figure 3-2 Port List Sample )L[HG#3RUW#1DPHV Omega reserves port numbers for the management port and any optional uplinks.
$70654#8VHU·V#*XLGH 6SDQQLQJ#7UHH#&RQILJXUDWLRQ Menu: Bridging Caution The default Spanning Tree Protocol (STP) parameters are adequate for most networks. Changing them without prior experience and understanding of how STP works might have a negative effect on your network. The spanning tree algorithm prevents data loops when end stations in extended networks send and receive packets through bridges. The switch operates as a bridge to Ethernet ports.
6SDQQLQJ#7UHH#&RQILJXUDWLRQ &RQILJXULQJ 6SDQQLQJ#7UHH 3DUDPHWHUV Menu: Bridging>spanning tree parameters This option allows you to change the following spanning tree parameters. The default values are: Bridge Priority: Max Age Time: Hello Time: Forwarding delay: 32768 20 2 15 Bridge Priority: The number can be from 0 to 65,535, with 0 being the highest priority. The number consists of a 2-byte bridge priority number and a 6-byte MAC address.
$70654#8VHU·V#*XLGH &RQILJXULQJ#WKH 5RRW#3RUW Menu: Bridging>Port spanning tree configuration >Enable spanning tree for all ports >Disable spanning tree for all ports To enable a specific ports spanning tree, select >Enable spanning tree for all ports, then choose the port. The root port is chosen by a bridge as that bridge’s preferred path to the root bridge. To prevent data loops, there must only be one root port per bridge.
6\VWHP#&RQILJXUDWLRQ 6\VWHP#&RQILJXUDWLRQ Menu: System configuration Figure 3-3 System Configuration Menu The System configuration options are set to the following defaults: 3-10 ❑ No name is assigned to the system (switch). ❑ MAC address aging time is 300 seconds. ❑ Access to Omega via a local console, through a remote system, and through the Word Wide Web is enabled. ❑ No password is configured. ❑ The timeout value is five minutes. ❑ No IP parameters are configured.
$70654#8VHU·V#*XLGH 1DPLQJ#WKH 6ZLWFK To name the switch 1. Select System configuration>System name. 2. Enter a unique name of up to 20 characters in the type-in field. The switch’s name must be unique within the subnet. The name you entered appears at the top of the screen, and will display on every Omega screen from now on. In subsequent Omega sessions, you may use the switch name instead of its MAC or IP address to connect to the switch from a remote location. To delete or change the switch’s name 1.
6\VWHP#&RQILJXUDWLRQ &RQILJXULQJ 2PHJD Menu: System configuration>Omega Options Figure 3-4 Omega Configuration Screen Omega default options consist of the following: Password: No password is initially required to access Omega. Timeout : The default is 5 minutes. A timeout value is one way to protect the switch from unauthorized use in case you forget to exit Omega and then leave the switch unattended.
$70654#8VHU·V#*XLGH &RQILJXULQJ#D 3DVVZRUG To configure a password 1. Select System configuration>Omega Options. 2. Enter a string of up to 20 characters in the Password field. The text string displays as a series of asterisks. The next time you restart Omega, you must enter this password before you can start a session. A user name is not required. This password is not related to the download password for downloading software to the switch (described in the section, IP Parameters in this chapter).
6\VWHP#&RQILJXUDWLRQ %DFNSUHVVXUH Menu: System configuration>No backpressure Backpressure is disabled as a default. Note Although listed in the software, this option is not available and should remain disabled. In half-duplex mode, the switch implements the backpressure methodology when its input buffer is running out of resources; for example, outbound packets are traversing a single uplink port.
$70654#8VHU·V#*XLGH 7HUPLQDO#&RQILJXUDWLRQ Menu: System configuration>Terminal Configuration Omega supports two types of terminal configuration options: 97433 &RPSDWLEOH#RU $16, ❑ VT100-compatible or ANSI (the default) ❑ Generic (dumb) terminal For this type of terminal, the enabled options are preceded by a > and also appear brighter. To use the menus in a VT100-compatible type of terminal configuration Press to enable the option that is already highlighted.
7HUPLQDO#&RQILJXUDWLRQ Enter the letter corresponding to your choice if choices are preceded by letters. For example, if your choices are: A: B: C: D: E: IP address:Null (not configured) Subnet mask:Null (not configured) Gateway address:Null (not configured) Domain Name Server:Null (not configured) Default Domain Name:Null (not configured) Enter A for IP address or B for subnet mask. Enter the letter corresponding to your choice if choices are preceded by numbers.
$70654#8VHU·V#*XLGH 9LUWXDO#/$1#&RQILJXUDWLRQ Menus: Virtual LANs Figure 3-5 Virtual LANs Menu This switch supports port based VLANs only. By default, the switch has one VLAN (all ports’ VLAN assignment showing as Default VLAN) and one spanning tree. In most situations, users find the defaults acceptable and do not require further configuration; however, your network may require assigning end stations into logical groupings, regardless of their physical location.
9LUWXDO#/$1#&RQILJXUDWLRQ The number of configurable VLANs depends on the switch’s port count, including the RS232 management port and any optional uplink ports. The AT-8118 and AT-8118XL each have 16 base ports, with none, one, or two optional uplink ports, for a total count of 16, 17, or 18 ports. The AT-8124XL has 24 ports. The AT-8126XL has 24 base ports wih none, one, or two optional uplink ports, for a total count of 24, 25, or 26 ports.
$70654#8VHU·V#*XLGH 'HILQLQJ#WKH 9/$1V Menu: Virtual LANs To define VLANs In this procedure, you will configure two VLANs: East and West. 1. Select Virtual LANs from the main menu to display the Virtual LAN Menu. 2. Select Virtual LAN definitions to display the VLAN Definition Menu. As this screen shows, there is one VLAN on the list: Default VLAN. Figure 3-8 VLAN Definition Menu 3. Select Add new table entry to display the next screen. 4. Enter the name East in the type-in field. 5.
9LUWXDO#/$1#&RQILJXUDWLRQ To delete or rename VLANs 1. Select Virtual LANs>Virtual LAN definitions to display the list of VLANs similar to the following screen (four VLANs are defined for illustration purposes): 2. Select the VLAN name you want, for example, Upper Deck; then: ❑ To delete the name from the list, enter a single asterisk (*). ❑ To rename the VLAN, enter the new name. You cannot delete Default VLAN but you can rename it.
$70654#8VHU·V#*XLGH $GGLQJ#3RUWV#WR WKH#9/$1 Menu: Virtual LANS>Port to VLAN configuration In this procedure, you will assign Ports 1-12 to East. 1. Select Port to VLAN configuration from the Virtual LANs menu to get the list of ports and their VLANs, similar to the screens in Figure 3-7, on page 3-18. 2. Select the port number, for example, 1, to get the port’s VLAN configuration screen that displays a list of defined VLANs. 3. Select East. 4.
:KHUH#WR#*R#1H[W To delete a port from a VLAN or change a port’s VLAN assignment 1. Select Port VLAN configuration from the Virtual LANs menu to display the port list with VLAN assignments (similar to Figure 3-7). 2. Select the port number you want to delete or change. The screen displays the port’s VLAN configuration and a list of available VLANs (similar to Figure 3-9). 3. Do one of the following: ❑ To reassign the port to another VLAN, select the new VLAN name from the list.
&KDSWHU#7 0RQLWRULQJ#DQG#$GPLQLVWUDWLRQ This chapter describes the procedures to monitor and operate your switch.
$FWLYLW\#0RQLWRU $FWLYLW\#0RQLWRU Menu: Administration>Activity Monitor The Activity Monitor option is useful in troubleshooting or in monitoring switch activity, if any. The activity monitor automatically activates when you download software to switches on the network (System administration>Broadcast updated software to all systems). Figure 4-1 shows another switch activity displayed by the monitor, that is, the results of ping commands issued from the switch.
$70654#8VHU·V#*XLGH &RQQHFWLRQ#WR#D#5HPRWH#6ZLWFK# Menu: Administration>Connect to a remote system This option allows you to use a switch to connect to and manage another switch from Omega. This feature is only available if you are connected to the switch for a local software management session using the RS232 port. 1. Select Administration>Connect to a remote system. 2.
&RQQHFWLYLW\#9HULILFDWLRQ#+3LQJ, &RQQHFWLYLW\#9HULILFDWLRQ#+3LQJ, Menu: Administration>Ping a remote system The ping command enables you to test if an end system can be reached by sending it an Internet control message protocol (ICMP) echo request. If the system is connected to the network, it sends a reply to the requesting system. 1. Select Administration>Ping a remote system to see the following display: Figure 4-2 Ping Menu 2.
$70654#8VHU·V#*XLGH (WKHUQHW#6WDWLVWLFV Menu: 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, all ports taken together Statistics are a tool for diagnosing a problem and isolating it to a specific port. You can view graphs that show information on the switch as a whole.
(WKHUQHW#6WDWLVWLFV 5HFHLYHG 6WDWLVWLFV To view received statistics at the switch level Select Ethernet Statistics from the main menu to display the Receive Statistics Graph similar to Figure 4-2. The graph shows the types of frames the switch has received over a period since the switch’s last reset or since someone has last set the counters to zero. See Table 4-1 for a definition of received frames.
$70654#8VHU·V#*XLGH To view received statistics per port 1. Select Individual Port Overview from the Receive Statistics Graph screen to display a list of ports. 2. Select a port number, for example, Port 1. The screen displays a graph at the port level, similar to Figure 4-5. Figure 4-5 Graph of a Port’s Received Frames Note You may also view an individual port’s receive statistics through the Port status and configuration> menu.
(WKHUQHW#6WDWLVWLFV Figure 4-6 Sample Graph of a Single Frame Type on All Ports 7UDQVPLW#)UDPHV Menu: Ethernet Statistics>Transmit Statistics To view transmit statistics Select Transmit statistics to display the Transmit Statistics Graph similar to Figure 4-7. Figure 4-7 Sample Graph of Transmitted Frames The graph shows the types of frames the switch has transmitted over a period since the switch’s last reset or since someone has set the counters to zero.
$70654#8VHU·V#*XLGH Expect transmit errors to be very small. The switch may receive a number of bad frames, but the switch drops those and sends only good frames. See Table 4-2 for a definition of transmit frames.
(WKHUQHW#6WDWLVWLFV ,QWHUSUHWLQJ#WKH *UDSKV The statistics graphs show the types of received and transmitted frames since the last time the counters or the switch were reset. The counters and the graph dynamically increment as the switch processes frames over a period of time. When the individual counters reach a maximum of 232 (over 4 billion), they reset to zero.
$70654#8VHU·V#*XLGH 0$&#$GGUHVV#7DEOH Menu: MAC Address Table Figure 4-8 MAC Address Menu The MAC address table (also referred to as the forwarding table) is a snapshot of source MAC addresses that the switch has learned and stored in its volatile memory. The switch can store up to 16K addresses. The information on the table dynamically changes as packets bearing source addresses appear on any port. The table flows into a second page as more addresses are detected by all ports.
0$&#$GGUHVV#7DEOH To display the MAC address table 1. Select MAC Address Table from the main menu. 2. Select Show all MAC addresses to get a screen similar to Figure 4-9. Figure 4-9 Sample MAC Address Table To display the MAC address table sorted by port 1. Select MAC Address Table>By port MAC addresses to display a list of ports. 2.
$70654#8VHU·V#*XLGH 0XOWLFDVW#$GGUHVV Menu: MAC Address Table>Multicast addresses A broadcast is a transmission that sends copies of a packet to all end stations on the network. A multicast is a special form of broadcast where copies of a packet are delivered to a specific group of end stations. A multicast address is a destination address. You can configure 10 (ten) multicast addresses per switch.
0$&#$GGUHVV#7DEOH Any port may have more than one multicast address associated with it. The number of multicast addresses you can configure is limited to ten (10) per switch. Omega confirms a successful add with the following message: To change ports for multicasts To change the ports for a multicast address, for example, if you want to increase the number of ports from 5 to 6, start all over by following the procedure to configure a multicast address and add all six ports.
$70654#8VHU·V#*XLGH 6WDWLF#0$& $GGUHVVHV Menu: MAC Address Table The static MAC table also includes any configured multicast addresses. Entering static MAC addresses ensures certain devices access to the switch’s ports, because aging time, power failures, or switch resets do not affect the static MAC table. To enter a static address per port 1. Prepare a list of your devices’ MAC addresses and their port assignments. 2.
0$&#$GGUHVV#7DEOH To view the static MAC address table Select MAC Address Table>All static MAC addresses. The display is for viewing purposes only. To clear the static MAC address table 1. Select MAC Address Table>Clear static MAC table. 2. Select Yes to confirm or No to cancel. After clearing a static MAC address, wait and the display updates with the changed information; if necessary, return to the main menu and select MAC Address Table>All MAC addresses to display the updated table.
$70654#8VHU·V#*XLGH 6RIWZDUH#'RZQORDGV You can download software upgrades from one switch to one or more switches on the network using Omega; or download software via the trivial file transfer protocol (TFTP) from a TFTP server. The switches described in this guide initially use a factory-configured default password, ATS21, to authorize software downloads. You do not need to manually enter this password to download software successfully.
6RIWZDUH#'RZQORDGV 'RZQORDGLQJ 6RIWZDUH#WR#2QH 6ZLWFK Menu: Administration>Update software in another system Follow this procedure in order to: ❑ Download software to another switch on the network without physically being at the destination switch ❑ Ensure that all the switches on the network you intend to upgrade will be upgraded, since you will be manually downloading software one switch at a time 1. Select Administration>Update software in another system. 2.
$70654#8VHU·V#*XLGH 'RZQORDGLQJ 6RIWZDUH#WR#$OO 6ZLWFKHV Menu: Administration>Broadcast updated software to all systems Plan a software broadcast update during times when your network is not busy. 1. Select System administration>Broadcast updated software to all systems. The switch announces the availability of the software to all switches belonging to the same series; in turn, the switches that need the upgrade respond by sending back a “request” message.
6RIWZDUH#'RZQORDGV 8VLQJ#;0RGHP WR#'RZQORDG 6RIWZDUH Menu: Administration>XModem software update to this system Omega supports software downloads to the switch using XModem. It is assumed that you have the required setup to support this type of file transfer. This menu is not available through the web browser, because the Xmodem transfer occurs through the switch’s RS232 management port. Use the following procedure to set up your switch for an XModem transfer. 1. Launch Omega’s terminal interface. 2.
&KDSWHU#8 'LDJQRVWLFV This chapter describes the following topics: ❑ Running Diagnostics on page 5-2 ❑ Resetting Statistics Counters on page 5-3 ❑ Resetting the Switch on page 5-4 ❑ Getting Help on page 5-5 Also see the AT-8118, AT-8118XL, AT-8124XL, and AT-8126XL Fast Ethernet Switches Installation Guide that explains in detail the different ways to diagnose error conditions by interpreting the LEDs on the switch’s front and back panels.
5XQQLQJ#'LDJQRVWLFV 5XQQLQJ#'LDJQRVWLFV Menu: Administration>Diagnostics Select Diagnostics from the Administration menu to display the Diagnostics screen. Figure 5-1 shows a sample Diagnostics screen. Figure 5-1 The Diagnostics Screen The Diagnostics menu allows you to run a limited set of diagnostic tests on the switch. There are only two results: Good or Failed.
$70654#8VHU·V#*XLGH 5HVHWWLQJ#6WDWLVWLFV#&RXQWHUV Menu: Ethernet statistics>Zero all statistics on the entire system You reset 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.
5HVHWWLQJ#WKH#6ZLWFK 5HVHWWLQJ#WKH#6ZLWFK Menu: Administration>Reset and restart the system You reset the switch: ❑ 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 To reset the switch Reset the switch in one of three ways: Select Administration>Reset and restart the system; Press on the switch’s front panel; or Disconnect the power cord, then reconnect it.
$70654#8VHU·V#*XLGH *HWWLQJ#+HOS Contact Allied Telesyn’s technical support at the company’s website at www.alliedtelesyn.com.
$SSHQGL[#$ 6SDQQLQJ#7UHH#&RQFHSWV This appendix provides a brief explanation of the Spanning Tree Algorithm as implemented by Allied Telesyn on the switches. For detailed information on the operation of the Spanning Tree Algorithm, consult Section 4 of IEEE Std 802.1D, ISO/IEC 10038: 1993. The AT-8118, AT-8118XL, AT-8124XL, and AT-8126XL switches, which run the AT-S21 software, implement the IEEE 802.1D Spanning Tree Protocol (STP).
6SDQQLQJ#7UHH#3URWRFRO#)HDWXUHV 6SDQQLQJ#7UHH#3URWRFRO#)HDWXUHV The switches implement the following STP features: A-2 ❑ Compensate automatically for the failure, removal, or addition of any bridge in an active data path. ❑ Achieve port changes in short time intervals, which establishes a stable active topology quickly with a minimum of network disturbance. ❑ Use a minimum amount of communications bandwidth to accomplish the operation of the STP.
$70654#8VHU·V#*XLGH 6SDQQLQJ#7UHH#3URWRFRO#3DUDPHWHUV Several configuration parameters control the operation of the Spanning Tree Protocol. Table A-1 describes the parameters and lists each parameter’s default settings for the switch. The port numbers include the twenty-four 10Base-T or 100Base-TX ports.
6SDQQLQJ#7UHH#2SHUDWLRQ 6SDQQLQJ#7UHH#2SHUDWLRQ 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[ Numerics 100 Mbps operation see cut-through A access, 1-3 activity monitor, 4-2 adding VLAN ports, 3-21 address gateway, 3-2 manager, 3-2 multicast, 4-13 see also MAC address 2-7 aging change time, 3-11 default, 3-10 MAC address table, 3-7, 3-11 spanning tree parameter, 3-8 ANSI terminal, see DEC VT100 terminal emulation audience, this guide, v auto-negotiating port 3-5 B backpressure, 3-14 baud rates, terminal emulation, 3-16 bookmarking, use of, 2-9 BootP, 1-4, 3-2 bridge learning, 3-7 bridge prior
,QGH[ auto-negotiate port, 3-5 backpressure, 3-14 port configuration, 3-4 port enabled, 3-5 settings, switch software, 2-3 store-and-forward, 3-5 STP values, 3-8 switch software settings, 2-3 VLAN, 3-17, 3-20 Default Domain Name, 3-2 define VLANs 3-19 delay, forwarding, 3-8 delete a password, 3-13 VLAN port, 3-22 VLAN, 3-20 DHCP server, 3-2 diagnostics running, 5-2 disable port, 3-5 documentation set, list, x domain name default, 3-2 Domain Name Server, 3-2 download password, 3-2, 4-17, 4-19 downloading, s
$70654#8VHU·V#*XLGH default switch configuration, 3-4 enable or disable, 3-5 fixed port names, 3-6 management port, 3-6 naming, 3-6 number, 3-4 root, 3-9 status, 3-4 uplink, 3-6 Port Configuration Menu, 3-4 port cost, 3-9 port status and configuration port number, 3-4 Port Status Menu 3-6 ports adding VLAN, 3-21 deleting VLAN, 3-22 POST, 5-4 power-on self test, 5-4 priority bridge, 3-8 root, 3-9 protocol BPDU, 3-7 DHCP, 1-2, 1-4 STP, 1-2, 3-7 TFTP, 4-17 proxies, for web browser configuration, 2-8 purpose,
,QGH[ options, 3-10 system name, 3-11 running diagnostics, 5-2 S settings terminal configuration, 3-16 setup, 2-2 SNMP physical switch location, 3-3 SNMP Community strings, 3-3 software default settings, 2-3 downloading, 4-17 features, 1-2 software downloads Omega commands, 4-18–4-19 password, 4-17 TFTP, 4-17 XModem, 4-20 spanning tree protocol aging, 3-8 spanning tree protocol (STP) concepts A-1–A-3 configuration, 3-7–3-9 Spanning Tree Protocol (STP), 1-2 static MAC address, 4-15–4-16 statistics ethernet
$70654#8VHU·V#*XLGH W web browser configuration, proxies, 2-8 interface, menu navigation, 2-8–2-11 management, 1-5 quitting Omega, 2-11 quitting, 2-6 web-based Omega, 3-12 website, technical support, 5-5 X XModem transfer, to download software, 420 Index-5
