Management Software ® AT-S39 ◆ User’s Guide AT-8016F, AT-8024, AT-8024M, AT-8024GB, AND AT-8026FC FAST ETHERNET SWITCHES VERSION 3.
Copyright 2002 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 List of Figures ........................................................................................................................................................................................................ 8 Preface ....................................................................................................................................................................................................................11 How This Guide is Organized .......................
Table of Contents Chapter 3 Basic Switch Parameters ................................................................................................................................................................................ 34 When Does a Switch Need an IP Address? ................................................................................................................................................. 35 How Do You Assign an IP Address?...........................................................
Enabling or Disabling STP or RSTP .............................................................................................................................................................. 100 Configuring STP ................................................................................................................................................................................................. 101 Configuring a Bridge’s STP Settings .................................................................
Table of Contents Chapter 14 Broadcast Frame Control ............................................................................................................................................................................173 Broadcast Frame Control Overview ............................................................................................................................................................174 Configuring the Interval Timer ..........................................................
Chapter 22 Port Security ...................................................................................................................................................................................................... 239 Displaying the Port Security Level .............................................................................................................................................................. 240 Chapter 23 Port Trunks ...............................................................
List of Figures Figure 1: Connecting a Terminal or PC to the RS232 Terminal Port ................................................................................................. 28 Figure 2: Main Menu .......................................................................................................................................................................................... 30 Figure 3: Administration Menu .........................................................................................
Figure 38: Create a VLAN Window ............................................................................................................................................................. Figure 39: Modifying a VLAN Menu ........................................................................................................................................................... Figure 40: Show All VLANs Window ....................................................................................................
List of Figures Figure 93: Add Static MAC Address window .......................................................................................................................................... 274 Figure 94: IGMP Window - Configuration ................................................................................................................................................ 280 Figure 95: IGMP Window - Monitoring .......................................................................................
Preface This guide contains instructions on how to configure an AT-8000 Series Fast Ethernet Switch using the AT-S39 management software. The AT-8000 Series consists of the following Fast Ethernet switches: ❑ AT-8016F ❑ AT-8024 ❑ AT-8024M ❑ AT-8024GB ❑ AT-8026FC How This Guide is Organized This manual is divided into three sections. Section I: Overview This section contains just one chapter. It reviews the different ways that you can access the AT-S39 management software on a switch.
AT-S39 User’s Guide A Telnet management session is established using the Telnet application protocol. This type of management session can be performed from any workstation on your network that has the application protocol. Section III: Web Browser Management The chapters in this section explain how to manage a switch using a web browser, such as Microsoft® Internet Explorer or Netscape® Navigator, from a workstation on your network.
Section II: Local and Telnet Management 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-S39 User’s Guide Where to Find Web-based Guides The installation and user guides for all Allied Telesyn products are available in Portable Document Format (PDF) from on our web site at www.alliedtelesyn.com. You can view the documents on-line or download them onto a local workstation or server.
Section II: Local and Telnet Management Contacting Allied Telesyn To contact Technical Support by phone, find your country or region in the table below.
AT-S39 User’s Guide Management Software Updates New releases of management software for our managed products are available from our web site at www.alliedtelesyn.com and our FTP server at ftp.alliedtelesyn.com. To use the FTP server, enter ‘anonymous’ for the user name when you log in and your e-mail address for the password.
Section I Overview The chapter in this section provides a brief overview of the AT-S39 management software. It explains some of the functions that you can perform with the management software and reviews the different methods for accessing the AT-S39 software on an AT-8000 Series Fast Ethernet Switch.
Chapter 1 Overview The AT-S39 management software is intended for the AT-8000 Series Fast Ethernet Switches. The software is used to monitor and adjust a switch’s operating parameters.
Section I: Overview There are four different ways that you can access the management software on an AT-8000 Series switch. The methods are referred to as management sessions in this guide. They are: ❑ Local Management Session ❑ Telnet Management Session ❑ Web Browser Management Session ❑ SNMP Management Session The following sections in this chapter briefly describe each type of management session.
AT-S39 User’s Guide Local Management Session You establish a local management session with an AT-8000 Series switch by connecting a terminal or a PC with a terminal emulator program to the RS232 Terminal port on the front panel of the switch, using a straight-through RS-232 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.
Section I: Overview Telnet Management Session Any management workstation on your network that has the Telnet application protocol can be used to manage an AT-8000 Series switch. This type of management session is referred to in this guide as a remote management session because you do not have to be in the wiring closet where the switch you want to manage is located. You can manage the switch from any workstation on the network that has the application protocol.
AT-S39 User’s Guide Web Browser Management Session You can also use a web browser to manage a switch. This too is referred to as remote management, just like a Telnet management session. You can manage a switch from any workstation on your network that has a web browser. Note For instructions on starting this type of management session, refer to Starting a Web Browser Management Session on page 209.
Section I: Overview SNMP Management Session Another way to remotely manage the switch is with an SNMP management program. A familiarity with Management Information Base (MIB) objects is necessary for this type of management.
AT-S39 User’s Guide Management Access Levels There are two levels of management access on an AT-8000 Series switch: Manager and Operator. When you log in as a Manager, you can view and configure all of a switch’s operating parameters. When you log in as an Operator, you can only view the operating parameters; you cannot change any values. You log in as a Manager or an Operator by entering the appropriate password when you start an AT-S39 management session.
Section II Local and Telnet Management The chapters in this section explain how to manage an AT-8000 Series switch from a local or Telnet management session.
Chapter 2 Starting a Local or Telnet Management Session This chapter contains the procedure for starting a local or Telnet management session on an AT-8000 Series switch.
Section II: Local or Telnet Management Local Management Session On the front panel of the switch is a port labelled RS232 Terminal Port. You use this port to establish a local management session with the switch’s AT-S39 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-S39 User’s Guide Starting a Local Management Session To start a local management session, perform the following procedure: 1. Connect one end of a straight-through RS232 cable with a DB-9 connector to the RS232 Terminal Port on the switch. POR TB RS- DE 232 LINK MOD E TER MIN AL P ORT FAU LT MAS TER PWR Figure 1 Connecting a Terminal or PC to the RS232 Terminal Port 2. Connect the other end of the cable to an RS-232 port on a terminal or PC with a terminal emulator program. 3.
Section II: Local or Telnet Management Note The switch has an auto-detect feature that automatically determines the speed of the terminal. You use this feature by pressing any key on your keyboard within five seconds after powering on or resetting the switch. The switch responds by determining the speed of the terminal and automatically configuring the speed of the RS232 Terminal Port accordingly. Otherwise, the switch uses a default baud rate of 9600 bits per second (bps).
AT-S39 User’s Guide The Main Menu is displayed. Allied Telesyn Ethernet Switch AT-8024GB Login Session: Manager Main Menu 1 2 3 4 5 6 7 8 9 C - Port Menu VLAN Menu Spanning Tree Menu Administration Menu System Config Menu MAC Address Tables Ethernet Statistics Diagnostics Enhanced Stacking Command Line Interface Q - Quit Enter your selection? Figure 2 Main Menu To select a menu item, type the corresponding letter or number.
Section II: Local or Telnet Management Enhanced Stacking When you start a local management session on a switch that has been designated as the Master switch of an enhanced stack, you can manage all the switches in the same subnet from the same management session. This can save you the time and trouble of having to start a separate local management session each time you want to manage a switch in your network.
AT-S39 User’s Guide Telnet Management Session You can use the Telnet application protocol from a workstation on your network to manage an AT-8000 Series switch. This type of management is referred to as remote management because you do not have to be physically close to the switch to start the session, such as with a local management session. Any workstation on your network that has the application protocol can be used to manage the switch.
Section II: Local or Telnet Management Note You can run only one Telnet management session on a switch at a time. Additionally, you cannot run both a Telnet management session and a local management session on the same switch at the same time. Quitting from a Telnet Management Session To end a Telnet management session, return to the Main Menu and type Q for Quit.
Chapter 3 Basic Switch Parameters This chapter contains a variety of information and procedures. There is a discussion on when to assign an IP address to a switch and the different ways that you can go about it. There are also procedures for resetting the switch, activating the original switch default settings, and more.
Section II: Local and Telnet Management When Does a Switch Need an IP Address? One of the tasks to building or expanding a network is deciding which of the managed switches need to be assigned unique IP addresses. The rule used to be that a managed switch needed an IP address if you wanted to manage it remotely, such as with the Telnet application protocol. However, if a network contained a lot of managed switches, having to assign each one an IP address was often cumbersome and time consuming.
AT-S39 User’s Guide How Do You Assign an IP Address? Once you have decided which, if any, switches on your network need an IP address, you have to access the AT-S39 software on the switches and assign the addresses. There are actually two ways in which a switch can obtain an IP address. The first method is for you to assign the IP configuration information manually. The procedure for this is explained in the next procedure.
Section II: Local and Telnet Management Configuring an IP Address and Switch Name The procedure in this section explains how to manually assign an IP address, subnet mask, and gateway address to the switch from a local or Telnet management session. (If you want the switch to obtain its IP configuration from a DHCP or BOOTP server on your network, go to the procedure Activating the BOOTP and DHCP Services on page 40.
AT-S39 User’s Guide 2. Change the parameters as desired. The parameters in the IP Parameters window are described below: 1 - 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, or if you want a switch to function as the Master switch of an enhanced stack. 2 - Subnet Mask This parameter specifies the subnet mask for the switch.
Section II: Local and Telnet Management 9 - Reset Switch This selection resets the switch. A - Server-based Authentication This selection is used to configure the TACACS+ and RADIUS authentication protocols on the switch. For information on this feature, refer to Chapter 15, TACACS+ and RADIUS Protocols on page 179. X - Xmodem Downloads and Uploads For information on this selection, refer to Chapter 17, File Downloads and Uploads on page 193.
AT-S39 User’s Guide Activating the BOOTP and DHCP Services The BOOTP and DHCP application protocols were developed to simplify network management. They are used to automatically assign IP configuration information to the devices on your network, such as an IP address, subnet mask, and a default gateway address. An AT-8000 Series switch supports these protocols and can obtain its IP configuration information from a BOOTP or DHCP server on your network.
Section II: Local and Telnet Management Note If you activated BOOTP/DHCP, the switch immediately begins to query the network for a BOOTP or DHCP server. The switch will continue to query the network for its IP configuration until it receives a response.
AT-S39 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. From the Main Menu, type 5 to select System Config Menu. The System Configuration Menu in Figure 4 is displayed. Allied Telesyn AT-8024 Ethernet Switch Login Session: Manager System Config Menu 1 2 3 4 5 6 7 8 - MAC Aging Time ...................
Section II: Local and Telnet Management 3. From the Advanced Configuration window, type 3 to select SNMP Configuration. The SNMP Configuration window in Figure 6 is displayed. Allied Telesyn AT-8024 Ethernet Switch Login Session: Manager SNMP Configuration 1 - GET Community .............. public 2 - SET Community .............. private 3 - Trap Community ............. public 4 5 6 7 - Trap Trap Trap Trap Receiver Receiver Receiver Receiver 1 2 3 4 ............ ............ ............ ............
AT-S39 User’s Guide Resetting a Switch To reset a switch, perform the following procedure: 1. From the Main Menu, type 4 to select Administrator Menu. 2. From the Administrator Menu, type 9 to select Reset Switch. The following prompt is displayed: Do you want to proceed with the switch reboot? [Yes/No] -> 3. Type Y to reset the switch or N to cancel this procedure. The following prompt is displayed: Please press key TWICE to proceed with the Switch Reset... 4. Press the Return key twice.
Section II: Local and Telnet Management Configuring the AT-S39 Software Security Features The AT-S39 software has several security features that can help prevent unauthorized individuals from changing the parameter settings of an AT-8000 Series switch. The security features are: ❑ Manager and Operator Passwords - The management software has two standard, management login accounts: Manager and Operator.
AT-S39 User’s Guide Configuring the Management Passwords There are two levels of management access on an AT-8000 Series switch: Manager and Operator. When you log in as a Manager, you can view and configure all of a switch’s operating parameters. When you log in as an Operator, you can only view the operating parameters; you cannot change any values. You log in as a Manager or an Operator by entering the appropriate password when you start an AT-S39 management session.
Section II: Local and Telnet Management Configuring Management Access To configure the console timer, web access, SNMP access, and TFTP server security features of the AT-S39 management software, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. The System Configuration Menu Figure 4 on page 42 is displayed. 2. To configure the console timer, type 3 to select Console Disconnect Timer Interval and, when prompted, enter a value of from 1 to 60 minutes.
AT-S39 User’s Guide Viewing the AT-S39 Version Number and Switch MAC Address The procedure in this section displays the following switch information: ❑ AT-S39 version number ❑ Bootloader version number ❑ Serial number ❑ MAC Address To display the information, type 8 to select Diagnostics from the Main Menu. The Diagnostics window in Figure 8 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Diagnostics 1 2 3 4 5 6 7 - Application Software Version .... AT-S39 v3.
Section II: Local and Telnet Management Pinging a Remote System You can instruct the switch to ping a remote device on your network. This procedure is useful in determining whether a valid link exists between the switch and another device. To ping a network device, perform the following procedure: 1. From the Main Menu, type 4 to select Administration Menu. 2. From the Administration Menu, type P to select Ping a Remote System. The following prompt is displayed: Please enter an IP address -> 3.
AT-S39 User’s Guide Returning the AT-S39 Software to the Factory Default Values The procedure in this section returns all AT-S39 software parameters to their default values. This procedure also deletes any VLANs that you have created on the switch. Note The AT-S39 software default values can be found in Appendix A, AT-S39 Default Settings on page 293. To return the AT-S39 management software to its default settings, perform the following procedure: 1.
Section II: Local and Telnet Management Configuring the Console Startup Mode You can configure the AT-S39 software to display either the Main Menu or the command line interface prompt ($) whenever you start a local management session. The default is the Main Menu. To change the console startup mode, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2. From the System Configuration Menu, type 7 to select Console Startup Mode.
Chapter 4 Enhanced Stacking This chapter explains the enhanced stacking feature.
Section II: Local and Telnet Management Enhanced Stacking Overview The enhanced stacking feature can make it easier for you to manage the AT-8000 Series switches in your network. It offers the following benefits: ❑ You can manage up to 24 switches from one local or remote management session. This eliminates the need of having to initiate a separate management session for each switch in your network. ❑ The switches can share the same IP address.
AT-S39 User’s Guide 2. You must assign the master switch an IP address and subnet mask. A master switch must have an IP address and subnet mask. The other switches in an enhanced stack, referred to as slave switches, do not. If an enhanced stack will have more than one master switch, you must assign each master switch a unique IP address.
Section II: Local and Telnet Management Example Figure 9 is an example of the enhanced stacking feature. Master 1 IP Address 149.32.11.22 Master 2 IP Address Subnet A 149.32.11.16 Router TROP LANIMRET 232-SR TLUAF RETSAM RWP Subnet B Master 1 IP Address 149.32.09.18 Master 2 IP Address 149.32.09.24 Figure 9 Enhanced Stacking Example The example consists of a network of two subnets interconnected with a router.
AT-S39 User’s Guide Setting a Switch’s Enhanced Stacking Status The enhanced stacking status of the switch can be master switch, slave switch, or unavailable. Each status is described below: ❑ Master switch - A master switch of a stack can be used to manage all the other AT-8000 Series switches in a subnet. Once you have established a local or remote management session with the Master switch, you can access and manage all the switches in the subnet. A master switch must have a unique IP address.
Section II: Local and Telnet Management The window displays the current status of the switch at the end of selection “1 - Switch State.” For example, the switch’s current status in the figure above is Master. Note The “2 - Stacking Services” selection in the window is available only on master switches. 2. To change a switch’s stacking status, type 1 to select Switch State. The following prompt is displayed. Enter new setup (M/S/U) -> 3.
AT-S39 User’s Guide Selecting a Switch in an Enhanced Stack The first thing that you should do before performing any procedure on a switch in an enhanced stack is check to be sure that you are performing it on the correct switch. If you assigned system names to your switches, this should be easy. The name of the switch being managed is always displayed at the top of every management window.
Section II: Local and Telnet Management 3. Type G to select Get/Refresh List of Switches. The Master switch polls the network for all slave and Master switches in the subnet and displays a list of the switches in the Stacking Services window. Note The Master switch on which you started the management session is not included in the list, nor are any switches with an enhanced stacking status of Unavailable.
Chapter 5 Port Parameters The chapter contains procedures for viewing and changing the parameter settings for the individual ports on a switch.
Section II: Local and Telnet Management Displaying Port Status To display the status of the ports on the switch, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. The Port Menu in Figure 12 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Port Menu 1 2 3 4 5 - Port Port Port Port Port Configuration Mirroring Trunking Status Security S - Save Configuration Changes R - Return to Previous Menu Enter your selection? Figure 12 Port Menu 2.
AT-S39 User’s Guide The Port Status window is displayed. Figure 13 is an example of the window.
Section II: Local and Telnet Management MDIO The operating configuration of the port. Possible values are Auto, MDI, MDI-X. The status Auto indicates that the port is automatically determining the appropriate MDI or MDI-X setting. Spd The operating speed of the port. Possible values are: 10 - 10 Mbps 100 - 100 Mbps 1000 - 1000 Mbps (AT-8024GB switch only) Dplx The duplex mode of the port. Possible values are half-duplex and full-duplex. PVID The port VLAN identifier currently assigned to the port.
AT-S39 User’s Guide Configuring Port Parameters To configure the parameter settings for a port on the switch, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 1 to select Port Configuration. The following prompt is displayed: Starting Port to Configure [1 to 24] -> 3. Enter the number of the port you want to configure and press Return. To configure a range of ports, enter the first port of the range.
Section II: Local and Telnet Management Note The example Port Configuration window in the figure above is for a 10/100 Mbps twisted pair port. The window for a fiber optic port, a GBIC module, or a stacking module will contain a subset of the parameters. 5. Adjust the port parameters as desired. You adjust a parameter by typing its number. This toggles the parameter through its possible settings. The parameters are described below. 0 - Status You use this selection to enable or disable a port.
AT-S39 User’s Guide Flow Control Flow control applies only to ports operating in full-duplex mode. The switch uses a special pause packet to stop the end node from sending frames. The pause packet notifies the end node to stop transmitting for a specified period of time. Possible settings are: None - No flow control on the port. Transmit - Flow control only as packets are being transmitted out the port. Receive - Flow control only on as packets are being received on the port.
Section II: Local and Telnet Management B - Broadcast Control For background information on this selection and instructions on how to set the option, refer to Broadcast Frame Control Overview on page 174 and Configuring the Maximum Broadcast Frame Count on page 178. 6. Once you have set the port parameters, type S to select Save Configuration Changes. Configuration changes are immediately activated on a port. The Port configuration window features a Reset Port selection.
AT-S39 User’s Guide Displaying Uplink Information The AT-S39 management software can display basic manufacturer information about a GBIC module in an AT-8024GB switch or the fiber optic ports in an AT-8026FC switch. To display uplink information, perform the following procedure: 1. From the Main Menu, type 8 to select Diagnostics. 2. From the Diagnostics window, type 7 to select Uplink Information. The GBIC Information window in Figure 15 is displayed.
Section II: Local and Telnet Management The management software displays a window containing basic information about the GBIC module. Figure 16 is an example of the window. Allied Telesyn AT-8024GB Ethernet Switch GBIC Information Menu Port Number ...................... Type of Serial Interface ......... Extended Serial Transceiver ...... Connector Type ................... Elect/Opt Transceiver ............ Shortwave laser w/o OFC M5 M6 100 MBytes/sec Serial Encoding .................. Length 9/125 mm Fib.
Chapter 6 Port Security This chapter contains the procedures for setting port security. The sections in this chapter include: ❑ Port Security Overview on page 71 ❑ Configuring Port Security on page 73 ❑ Configuring the Limited Security Mode on page 75 Note Port security does not apply to ports on GBIC modules in an AT-8024GB switch. Note Port security can only be set through a local management session, You cannot set port security from a Telnet management session.
Section II: Local and Telnet Management 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 switch. There are four levels of port security. Only one security level can be active on a switch at a time. Automatic This operating mode disables port security.
AT-S39 User’s Guide Secure This security level instructs the switch to forward frames based solely on static MAC addresses. When this security level is activated, the switch deletes all dynamic MAC addresses and disables the MAC address table so that no new addresses can be learned. The switch also deletes any addresses in the static MAC address table. Once you have activated this security level, you must enter the static MAC addresses of the nodes whose frames the switch should forward.
Section II: Local and Telnet Management Configuring Port Security Note Port security can only be set through a local management session. You cannot set port security from a Telnet management session or from a web browser management session. To set a switch’s port security level, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 5 to select Port Security. The Port Security menu in Figure 17 is displayed.
AT-S39 User’s Guide ❑ To forward frames based solely on static MAC addresses, type S to select the Secured mode. After activating this security mode, you must enter the static MAC addresses of the nodes with frames the switch is to forward. For instructions on how to add static MAC addresses, refer to Adding Static and Multicast MAC Addresses on page 159.
Section II: Local and Telnet Management Configuring the Limited Security Mode The Limited security mode lets you set a maximum number of dynamic MAC addresses each port on a switch can learn. When you activate this security level, the switch deletes all MAC addresses in the dynamic MAC address table and immediately begins to learn new addresses as frames are received on the ports.
AT-S39 User’s Guide 4. Type 2 to select Configure Limited Mode Parameters. The following prompt is displayed: Enter ports list: 5. Enter the port(s) where you want to specify a new MAC address limit. You can specify the ports individually (e.g., 1,4), as a range (e.g., 4-7), or both (e.g., 2-7,11,15). The following prompt is displayed: Enter new MAC limit -> [1 to 150] -> 6. Enter the maximum number of dynamic MAC addresses you want the port to be able to learn and press Return.
Chapter 7 Port Trunking This chapter contains the procedures for creating and deleting port trunks.
AT-S39 User’s Guide Port Trunking Overview Port trunking is an economical way for you to increase the bandwidth between two Ethernet switches. A port trunk is 2, 3, or 4 ports that have been grouped together to function as one logical path. A port trunk increases the bandwidth between switches and is useful in situations where a single physical data link between switches is insufficient to handle the traffic load.
❑ 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-8024 switches. On the first AT-8024 switch you had chosen ports 12, 13, 14, 15 for the trunk.
AT-S39 User’s Guide The switch assigns source addresses so as to evenly distribute the addresses, or at least as much as possible, across all the ports of the trunk. The intent is to try and ensure that all links in the trunk are utilized. Here is an example. Figure 20 shows two AT-8000 Series Switches, an AT8024 (Switch #1) and an AT-8024GB (Switch #2) interconnected with a port trunk of three data links. The trunk on Switch #1 consists of Ports 13 to 15 and on Switch #2 of Ports 1 to 3.
Now assume that you configured the port trunk on Switch #1 for SA load distribution. The switch might distribute the load as follow: Table 1 Switch #1 Load Distribution Source Workstation Source MAC Address Trunk Port A 00A0EE 2313A3 13 B 00A134 1A9032 14 C 00A301 9083B2 15 D 001B21 87C6D6 14 For example, when Workstation B sends a packet to the server, Switch #1 will use Port 14 of the trunk to transmit it to Switch #2.
AT-S39 User’s Guide So now let’s look at the SA/DA method. A switch using the SA/DA method creates a matrix of the source and destination MAC addresses and then uses the matrix to determine which port in the trunk a frame is to be transmitted. With this method, packets from a particular source node might be sent over different data links in a trunk when sent to different destination addresses. So let’s take a look at how this might look in practice.
Table 3 Trunk Port Assignments in an SA/DA Matrix Destinations Addresses Source Addresses 00A0EE 2313A3 00A134 1A9032 00A301 9083B2 001B21 87C6D6 00B012 DA0231 1 2 3 1 001230 DA2943 2 3 1 2 0042AA D45A21 3 1 2 3 00456A C23521 1 2 3 1 The bottom line is that the SA/DA method is more flexible than the SA method. A general rule to follow is if you are not sure which load distribution to choose, you should probably go with SA/DA.
AT-S39 User’s Guide Creating a Port Trunk This section contains the procedure for creating a port trunk on the switch. Be sure to review the guidelines in Port Trunking Overview on page 78 before performing the procedure. Caution Do not connect the cables to the trunk ports on the switches 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.
3. Type 1 to select Trunk Ports. The following prompt is displayed. Enter Trunk Port(s) -> 4. Enter the ports that will constitute the port trunk and press Return. You can specify the ports individually (e.g., 1,2,3,4) or as a range (e.g., 7-10). Once you have specified the ports of the trunk, the following menu selection appears in the window: 2 - Trunk Method ....... SA/DA trunking You can use this selection to specify the load distribution method. The default is SA/DA. 5.
AT-S39 User’s Guide Deleting a Port Trunk Caution Disconnect the cables from the port trunk on the switch before performing the following procedure. Deleting 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 from the switch, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 3 to select Port Trunking.
Chapter 8 Port Mirroring This chapter contains the procedures for creating and deleting a port mirror.
AT-S39 User’s Guide Port Mirroring Overview The port mirroring feature allows you to unobtrusively monitor the traffic being received and transmitted on one or more ports on a switch by having the traffic copied to another switch port. You can connect a network analyzer to the port where the traffic is being copied and monitor the traffic on the other ports without impacting network performance or speed.
Creating a Port Mirror To create a port mirror, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 2 to select Port Mirroring. The Port Mirroring menu in Figure 22 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Port Mirroring 1 - Mirror (Destination) Port ....... None 2 - Mirroring (Source) Port(s) ......
AT-S39 User’s Guide Deleting a Port Mirror To delete a port mirror, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 2 to select Port Mirroring. The Port Mirroring menu in Figure 22 on page 89 is displayed. 3. Type 1 to select Mirror (Destination) Port. The following prompt is displayed. Enter mirror port (0=None) [0 to 24] -> 4. Enter 0 and press Return. 5. Type S to select Save Configuration Changes. The port mirror on the switch is deleted.
Chapter 9 STP and RSTP This chapter provides background information on the Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP). The chapter also contains procedures on how to adjust the STP and RSTP bridge and port parameters. The sections in this chapter include: ❑ STP and RSTP Overview on page 92 ❑ Enabling or Disabling STP or RSTP on page 100 ❑ Configuring STP on page 101 ❑ Configuring RSTP on page 105 Note For detailed information on the Spanning Tree Protocol, refer to IEEE Std 802.
AT-S39 User’s Guide STP and RSTP Overview A significant danger to Ethernet network performance is the existence of a data loop in a network topology. A data loop exists when two or more nodes on a network can transmit data to each other over more than one data link. The problem that data loops pose is that data packets can become caught in repeating cycles, referred to as broadcast storms, that needlessly consume network bandwidth and significantly reduce network performance.
Section II: Local and Telnet Management Bridge Priority and the Root Bridge The first task that bridges perform when a spanning tree protocol is activated on a network is the selection of a root bridge. A root bridge distributes network topology information to the other network bridges and is used by the other bridges to determine if there are redundant paths in the network.
AT-S39 User’s Guide Path Costs and Port Costs 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. Where there is only one path between a bridge and the root bridge, the bridge is referred to as the designated bridge and the port through which the bridge is communicating with the root bridge is referred to as the root port.
Section II: Local and Telnet Management RSTP port cost also features an Auto-Detect feature. This features allows RSTP to automatically set the port cost according to the speed of the port, assigning a lower value for higher speeds. Auto-Detect is the default setting on the ports when the switch is operating in RSTP. Table 6 lists the ports cost with Auto-Detect.
AT-S39 User’s Guide Forwarding Delay and 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. This may trigger a change in the state of some blocked ports. However, a change in a port state is not activated immediately. It might take time for the root bridge to notify all bridges that a topology change has occurred, especially if it is a large network.
Section II: Local and Telnet Management 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-8000 Series switch. The interval is measured in seconds and the default is 2 seconds.
AT-S39 User’s Guide If a port is operating in half-duplex mode and is not connected to any further bridges participating in STP or RSTP, then the port is an edge port. Figure 24 illustrates an edge port on an AT-8024 switch. The port is connected to an Ethernet hub, which in turn is connected to a series of Ethernet workstations. This is an edge port because it is connected to a device operating at half-duplex mode and there are no participating STP or RSTP devices connected to it.
Section II: Local and Telnet Management Mixed STP and RSTP Networks RSTP IEEE 802.1w is fully compliant with STP IEEE 802.1d. Your network can consist of bridges running both protocols. STP and RSTP in the same network should be able to operate together to create a single spanning tree domain. There is no reason not to activate RSTP on an AT-8000 Series switch even when all other switches are running STP. The AT-8000 Series switch can combine its RSTP with the STP of the other switches.
AT-S39 User’s Guide Enabling or Disabling STP or RSTP To select and activate a spanning tree protocol, or to disable spanning tree, perform the following procedure: 1. From the Main Menu, type 3 to select Spanning Tree Menu. The Spanning Tree Menu in Figure 27 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Spanning Tree Menu 1 2 3 4 - Spanning Tree Status ...... Enabled Active Protocol Version ...
Section II: Local and Telnet Management Configuring STP This section contains the following procedures: ❑ Configuring a Bridge’s STP Settings on page 101 ❑ Configuring a Port’s STP Settings on page 103 Configuring a Bridge’s STP Settings This section contains the procedure for configuring a bridge’s STP settings. Caution The default STP parameters 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.
AT-S39 User’s Guide 2. Adjust the bridge STP settings as needed. The parameters are described below. 1 - 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.
Section II: Local and Telnet Management Configuring a Port’s STP Settings To adjust a port’s STP parameters, perform the following procedure: 1. From the Spanning Tree Menu, type 3 to select STP Configuration. 2. From the STP Configuration menu, type 6 to select Config STP port settings. The following prompt is displayed: Starting Port to Configure [1 to 24] -> 3. Enter the number of the port you want to configure. To configure a range of ports, enter the first port of the range.
AT-S39 User’s Guide Note A port on which STP is disabled is immediately placed in the forwarding state. It should be noted that a port where STP has been disabled cannot be placed in the blocking state by STP should there be a loop in the network topology. Consequently, it is incumbent on the network administrator to insure that no loop will develop should STP be disabled on a port. 2 - Fast Mode The port will skip the Listening and Learning stages of STP.
Section II: Local and Telnet Management Configuring RSTP This section contains the following procedures: ❑ Configuring a Bridge’s RSTP Settings on page 105 ❑ Configuring a Port’s RSTP Settings on page 107 Configuring a Bridge’s RSTP Settings This section contains the procedure for configuring a bridge’s RSTP settings. Caution The default RSTP parameters are adequate for most networks.
AT-S39 User’s Guide 2. Adjust the parameters as needed. The parameters are defined below. 1 - Force Version This selection determines whether the bridge will operate with RSTP or in an STP-compatible mode. If you select RSPT, the bridge will operate all ports in RSTP, except for those ports that receive STP BPDU packets. If you select Force STP Compatible, the bridge will operate in RSTP, using the RSTP parameter settings, but it will send only STP BPDU packets out the ports.
Section II: Local and Telnet Management 6 - Bridge Identifier The MAC address of the bridge. The bridge identifier is used as a tie breaker in the selection of the root bridge when two or more bridges have the same bridge priority value. This value cannot be changed. 7 - Root Bridge The MAC address of the bridge functioning as the root bridge in the spanning tree domain. This value is for display purposes only and cannot be changed. 8 - Root Priority The priority number of the root bridge. 3.
AT-S39 User’s Guide 5. To configure just one port, enter the same port number here as you entered in the previous step. To configure a range of ports, enter the last port of the range. The RSTP Port Configuration menu in Figure 32 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Configure RSTP Port Settings Configuring Ports 4 to 4 1 2 3 4 - Port Priority ...... Path Cost .......... Point-to-Point ..... Edge Port ..........
Section II: Local and Telnet Management 4 - Edge Port This parameter defines whether the port is functioning as an edge port. For an explanation of this parameter, refer to Point-to-Point Ports and Edge Ports on page 97. M - MCHECK This option instructs the bridge to send out RSTP BPDU packets for several seconds from the selected port. The purpose is to determine if there are any RSTP or STP bridges connected to the port.
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. This chapter also describes the Basic VLAN mode and how you can change a switch’s VLAN operating mode.
Section II: Local and Telnet Management 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-S39 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-S39 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.
Section II: Local and Telnet Management Port-based VLAN Overview As explained in the VLAN Overview section earlier in this chapter, a VLAN consists of a group of ports on one or more Ethernet switches that form 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 an interconnection device, such as a router or Layer 3 switch.
AT-S39 User’s Guide If a VLAN spans multiple switches, then the VID for the VLAN on the different switches must be the same. In this manner, the switches are able to recognize and forward frames belonging to the same VLAN even though the VLAN spans multiple switches. For example, if you had a port-based VLAN titled Marketing that spanned three AT-8024 switches, you would assign the Marketing VLAN on each switch the same VID.
Section II: Local and Telnet Management For example, assume that you were creating a port-based VLAN on a switch and you had assigned the VLAN the VID 5. Consequently, the PVID for each port in the VLAN would need to be assigned the value 5. Some switches and switch management programs require that you assign the PVID value for each port manually. However, the AT-S39 management software performs this task automatically.
AT-S39 User’s Guide Drawbacks to Port-based VLANs There are several drawbacks to port-based VLANs: ❑ It is not easy to share network resources, such as servers and printers, across multiple VLANs. A router or Layer 3 switch must be added to the network to provide a means for interconnecting the port-based VLANs. ❑ The introduction of a router into your network could create security issues from unauthorized access to your network.
Section II: Local and Telnet Management Port-based Example 1 Figure 33 illustrates an example of one AT-8024 Fast Ethernet Switch with three port-based VLANs. (For purposes of the following examples, the Default VLAN is not shown.
AT-S39 User’s Guide In the example, each VLAN has one port connected to the router. The router interconnects the various VLANs and functions as a gateway to the WAN. Port-based Example 2 Figure 34 illustrates more port-based VLANs. In this example, two VLANs span more than one Ethernet switch.
Section II: Local and Telnet Management The table below lists the port assignments for the Sales, Engineering, and Production VLANs on the switches: Sales VLAN (VID 2) Engineering VLAN (VID 3) Production VLAN (VID 4) AT-8024 Switch (top) Ports 1 - 6, 18 (PVID 2) Ports 9 - 11, 14, 20 (PVID 3) Ports 21 - 24 (PVID 4) AT-8024 Switch (bottom) Ports 1 - 6 (PVID 2) Ports 13, 19-24 (PVID 3) none ❑ Sales VLAN - This VLAN spans both switches.
AT-S39 User’s Guide Tagged VLAN Overview The second type of VLAN supported by the AT-8000 Series switch is the tagged VLAN. VLAN membership in a tagged VLAN is determined by information within the frames that are received on a port. This contrasts to a port-based VLAN, where the PVIDs assigned to the ports determine VLAN membership. The VLAN information within an Ethernet frame is referred to as a tag or tagged header.
Section II: Local and Telnet Management The parts of a tagged VLAN are much the same as those for a port-based VLAN. They are: ❑ VLAN Name ❑ VLAN Identifier ❑ Tagged and Untagged Ports ❑ Port VLAN Identifier Note For explanations of VLAN name and VLAN identifier, refer back to VLAN Name and VLAN Identifier on page 113. Tagged and Untagged Ports You need to specify which ports will be members of the VLAN. In the case of a tagged VLAN, it will usually be a combination of both untagged ports and tagged ports.
AT-S39 User’s Guide General Rules to Creating a Tagged VLAN Below is a summary of the rules to observe when creating a tagged VLAN. ❑ Each tagged VLAN must be assigned a unique VID. If a particular VLAN spans multiple switches or stacks, each part of the VLAN on the different switches or stacks must be assigned the same VID. ❑ A tagged port can be a member of multiple VLANs. ❑ An untagged port can be an untagged member of only one VLAN at a time.
Section II: Local and Telnet Management Tagged VLAN Example Figure 35 illustrates how tagged ports can be used to interconnect IEEE 802.1Q-based products. Engineering VLAN (VID 3) Legacy Server Production VLAN (VID 4) Sales VLAN (VID 2) AT-8024 Ethernet Switch AT-8024 RS-232 TERMINAL PORT 10Base-T / 100Base-TX Fast Ethernet Switch MODE Link COL Mode Link 100 Mode ACT FAULT MASTER FULL PWR WAN IEEE 802.
AT-S39 User’s Guide The port assignments for the VLANs are as follows: Sales VLAN (VID 2) Engineering VLAN (VID 3) Production VLAN (VID 4) Untagged Ports Tagged Ports Untagged Ports Tagged Ports Untagged Ports Tagged Ports AT-8024 Switch (top) 1 to 5, 18 (PVID 2) 8, 16 9 to 11, 20 (PVID 3) 8, 16 21 to 24 (PVID 4) 8 AT-8024 Switch (bottom) 1 to 5 (PVID 2) 15 19 to 24 (PVID 3) 15 none none This example is nearly identical to the Port-based Example 2 on page 118.
Section II: Local and Telnet Management Basic VLAN Mode Overview The Fast Ethernet Switches support a special VLAN configuration referred to as Basic VLAN Mode. When the Basic VLAN Mode is activated, frames are forwarded based solely on MAC addresses. All VLAN information, including PVIDs assigned to ports and VLAN tags in tagged frames, is ignored. Tagged frames are analyzed only for priority level. Packets are passed through the switch unchanged.
AT-S39 User’s Guide Creating a Port-based or Tagged VLAN To create a new port-based or tagged VLAN, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. The VLAN Menu in Figure 36 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager VLAN Menu 1 - Virtual LAN Support 2 - Virtual LAN Definitions 3 - Configure Port VLANs & Priorities R - Return to Previous Menu Enter your selection? Figure 36 VLAN Menu 2.
Section II: Local and Telnet Management The Create a VLAN window in Figure 38 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Create a VLAN 1 2 3 4 5 - VLAN Name ............ VLAN ID (VID) ........ 2 Tagged Ports ......... Untagged Ports ....... Mirroring Port ....... None C - Create VLAN R - Return to Previous Menu Enter your selection? Figure 38 Create a VLAN Window 4. Type 1 to select VLAN Name and enter a name for the new VLAN.
AT-S39 User’s Guide 6. If the VLAN will contain tagged ports, type 3 to select Tagged Ports and specify the ports. If this VLAN will not contain any tagged ports, leave this field empty. 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). 7. Type 4 to select Untagged Ports and specify the ports on the switch to function as untagged ports in the VLAN. If this VLAN will not contain any untagged ports, leave this field empty.
Section II: Local and Telnet Management Note When you create a new VLAN, ports designated as untagged ports of the new VLAN are automatically removed from their current untagged VLAN assignment. For example, if you are creating a new VLAN on a switch that contains only the Default_VLAN, the ports that you specify as untagged ports of the new VLAN are automatically removed from the Default_VLAN.
AT-S39 User’s Guide Example of Creating a Port-based VLAN The following procedure creates the Sales VLAN illustrated in Portbased Example 1 on page 117. This VLAN will be assigned a VID of 2 and will consist of four untagged ports, Ports 1 to 4. The VLAN will not contain any tagged ports. The VLAN traffic will not be mirrored on another port, nor will it be sent to the switch’s CPU. To create the example Sales VLAN, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2.
Section II: Local and Telnet Management Example of Creating a Tagged VLAN The following procedure creates the Engineering VLAN in the top switch illustrated in Tagged VLAN Example on page 123. This VLAN will be assigned a VID of 3. It will consist of four untagged ports, Ports 9, 10, 11, and 20, and two untagged ports, Ports 8 and 16. The VLAN traffic will not be mirrored on another port, nor will it be sent to the switch’s CPU. To create the example Engineering VLAN, perform the following procedure: 1.
AT-S39 User’s Guide Modifying a VLAN Note You need to know the VID of the VLAN you want to modify in order to perform this procedure. To view the VLAN VIDs, refer to the procedure Displaying VLAN Information on page 135. To modify a VLAN, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 2 to select Virtual LAN Definitions. 3. From the Virtual LAN Definitions menu, type 2 to select Modify a VLAN.
Section II: Local and Telnet Management 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 (!). When changing a VLAN’s name, observe the following guidelines: ❑ A VLAN’s new name cannot be the same as the name of another VLAN on the same switch. For example, if the switch already contains a VLAN called Sales, you cannot change an existing VLAN’s name to Sales.
AT-S39 User’s Guide ❑ If the VLAN will not contain any untagged ports, leave this field empty. ❑ If you want to remove all untagged ports from the VLAN, enter a 0 (zero) for this value. ❑ You cannot remove untagged ports directly from the Default VLAN. Instead, you remove an untagged port from the Default VLAN by assigning the port as an untagged port to another VLAN. An untagged port removed from a VLAN is automatically returned to the Default VLAN as an untagged port.
Section II: Local and Telnet Management Displaying VLAN Information To view the name, VID number, and member ports of all the VLANs on a switch, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 2 to select Virtual LAN Definitions. 3. From the Virtual LAN Definitions menu, type 4 to select Show All VLANs. The Show All VLANs window is displayed. An example of the window is shown in Figure 40.
AT-S39 User’s Guide Deleting a VLAN Note You need to know the VID of the VLAN you want to delete to perform this procedure. To obtain a VLAN’s VID, refer to the procedure Displaying VLAN Information on page 135. To delete a VLAN, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 2 to select Virtual LAN Definitions. 3. From the Virtual LAN Definitions menu, type 3 to select Delete a VLAN. The Delete a VLAN menu in Figure 41 is displayed.
Section II: Local and Telnet Management 6. Type D to delete the VLAN or R to cancel the procedure. The following confirmation prompt is displayed: Are you sure you want to delete this VLAN [Yes/No] -> 7. Type Y to delete the VLAN or N to cancel the procedure. Press Return. A following prompt is displayed: This operation deletes ALL user created VLANs! Do you want to continue [Yes/No] -> 8. Press any key. 9. Type S to select Save Configuration Changes. The VLAN has been deleted.
AT-S39 User’s Guide Deleting All VLANs This section contains the procedure for deleting all VLANs, except the Default VLAN, on a switch. To delete selected VLANs, perform the procedure Deleting a VLAN on page 136. To delete all VLANs on a switch, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 2 to select Virtual LAN Definitions. 3. From the Virtual LAN Definitions menu, type 5 to select Clear All VLANs. A confirmation message is displayed. 4.
Section II: Local and Telnet Management Changing a PVID Value The procedure in this section explains how to change a PVID value for a port. As explained in Port-based VLAN Overview on page 113, a port receives a PVID when it is assigned as an untagged port to a VLAN. A port’s PVID will be the same as the VLAN’s VID to which it has been assigned. For example, if you assign Port 4 on the switch as an untagged port to a VLAN with a VID of 7, then the port will be assigned a PVID also of 7.
AT-S39 User’s Guide The Configure Port VLANS & Priorities window in Figure 43 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager Configure Port VLANs & Priorities 1 2 3 4 - Port Number ................... Port VLAN ID .................. Priority (0-7) 0=Low 7=High ... Override Priority (Y/N) ....... 1 1 0 N C - Configure Port VLANs and Priorities S - Save Configuration Changes R - Return to Previous Menu Enter your selection? Figure 43 Port VLANs and Priorities Window 5.
Section II: Local and Telnet Management Displaying PVIDs and Port Priorities The following procedure displays a window that lists the PVIDs for all the ports on the switch. The window also contains the current priority queue settings for each port. To display the PVID settings on the switch, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 3 to select Configure Port VLANS & Priorities.
AT-S39 User’s Guide Setting a Switch’s VLAN Mode This section contains the procedure for setting a switch’s VLAN mode. You can configure a switch to support port-based and tagged VLANs or to operate in the Basic VLAN mode. Port-based and tagged VLANs and the Basic VLAN mode are all described in earlier sections in this chapter. To configure a switch’s VLAN mode, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2. Type 2 to select Switch Mode.
Section II: Local and Telnet Management Enabling or Disabling All VLANs This procedure performs exactly the same function as the previous procedure. It sets a switch’s VLAN mode. When VLANs are enabled, the switch supports port-based and tagged VLANs. When VLANs are disabled, the switch supports the Basic VLAN mode. The only difference between the two procedures has to do with ingress filtering. If you activate the Basic VLAN Mode using the previous procedure, ingress filtering is disabled.
AT-S39 User’s Guide 3. Type 1 to select Enable/Disable VLANs. The VLAN Support window in Figure 46 is displayed. Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager VLAN Support ** VLANs are globally Enabled ** E - Enable VLANs Globally D - Disable VLANs Globally S - Save Configuration Changes R - Previous Menu Enter your selection? Figure 46 VLAN Support Window The prompt enclosed in asterisks gives the current status of the VLANs. 4.
Section II: Local and Telnet Management Enabling or Disabling Ingress Filtering There are certain rules a switch follows as it receives and forwards an Ethernet frame. There are rules for frames as they enter a port (called ingress rules) and rules for when a frame is transmitted out a port (called egress rules). A switch will not accept and forward a frame unless the frame passes the ingress and egress rules. There are quite a few ingress and egress rules for Fast Ethernet switches.
AT-S39 User’s Guide There is one other thing that should be mentioned about ingress filtering and tagged packets, and that is the priority tag. Each tagged frame has a priority tag in it that instructs the switch as to the importance of the frame. Frames with a high priority are handled ahead of frames with a low priority. Activating or deactivating ingress filtering has no effect on the switch’s handling of priority tags.
Section II: Local and Telnet Management Specifying a Management VLAN In order for you to remotely manage an AT-8300 Series Switch, there must exist a communications path through which the management station and the switch to be manage can communicate. If the management station is connected directly to a port on the switch, either through a tagged or untagged port, then the communications path automatically exists and you can fully manage the switch.
AT-S39 User’s Guide Now let’s assume that you have decided to create a VLAN called NMS with a VID of 24 for the sole purpose of remote network management. For this, you would need to create the NMS VLAN on each AT-8000 Series switch that you want to manage remotely, being sure to assign each NMS VLAN the VID of 24. Then you would need to be sure that the uplink and downlink ports connecting the switches together are either tagged or untagged members of the NMS VLAN.
Chapter 11 MAC Address Table The chapter contains the procedures for viewing the static and dynamic MAC address table.
AT-S39 User’s Guide MAC Address Overview Every hardware device that you connect to your network has a unique MAC address associated with it. A MAC address is assigned to a device by the device’s manufacturer. For example, every network interface card that you use to connect your computers to your network has a MAC address assigned to it by the adapter’s manufacturer. The AT-8000 Series switch contains a 4 kilobyte MAC address table.
Section II: Local and Telnet Management 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. Dynamic MAC addresses are not stored indefinitely in the MAC address table. The switch deletes a dynamic MAC address from the table if it does not receive any frames from the node over a specified period of time.
AT-S39 User’s Guide Displaying MAC Addresses The management software has two menu selections for displaying the MAC addresses of a switch. One selection displays the static, dynamic, and multicast MAC addresses while the other displays just the static and multicast addresses, but no dynamic addresses. To display the MAC address table, perform the following procedure: 1. From the Main Menu, type 6 to select MAC Address Tables. The MAC Address Table menu in Figure 48 is displayed.
Section II: Local and Telnet Management The management software displays the MAC addresses. Figure 49 is an example of the Show All MAC Addresses window, which displays both static and dynamic MAC addresses. The static MAC address window is exactly the same, except for the title and the fact that it displays only static MAC addresses.
AT-S39 User’s Guide The port numbering scheme is from right to left. As an example, assume that ports 1 through 4 on the switch were members of the same multicast group. This would be represented in the column as follows: “0000000F”. Another example is “000020F. This example would indicate that ports 1 to 4 and port 10 on the switch were members of the same multicast group. CPU This feature is not supported. MIR Indicates whether the traffic on the port is being mirrored.
Section II: Local and Telnet Management 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 6 to select MAC Address Table. 2. From the MAC Address Tables menu, type 6 to select View MAC Addresses by Port Menu.
AT-S39 User’s Guide Identifying a Port Number by MAC Address In some situations, you might want to know which port a particular MAC address was learned. You could display the MAC address table and scroll through the list looking for the MAC address. But if the switch is part of a large network, finding the address could prove difficult. The procedure in this section offers an easier way.
Section II: Local and Telnet Management 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-S39 User’s Guide Deleting All Dynamic MAC Addresses The management software allows you to purge the MAC address table of all dynamic MAC addresses. Once the table has been purged, the switch immediately begins to relearn the MAC addresses as frames are received on the ports. Note This procedure does not delete static MAC addresses. To delete all dynamic MAC addresses from the MAC address table, perform the following procedure. 1. From the Main Menu, type 6 to select MAC Address Tables. 2.
Section II: Local and Telnet Management Adding Static and Multicast MAC Addresses This section contains the procedure for adding static and multicast addresses to the switch. You can assign up to 255 static MAC addresses per port on an AT-8000 Series switch. To add a static or multicast address to the MAC address table, perform the following procedure: 1. From the Main Menu, type 6 to select MAC Address Tables. 2. From the MAC Address Tables menu, type 2 to select Add Static MAC Address.
AT-S39 User’s Guide Deleting MAC Addresses The following procedure explains how to delete a static, dynamic, or multicast MAC address from the MAC address table. To delete an address from the MAC address table, perform the following procedure: 1. From the Main Menu, type 6 to select MAC Address Tables. 2. From the MAC Address Tables menu, type 3 to select Delete MAC Address. The following prompt is displayed: Please enter a MAC address -> 3.
Section II: Local and Telnet Management 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 sent to or 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.
Chapter 12 Class of Service This chapter contains the procedures for configuring the Class of Service (CoS) feature of the AT-S39 software.
Section II: Local and Telnet Management Class of Service Overview The AT-8000 Series switch supports CoS as specified in the IEEE 802.1p and 802.1Q standards. CoS 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 CoS, network traffic was handled in a best-effort manner. File transfer delays did occur, but were mostly transparent to network users.
AT-S39 User’s Guide Configuring CoS To configure CoS for a port, perform the following procedure: 1. From the Main Menu, type 2 to select VLAN Menu. 2. From the VLAN Menu, type 3 to select Configure Port VLANS & Priorities. 3. Type 1 to select Configure Port VLANs & Priorities. The following prompt is displayed: Enter port number -> [1 to 24] -> 4. Enter the number of the port on the switch where you want to configure CoS. Press Return.
Chapter 13 IGMP Snooping This chapter explains how to activate and configure the Internet Group Management Protocol (IGMP) snooping feature on the switch.
AT-S39 User’s Guide IGMP Snooping Overview IGMP snooping is best explained by first defining IGMP. This protocol enables routers to create lists of nodes that are members of multicast groups. (A multicast group is a group 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.
Section II: Local and Telnet Management Without IGMP snooping, a switch would have to flood multicast packets out all of its ports, except the port on which it received the packet. Such flooding of packets can negatively impact switch and network performance. The AT-8000 Series switch supports both IGMP Version 1 and Version 2.
AT-S39 User’s Guide Activating IGMP Snooping To activate or deactivate IGMP snooping on the switch and to configure IGMP snooping parameters, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2. From the System Configuration Menu, type A to select Advanced Configuration. 3. From the Advanced Configuration window, type 1 to select IGMP Snooping Configuration. The IGMP Snooping Configuration window in Figure 50 is displayed.
Section II: Local and Telnet Management out a switch port when a host node signals its desire to leave a multicast group by sending a leave request or when the host node stops sending reports. The switch responds by immediately ceasing the transmission of further multicast packets out the port where the host node is connected.
AT-S39 User’s Guide 5 - Multicast Router Port(s) Specifies the port on the switch to which the multicast router is detected. You can let the switch determine this automatically by selecting Auto Detect, or you can specify the port yourself by entering a port number. To select Auto Detect, enter “0” (zero) for this parameter. You can specify more than one port. Note Selections 6 and 7 in the menu are discussed later in this chapter. 4.
Section II: Local and Telnet Management Displaying a List of Host Nodes You can use the AT-S39 software to display a list of the multicast groups on a switch, as well as the host nodes. To display the list, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2. From the System Configuration Menu, type A to select Advanced Configuration. 3. From the Advanced Configuration window, type 1 to select IGMP Snooping Configuration.
AT-S39 User’s Guide Displaying a List of Multicast Routers A multicast router is a router that is receiving multicast packets from a multicast application and transmitting the packets to host nodes. You can use the AT-S39 software to display a list of the multicast routers that are connected to the switch. To display a list of the multicast routers, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2.
Chapter 14 Broadcast Frame Control This chapter contains the procedures for configuring the broadcast frame control feature of the AT-S39 management software.
AT-S39 User’s Guide Broadcast Frame Control Overview Most frames on an Ethernet network are unicast frames. A unicast frame is a frame that 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.
Section II: Local and Telnet Management It is important to note that the maximum number applies to the egress port of a broadcast frame, not the ingress port. That is, any port on the switch will accept any number of broadcast frames. But a port will transmit out (forward) a broadcast frame only if it has not exceeded the maximum number of broadcast frames it can transmit. Here’s an example.
AT-S39 User’s Guide Configuring the Interval Timer To set the interval timer for the broadcast frame control feature, perform the following procedure: 1. From the Main Menu, type 5 to select System Config Menu. 2. From the System Configuration Menu, type A to select Advanced Configuration. 3. From the Advanced Configuration Menu, type 2 to select Broadcast Timers Setup. The Broadcast Storm Control window in Figure 53 is displayed.
Section II: Local and Telnet Management 5. Once you have set the desired timer intervals, type S to select Save Configuration Changes. Your changes are immediately activated on the switch. 6. Go to the next procedure and specify the maximum number of broadcast frames the ports on the switch can receive.
AT-S39 User’s Guide Configuring the Maximum Broadcast Frame Count To specify the maximum number of broadcast frames a port on the switch can receive and forward, perform the following procedure: 1. From the Main Menu, type 1 to select Port Menu. 2. From the Port Menu, type 1 to select Port Configuration. The following prompt is displayed: Starting Port to Configure [1 to 24] -> 3. Enter the number of the port you want to configure and press Return.
Chapter 15 TACACS+ and RADIUS Protocols This chapter contains the procedure for configuring the two authentication protocols TACACS+ and RADIUS.
AT-S39 User’s Guide TACACS+ and RADIUS Overview The AT-S39 software has two standard management login accounts: Manager and Operator. The Manager account lets you change a switch’s parameter settings while the Operator account only lets you view the settings. Each account has its own password. The Manager account has a default password of “admin” and the Operator account has a default password “friend.
Section II: Local and Telnet Management If the username and password combination is invalid, the authentication protocol server notifies the switch and the switch cancels the login. Authorization defines what a manager can do once logged in to a switch. You assign an authorization level to each username and password combination that you create on the server software. The access level will be either Manager or Operator.
AT-S39 User’s Guide Note This manual does not explain how to configure TACACS+ or RADIUS server software. For that you need to refer to the documentation that came with the software. By default, authentication protocol is disabled on an AT-8000 Series switch. Once you activate it, you will need to provide the following information: ❑ Which authentication protocol you want to use. Only one authentication protocol can be active on a switch at a time. ❑ IP addresses of up to three authentication servers.
Section II: Local and Telnet Management Configuring an Authorization Protocol To enable or disable the server-based authentication feature on the switch and to configure the TACACS+ and RADIUS settings, perform the following procedure: 1. From the Main Menu, type 4 to select Administration Menu. 2. From the Administration Menu, type A to select Server-based Authentication. The Authentication Menu in Figure 54 is displayed.
AT-S39 User’s Guide Once you have activated the authentication feature on the switch and designated which authentication protocol you intend to use, you are ready to configure the selected protocol. If you selected TACACS+, go to Step 7. If you selected RADIUS, go to Step 8. 7. To configure TACACS+, do the following: a. Type 3 to select TACACS+ Configuration.
Section II: Local and Telnet Management Enter per-server secret [max 40 characters] -> Use this prompt to enter the encryption secret for the TACACS+ server whose IP address you are specifying. 4 - TAC Server Order You use this selection to indicate the order in which you want the switch to query the TACACS+ servers for logon authentication. Of course, you can skip this option if you specified only one IP address. The default is 1, 2, and 3, in that order.
AT-S39 User’s Guide The following window is displayed: Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager RADIUS Client Configuration 1 2 3 4 5 6 - Global Encryption Key ............. Global Server Timeout period....... RADIUS Server 1 Configuration ..... RADIUS Server 2 Configuration ..... RADIUS Server 3 Configuration ..... Show Status 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.
Section II: Local and Telnet Management 3 - RADIUS Server 1 Configuration 4 - RADIUS Server 1 Configuration 5 - RADIUS Server 1 Configuration Use these parameters to specify the IP addresses of up to three network servers containing the RADIUS server software. Selecting one of the options displays the following window: Allied Telesyn Ethernet Switch AT-8024 Login Session: Manager RADIUS Server 1 Configuration 1 - Server IP Address ................. 0.0.0.0 2 - Server Authentication UDP Port ....
Chapter 16 Ethernet Statistics This chapter contains the procedures for displaying data traffic statistics.
Section II: Local and Telnet Management Displaying Port Statistics To display Ethernet port statistics, perform the following procedure: 1. From the Main Menu, type 7 to select Ethernet Statistics. The Ethernet Statistics menu in Figure 58 is displayed. Allied Telesyn AT-8024 Ethernet Switch Login Sesion: Manager Ethernet Statistics 1 - Display Port Statistics 2 - Display Module Statistics 3 - Clear Statistics R - Return to Previous Menu Enter your selection? Figure 58 Ethernet Statistics Menu 2.
AT-S39 User’s Guide CRC Error (CRC_ERROR) Number of packets with a cyclic redundancy check (CRC) error but with the proper length (64-1518 bytes) received on the port. Undersize Packets (UNDERSIZE) 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 (OVERSIZE) Number of packets exceeding the maximum specified by IEEE 802.3 (1518 bytes including the CRC) received on the port.
Section II: Local and Telnet Management Displaying Switch Statistics To display Ethernet statistics for an entire switch, perform the following procedure: 1. From the Main Menu, type 7 to select Ethernet Statistics. 2. From the Ethernet Statistics menu, type 2 to select Display Module Statistics. The statistics for the port are displayed in the Display Module Statistics window, shown in Figure 59.
AT-S39 User’s Guide Received Overflow Number of times the capacity of the port buffers have been exceeded. Received Broadcast Number of broadcast packets received on the switch. Received Multicast Number of multicast packets received on the switch. CRC Error Number of packets with a cyclic redundancy check (CRC) error but with the proper length (64-1518 bytes) received by the switch. Undersize Packets Number of packets that were less than the minimum length specified by IEEE 802.
Chapter 17 File Downloads and Uploads There are three files that coexist on an AT-8000 Series switch while the device is operating. They are: ❑ AT-S39 management software This is the operating software for the switch. ❑ AT-S39 bootloader This image contains the code that initially controls the switch whenever you power on or reset the unit. ❑ Switch configuration file This file contains the settings for the different switch parameters. such as VLANs, STP settings, and so forth.
AT-S39 User’s Guide the same. What you can do is configure one of the AT-8000 Series switches in your network, and then download its configuration file to the other switches. This can save you the trouble of having to configure each switch individually. There are a several different ways for downloading and uploading files onto a switch. They are: ❑ Local management session One method for downloading or uploading files is from a local management session on the switch using either Xmodem or TFTP.
Section II: Local and Telnet Management Obtaining Software Updates New releases of the AT-S39 management software are available from the Allied Telesyn web site at www.alliedtelesyn.com and 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 these switches will have “S39” as part of the filename. Note All switch models in the AT-8000 Series use the same management software image.
AT-S39 User’s Guide Transferring Files from a Local Management Session This section contains the procedure for downloading or uploading the following files onto a switch from a local management session. ❑ New AT-S39 software image and bootloader software ❑ Configuration file You can transfer a file using Xmodem or TFTP. In order to use TFTP, there must be a node on your network with the TFTP server software and the file to download must be stored on the same node.
Section II: Local and Telnet Management The following menu is displayed: Allied Telesyn Ethernet Switch AT-8024 Login Session: Manger Downloads & Uploads 1 - Download Application Image/Bootloader 2 - Download Configuration Data 3 - Upload Application Image 4 - Upload Configuration Data R - Return to Previous Menu Enter your selection? Figure 60 Downloads & Uploads Menu Note Options 3 and 4 in the menu are described in Uploading Files on page 203. 4.
AT-S39 User’s Guide Once the filename has been specified, the download begins. Downloading a configuration file takes only a few moments. Downloading an AT-S39 image file can take several minutes. If you are installing a new management image, the switch begins to initialize the software after it is installed, a process that takes approximately one minute to complete. Once the management software is initialized, the switch automatically resets. Note Do not interrupt the initialization process.
Section II: Local and Telnet Management The Send File window in Figure 62 is displayed. Figure 62 Send File Window 10. Click the Browse button and specify the location and file to be downloaded onto the switch. 11. Click on the Protocol field and select as the transfer protocol either Xmodem or, for a faster download, 1K XModem. 12. Click Send. The software immediately begins to download onto the switch. The Xmodem File Send window in Figure 63 displays current status of the software download.
AT-S39 User’s Guide If you are installing a new management image, the switch begins to initialize the software after it is installed, a process that takes approximately one minute to complete. Once the management software is initialized, the switch automatically resets. Note Do not interrupt the initialization process. Do not reboot the switch.
Section II: Local and Telnet Management Downloading Files Switch to Switch The previous procedure explained how to download an AT-S39 software image or configuration file onto a switch from a local management session. This procedure explains how to download an AT-S39 software image or configuration file from one AT-8000 Series switch to another switch. This procedure is useful in networks that contain a large number of AT8000 Series switches.
AT-S39 User’s Guide The following prompt is displayed: Enter the starting remote switch number -> [1 to 12] 4. Enter the number of the switch whose software or configuration file you want to update. To update a range of switches, enter the number of the first switch. The following prompt is displayed: Enter the ending remote switch number -> [1 to 12] 5. Enter the last switch in the range you want to update. To update just one switch, enter the same number here as you entered in the previous step.
Section II: Local and Telnet Management Uploading Files To upload a management software image or configuration from a switch onto your management station, perform the following procedure: Note It is not recommended that you upload an AT-S39 software image onto a management workstation for download onto another switch. New AT-S39 software images for downloading onto a switch should only be obtained from the Allied Telesyn web site. 1.
AT-S39 User’s Guide 6. To upload a file using Xmodem, type X at the prompt displayed in Step 4. The following prompt is displayed: You are going to invoke the Xmodem download utility. Do you wish to continue? [Yes/No] 7. Type Y for Yes. The prompt “Uploading” is displayed. 8. Begin the file transfer of the new management software image. Note The transfer protocol must be Xmodem or 1K Xmodem.
Section II: Local and Telnet Management Downloading and Uploading Files using TFTP from a Management Workstation You can upload and download files onto an AT-8000 Series switch from a management workstation on your network using TFTP. Downloading Files The AT-S39 software comes with TFTP server software.
AT-S39 User’s Guide Example The following example downloads a new management software image onto a switch with an IP address of 149.35.1.1. tftp -i 149.35.1.1 put c:\ats39.img ats39.img Uploading a Configuration File The switch configuration information can be uploaded and saved to a file on a workstation. This file can then be used to restore the configuration information to the same switch or can be uploaded to other switches of the same family that need to be configured identically.
Section III Web Browser Management The chapters in this section explain how to manage an AT-8024 or AT-8024GB Fast Ethernet switch using a web browser.
Chapter 18 Starting a Web Browser Management Session This chapter contains the procedure for starting a management session on an AT-8000 Series switch using a web browser, such as Microsoft Internet Explorer or Netscape Navigator.
Starting a Web Browser Management Session This section explains how to start a web browser management session. There must be at least one AT-8000 Series switch on your network that has been assigned an IP address. The switch with the IP address is referred to as the master switch. Once you have started a Telnet management session on the master switch, you will have management access to all other AT-8000 Series switches that reside in the same subnet.
AT-S39 User’s Guide The user names cannot be changed. To change a password, refer to Configuring an IP Address and Switch Name on page 37. The window shown in Figure 65 is displayed. Figure 65 Home Page This is the Home page of the management software. In the left portion of the Home page is the main menu: ❑ Enhanced Stacking ❑ Configuration ❑ Monitoring ❑ CLI (Command Line Interface) ❑ Exit Note The Enhanced Stacking selection is available only if the switch is the master switch of an enhanced stack.
Note A web browser management session remains active even if you link to other sites. You can return to the management web pages anytime as long as you do not quit the browser. Browser Tools You can use the browser tools to move around the Omega menus. Selecting Back on your browser’s toolbar returns you to the previous display. You can also use the browser’s bookmark feature on frequently-used Omega menus and windows.
Chapter 19 Basic Switch Parameters This chapter contains the following sections: ❑ Configuring an IP Address and Switch Name on page 213 ❑ Activating the BOOTP and DHCP Services on page 217 ❑ Viewing System Information on page 218 ❑ Configuring the SNMP Parameters and Trap IP Addresses on page 220 ❑ Resetting a Switch on page 222 ❑ Pinging a Remote System on page 223 ❑ Returning the AT-S39 Software to the Factory Default Values on page 224 212
Section III: Web Browser Management Configuring an IP Address and Switch Name Note For guidelines on when to assign an IP address, subnet address, and gateway address to an AT-8024 or AT-8024GB switch, refer to When Does a Switch Need an IP Address? on page 35. To set the basic switch parameters for an AT-8024 or AT-8024GB Fast Ethernet switch, perform the following procedure: 1. From the Home Page, select Configuration. The Configuration window is displayed with the System menu option selected by default.
AT-S39 User’s Guide The General tab in Figure 66 is displayed. Figure 66 General Tab Window - Configuration Note This procedure describes the parameters in the Administration section of the window. The parameters in the Configuration and Broadcast Storm Control sections are discussed later in this guide. Note The Reset button at the bottom of the window is used to reset the switch.
Section III: Web Browser Management 3. Change the parameters as desired. The parameters are described below: System Name This parameter specifies a name for the switch (for example, Sales Ethernet switch). Entering a value for this parameter is optional. Note You should assign each switch a name. The names can help you identify the various switches in your network. This can help you avoid performing a configuration procedure on the wrong switch.
AT-S39 User’s Guide Caution You should not use spaces or special characters, such as asterisks (*) and exclamation points (!), in a password if you will be managing the switch from a web browser. Many web browsers cannot handle special characters in passwords. 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.
Section III: Web Browser Management Activating the BOOTP and DHCP Services For background information on BOOTP and DHCP, refer to the section Activating the BOOTP and DHCP Services on page 40. To activate or deactivate the BOOTP and DHCP protocols on the switch from a web browser management session, perform the following procedure: 1. From the Home Page, select Configuration. The Configuration window is displayed with the System menu option selected by default. 2.
AT-S39 User’s Guide Viewing System Information To view basic information about the switch, perform the following procedure: 1. From the Home page, select Monitoring. 2. From the Monitoring menu, select System. 3. Select the General tab. The General tab window in Figure 67 is displayed.
Section III: Web Browser Management This window is for viewing purposes only. You cannot change any of the values from this window. The sections in the window are defined below. General This section displays the switch’s serial number and the switch’s MAC address. These values cannot be changed. Administration This section contains a variety of information, including the IP address of the switch and the system name.
AT-S39 User’s Guide Configuring the SNMP Parameters and Trap IP Addresses To change the switch’s SNMP community strings or to specify the IP addresses of management stations to receive traps from the switch, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration menu, select System. 3. Select the SNMP tab. The SNMP window in Figure 68 is displayed. Figure 68 SNMP Tab 4. Adjust the parameters as desired. The parameters are described below.
Section III: Web Browser Management Trap Receiver 1 Trap Receiver 2 Trap Receiver 3 Trap Receiver 4 Use these selections to specify the IP addresses of up to four management workstations on your network to receive traps from the switch. Note The Enable SNMP Access check box in the window controls whether the switch can be remotely managed using an SNMP application program. If the check box is empty, the switch cannot be managed through SNMP. This is the default. 5.
AT-S39 User’s Guide Resetting a Switch To reset a switch, perform the following procedure: 1. From the Home Page, select Configuration. The Configuration window is displayed with the System option selected by default. 2. If the System menu option is not selected, select it and then select the General tab. 3. Click the Reset button at the bottom of the window. A confirmation prompt is displayed. 4. Click OK to reset the switch or Cancel to cancel the procedure.
Section III: Web Browser Management Pinging a Remote System You can instruct the switch to ping a node on your network. This procedure is useful in determining whether a valid link exists between the switch and another device. To ping a network device, perform the following procedure: 1. From the Home Page, select Monitoring. 2. From the Monitoring window, select the System menu option. 3. Select the Ping Client tab. The window in Figure 69 is displayed. Figure 69 Ping Client Window 4.
AT-S39 User’s Guide Returning the AT-S39 Software to the Factory Default Values The procedure in this section returns all AT-S39 software parameters, except the IP address, subnet mask, and gateway address, to their default values. This procedure also deletes any VLANs that you have created on the switch. Note The AT-S39 software default values can be found in Appendix A, AT-S39 Default Settings on page 293.
Chapter 20 Enhanced Stacking This chapter contains the following procedures: ❑ Setting a Switch’s Enhanced Stacking Status on page 226 ❑ Selecting a Switch in an Enhanced Stack on page 228 Note For background information on enhanced stacking, refer to Enhanced Stacking Overview on page 53.
AT-S39 User’s Guide Setting a Switch’s Enhanced Stacking Status The enhanced stacking status of the switch can be master, slave, or unavailable. Each status is described below: ❑ Master - A master switch of a stack can be used to manage all other AT-8000 Series switches in a subnet. Once you have established a local or remote management session with the master switch, you can access and manage all the switches in the subnet. A master switch must have a unique IP address.
Section III: Web Browser Management The Enhanced Stacking tab is shown in Figure 71. Figure 71 Enhanced Stacking Tab 4. Click the desired enhanced stacking status for the switch. 5. Click Apply. The new enhanced stacking status is immediately activated on the switch.
AT-S39 User’s Guide Selecting a Switch in an Enhanced Stack The first thing that you should do before you perform any procedure on a switch in an enhanced stack is check to be sure that you are performing it on the correct switch. If you assigned system names to your switches, then it is very easy. The name of the switch being managed is displayed at the top of every management window.
Section III: Web Browser Management Note The master switch on which you started the management session is not included in the list, nor are any switches with an enhanced stacking status of Unavailable. You can sort the switches in the list by switch name or MAC address by clicking on the column headers. By default, the list is sorted by MAC address. You can refresh the list by clicking Refresh. This instructs the master switch to again poll the subnet for all AT-8000 Series switches. 2.
Chapter 21 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.
Section III: Web Browser Management Configuring Port Parameters To configure the parameter settings for a port on a switch, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 1. 3. Select the Port Setting tab. The Port Setting tab is shown in Figure 73. Figure 73 Port Setting Configuration Tab 4. Click the port in the graphical switch image that you want to configure. The selected port turns white.
AT-S39 User’s Guide The Settings for Port window is displayed. An example of the window is shown in Figure 74. Figure 74 Settings for Port Window Note Clicking the Default button returns the port settings to the default values. Default values are listed in Appendix A, AT-S39 Default Settings on page 293. 6. Adjust the port parameters as desired. The parameters are described below. Disable Port You can use this check box to enable or disable a port. A disabled port will not accept or transmit frames.
Section III: Web Browser Management ❑ 100Mbps - Half Duplex ❑ 100Mbps - Full Duplex Broadcast Storm Control The maximum number of broadcast packets the port can receive within a specified period of time. If the threshold is reach, any additional broadcast packets received on the port are discarded by the switch. For background information on this feature, refer to Broadcast Frame Control Overview on page 174.
AT-S39 User’s Guide Displaying Port Status and Statistics The procedure in this section displays the operating status of the ports on a switch and port statistics. You can view a port’s operating speed, duplex mode, MDI/MDI-X configuration, and more. You can also view the operating status of any GBIC modules installed in an AT-8024GB. To display the status or statistics of a switch port, perform the following procedure: 1. From the Home page, select Monitoring. 2. From the Monitoring page, select Layer 1.
Section III: Web Browser Management If you select port status, the Port Status window in Figure 76 is displayed. Figure 76 Port Status Window The information in this window is for viewing purposes only. To adjust port parameters, refer to Configuring Port Parameters on page 231. The columns in the window are described below: Port The port number. Link The status of the link between the port and the end node connected to the port.
AT-S39 User’s Guide MDI The operating configuration of the port. Possible values are MDI and MDI-X. Speed The operating speed of the port. Possible values are: 0010 - 10 Mbps 0100 - 100 Mbps 1000 - 1000 Mbps Dplx The duplex mode of the port. Possible values are half-duplex and full-duplex. Flow Control The port’s flow control setting. Possible values are: None - No flow control on the port. Transmit - Flow control only on packets being transmitted out the port.
Section III: Web Browser Management Priority Level The priority queue to which untagged packets are directed when received on the port. A value of 1 to 3 directs untagged packets to the low priority queue while a value of 4 to 7 directs packets to the high priority queue. If the override priority feature has been activated on the port, tagged packets will be directed to the priority queue reflected by this status parameter.
AT-S39 User’s Guide Received Multicast Number of multicast packets received on the port. CRC Error Number of packets with a cyclic redundancy check (CRC) error but with the proper length (64-1518 bytes) received on the port Total Packets Number of packets received and transmitted 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.
Chapter 22 Port Security This chapter explains how to display the current port security level on the switch from a web browser management session. Note For background information on port security, refer to Port Security Overview on page 71. Note A switch’s port security level can be changed only from a local management session.
AT-S39 User’s Guide Displaying the Port Security Level To display the switch’s port security level, perform the following procedure: 1. From the Home page, select Monitoring. 2. From the Configuration page, select Layer 2. 3. From the Layer 2 page, select the Port Security tab. The current security level is displayed.
Chapter 23 Port Trunks This chapter contains the procedure for creating or deleting a port trunk from a web browser management session. Note For background information on port trunking, refer to Port Trunking Overview on page 78.
AT-S39 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.
Section III: Web Browser Management 4. To create a port trunk, do the following: a. Click the ports that will make up the port trunk. A selected port changes to white. An unselected port is black. A port trunk can contain 2, 3, or 4 ports. b. Click Apply. Once you have selected the ports of the trunk, the following appear under Trunk Method. c. Click the desired load distribution method. The default is SA/DA. d. Configure the ports on the remote switch for port trunking.
Chapter 24 Port Mirroring This chapter contains the procedure for creating or deleting a port mirror. Note For background information on port mirroring, refer to Port Mirroring Overview on page 88.
Section III: Web Browser Management Creating or Deleting a Port Mirror To create or delete a port mirror, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 1. 3. Select the Port Mirroring tab. The management software displays the Port Mirroring window in Figure 80. Figure 80 Port Mirroring Window 4. To create a port mirror, do the following: a.
AT-S39 User’s Guide 5. To disable port mirroring, select “None“ from the Mirroring Port pulldown menu and click Apply. The port mirror is deleted. The port that was functioning as the mirror port can now be used for normal network operations.
Chapter 25 STP and RSTP This chapter explains how to configure the STP and RSTP parameters on an AT-8000 Series switch from a web browser management session. Sections in the chapter include: ❑ Enabling or Disabling STP or RSTP on page 248 ❑ Configuring STP on page 249 ❑ Configuring RSTP on page 253 ❑ Displaying STP or RSTP Settings on page 257 Note For background information on spanning tree, refer to STP and RSTP Overview on page 92.
AT-S39 User’s Guide Enabling or Disabling STP or RSTP To enable or disable spanning tree on the bridge, do the following: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 2. 3. From the Layer 2 page, select the Spanning Tree tab. The Spanning Tree tab in Figure 81 is displayed. Figure 81 Spanning Tree Tab 4. To enable or disable spanning tree, click the Enable Spanning Tree check box.
Section III: Web Browser Management Configuring STP Caution 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. From the Spanning Tree tab window, click STP Configuration and click Configure. The Spanning Tree window in Figure 82 is displayed.
AT-S39 User’s Guide 2. Adjust the bridge STP settings as needed. The parameters are described below. Bridge Identifier The MAC address of the bridge. The bridge identifier is used as a tie breaker in the selection of the root bridge when two or more bridges have the same bridge priority value. This value cannot be changed. 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.
Section III: Web Browser Management Note The aging time for BPDUs is different from the aging time used by the MAC address table. 3. After you have made the desired changes, click Apply. 4. To adjust a port’s STP settings, click on the port in the switch image and click Modify. You can select more than one port at a time. The Port Spanning Tree Protocol window in Figure 83 is displayed. Figure 83 STP Port Configuration Window 5. Adjust the settings as desired. The parameters are described below.
AT-S39 User’s Guide Port Priority This parameter is used as a tie breaker when two or more ports are determined to have equal costs to the root bridge. The default value for priority is 128. The range is 0-255. Bridge Hello Time The time interval between generating and sending configuration messages by the bridge. The default is 2 seconds. This value cannot be changed from this window. To change this value, refer to earlier in this procedure.
Section III: Web Browser Management Configuring RSTP Caution The bridge provides default RSTP parameters that are adequate for most networks. Changing them without prior experience and an understanding of how RSTP works might have a negative effect on your network. You should consult the IEEE 802.1w standard before changing any of the RSTP parameters. 1. From the Spanning Tree tab window, click RSTP Configuration and click Configure. The RSTP Bridge Configuration window in Figure 82 is displayed.
AT-S39 User’s Guide 2. Adjust the parameters are desired. The parameters are defined below. Force Version This selection determines whether the bridge will operate with RSTP or in an STP-compatible mode. If you select RSPT, the bridge will operate all ports in RSTP, except for those ports that receive STP BPDU packets. If you select Force STP Compatible, the bridge will operate all ports in STP. The default is RSTP. Bridge Priority The priority number for the bridge.
Section III: Web Browser Management Bridge Identifier The MAC address of the bridge. The bridge identifier is used as a tie breaker in the selection of the root bridge when two or more bridges have the same bridge priority value. This value cannot be changed. Root Bridge The MAC address of the bridge functioning as the root bridge in the spanning tree domain. This value is for display purposes only and cannot be changed. Root Priority The priority number of the root bridge. 3.
AT-S39 User’s Guide Port 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 range is 0 to 20 000 000. The default setting is Autodetect, which sets port cost depending on the speed of the port. Default values are 100 for a 10 Mbps port, 10 for a 100 Mbps port, and 4 for a 1 Gbps port. MCHECK This option instructs the bridge to send out RSTP BPDU packets for several seconds from the selected port.
Section III: Web Browser Management Displaying STP or RSTP Settings To display STP or RSTP parameter settings, perform the following procedure: 1. From the Home page, select Monitoring. 2. From the Monitoring menu, select Layer 2. 3. From the Layer 2 page, select the Spanning Tree tab. The Spanning Tree window in Figure 87 is displayed. This window displays information on whether spanning tree is enable or disabled and which protocol version, STP or RSTP, is active.
AT-S39 User’s Guide The example in Figure 87 is for RSTP. The information in this window is for viewing purposes only. Figure 87 Rapid Spanning Tree Window - Monitoring 5. To view port settings, click a port in the switch and click Status or Settings.
Chapter 26 Virtual LANs This chapter explains how to create, modify, and delete VLANs from a web browser management session. This chapter also explains how to change a switch’s VLAN operating mode. Note For background information on VLANs and on the Basic VLAN mode, refer to Chapter 10, Virtual LANs.
AT-S39 User’s Guide Creating a VLAN To create a new VLAN, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration menu, select Layer 2. 3. From the Layer 2 window, select the VLAN tab. The VLAN window in Figure 88 is displayed.
Section III: Web Browser Management 4. Click Add. The Add VLAN window in Figure 89 is displayed. Figure 89 Add VLAN Window 5. Select the Name field and enter a name for the new VLAN. The name can be from one to 10 characters in length. The name should reflect the function of the nodes of the VLAN (for example, Sales or Accounting). The name can contain spaces but not special characters, such as asterisks (*) or exclamation points (!).
AT-S39 User’s Guide example, if you are creating a VLAN called Sales that will span three switches, you must assign the same VID value to each Sales VLAN on the three switches. Note A VLAN must have a VID. 7. If you want all received traffic on the ports of the VLAN to be mirrored to another port on the switch, select the mirroring port from the Mirroring Port pull-down menu. This feature is useful when troubleshooting a VLAN.
Section III: Web Browser Management Modifying a VLAN To modify a VLAN, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration menu, select Layer 2. 3. From the Layer 2 window, select the VLAN tab. The VLAN window in Figure 88 on page 260 is displayed. 4. Click the circle next to the name of the VLAN you want to modify. 5. Click Modify. The configuration window for the VLAN is displayed. 6.
AT-S39 User’s Guide Deleting VLANs To delete a VLAN from the switch, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration menu, select Layer 2. 3. From the Layer 2 window, select the VLAN tab. The VLAN window in Figure 88 on page 260 is displayed. 4. Click the circle next to the name of the VLAN you want to delete. 5. Click Remove. A confirmation prompt is displayed. 6. Click OK to delete the VLAN or Cancel to cancel the procedure.
Section III: Web Browser Management Displaying VLANs To display all the existing VLANs on a switch, perform the following procedure: 1. From the Home page, select Monitoring. 2. From the Monitoring page, select Layer 2. 3. From the Layer 2 page, select the VLAN tab. The management software displays the window in Figure 90. The information in this window is for viewing purposes only.
AT-S39 User’s Guide Setting the Switch’s VLAN Mode This section contains the procedure for setting a switch’s VLAN mode. You can configure a switch to support port-based and tagged VLANs or to operate in the Basic VLAN mode. Note Refer to Chapter 10, Virtual LANs, for descriptions of port-based and tagged VLANs and the Basic VLAN mode. To set the switch’s VLAN mode, perform the following procedure: 1. From the Home Page, select Configuration. 2. From the Configuration menu, choose System. 3.
Section III: Web Browser Management Enabling or Disabling VLANs This procedure performs exactly the same function as the previous procedure. It sets a switch’s VLAN mode. When VLANs are enabled, the switch supports port-based and tagged VLANs. When VLANs are disabled, the switch supports the Basic VLAN mode. The difference between the two procedures has to do with ingress filtering. If you activate the Basic VLAN Mode using the previous procedure, ingress filtering is disabled.
AT-S39 User’s Guide Changing a PVID The procedure in this section explains how to change a PVID value for a port. As explained in Port-based VLAN Overview on page 113, a port receives a PVID when it is assigned as an untagged port to a VLAN. A port’s PVID will be the same as the VLAN’s VID to which it has been assigned. For example, if you assign Port 4 on the switch as an untagged port to a VLAN with a VID of 7, the port is assigned a PVID also of 7.
Section III: Web Browser Management 6. Use the pull-down menu from the Port VLAN ID selection to specify the new PVID value for the port. The pull-down menu displays the VIDs of the VLANs existing on the switch. 7. Click Apply. The new value is immediately activated on the port. Note The Priority and Override Priority selections in the CoS Setting window are explained in Configuring CoS on page 278.
Chapter 27 MAC Address Table This chapter contains instructions on how to view the dynamic and static addresses in the MAC address table of the switch. This chapter contains the following procedure: ❑ Viewing the MAC Address Table on page 271 ❑ Adding Static and Multicast MAC Addresses on page 274 ❑ Deleting MAC Addresses on page 275 ❑ Changing the Aging Time on page 276 Note For background information on MAC addresses, refer to MAC Address Overview on page 150.
Section III: Web Browser Management Viewing the MAC Address Table To view the MAC address table, perform the following procedure: 1. From the Home page, select either Configuration or Monitoring. 2. Select Layer 2. 3. From the Layer 2 page, select the MAC Address tab. The MAC Address window is displayed. Figure 92 shows how this window appears when you display it through the Configuration main menu selection. If displayed through the Monitoring main menu selection, the Add button is not included.
AT-S39 User’s Guide View All Static Addresses This option displays only the static MAC addresses. Static MAC addresses are addresses that you entered manually into the MAC address table. View All IP Multicast Addresses This option displays the multicast MAC addresses. View By Port The pull-down menu with this option is used to display the MAC addresses learned on a particular port. View By VLAN ID This option displays the MAC addresses learned by a particular VLAN on the switch.
Section III: Web Browser Management MIR Indicates whether the traffic on the port is being mirrored. Yes means the traffic is being mirrored while No indicates that it is not. EMP Indicates whether multicast packets are being forwarded by ports in the blocking state. This feature is not supported at this time. This column will indicate “No” for all multicast addresses, except for the switch’s MAC address. Multicast packets are forwarded only by ports in the forwarding state.
AT-S39 User’s Guide Adding Static and Multicast MAC Addresses This section contains the procedure for assigning static or multicast address to ports on the switch. You can assign up to 255 static MAC addresses per port. To add a static or multicast address to the MAC address table, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 2. 3. From the Layer 2 page, select the MAC Address tab.
Section III: Web Browser Management Deleting MAC Addresses To delete a static, dynamic, or multicast MAC address from the switch, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 2. 3. From the Layer 2 page, select the MAC Address tab. The MAC Address window in Figure 92 on page 271 is displayed. 4. Display the MAC addresses on the switch by selecting one of the options.
AT-S39 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 sent to or 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 28 Class of Service This chapter contains instructions on how to configure CoS. This chapter contains the following procedure: ❑ Configuring CoS on page 278 Note For background information on CoS, refer to Class of Service Overview on page 163.
AT-S39 User’s Guide Configuring CoS To configure CoS, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 2. 3. From the Layer 2 page, select the CoS tab. A graphical image of the switch is displayed. 4. Click the port where you want to configure CoS. You can select only one port at a time. A selected port turns white. (To deselect a port, click it again.) 5. Click Modify. The CoS Settings window in page 268 is displayed. 6.
Chapter 29 IGMP Snooping This chapter describes how to configure the IGMP snooping feature on the switch. Note For background information on this feature, refer to IGMP Snooping Overview on page 166.
AT-S39 User’s Guide Configuring IGMP Snooping To configure IGMP snooping from a web browser management session, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration menu, select System. 3. Select the IGMP tab. The IGMP tab in Figure 94 is displayed. Figure 94 IGMP Window - Configuration 4. Adjust the IGMP parameters as necessary. The parameters are explained below: Enable IGMP Snooping Status Enables and disables IGMP snooping on the switch.
Section III: Web Browser Management Snoop Topology Defines whether there is only one host node per switch port or multiple host nodes per port. Possible settings are Edge (SingleHost/Port) and Intermediate (Multi-Host/Port). The Edge (Single-Host/Port) setting is appropriate when there is only one host node connected to each port on the switch.
AT-S39 User’s Guide This parameter is useful with networks that contain a large number of multicast groups. You can use the parameter to prevent the switch’s MAC address table from filling up with multicast addresses, leaving no room for dynamic or static MAC addresses. The range is 1 address to 2048 addresses. The default is 256 multicast addresses. Multicast Router Port(s) Specifies the port on the switch to which the multicast router is detected.
Section III: Web Browser Management Displaying a List of Host Nodes and Multicast Routers You can use the AT-S39 software to display a list of the multicast groups on a switch, as well as the host nodes. You can also view the multicast routers. A multicast router is a router that is receiving multicast packets from a multicast application and transmitting the packets to host nodes. To view host nodes and multicast routers, perform the following procedure: 1. From the Home Page, select Monitoring. 2.
AT-S39 User’s Guide Viewing a list of host nodes displays a window containing the following information. The information in the window is for viewing purposes only. Multicast Group The multicast address of the group. Member Port The port(s) on the switch to which one or more host nodes of the multicast group are connected. VLAN ID The VID of the VLAN in which the port is an untagged member. Host IP The IP address(es) of the host node(s) connected to the port.
Chapter 30 Broadcast Frame Control This chapter contains instructions on how to configure the broadcast frame control feature on the switch. Note For background information on this feature, refer to Broadcast Frame Control Overview on page 174.
AT-S39 User’s Guide Configuring the Interval Timer The interval timer defines the time period used in counting the number of broadcast packets transmitted by a port. A port will not transmit more than its maximum number of broadcast frames during the specified timer interval. If a port reaches its maximum number, it will discard and not forward any additional broadcast frames. You can specify a different interval timer for 10 and 100 Mbps ports and 1000 Mbps ports.
Section III: Web Browser Management Setting the Maximum Number of Broadcast Frames To set the maximum number of broadcast frames you want the ports on the switch to transmit, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select Layer 1. When you open the Layer 1 page, the Port Settings tab is selected by default. If it is not selected, select it now. 3.
Chapter 31 TACACS+ and RADIUS Protocols This chapter contains instructions on how to configure the authentication protocols. This chapter contains the following procedure: ❑ Configuring TACACS+ and RADIUS on page 289 Note For background information on the authentication protocols, refer to TACACS+ and RADIUS Overview on page 180.
Section III: Web Browser Management Configuring TACACS+ and RADIUS To configure the authentication protocols, perform the following procedure: 1. From the Home page, select Configuration. 2. From the Configuration page, select System. 3. From the System page, select the Server-based Authentication tab. The tab is shown in Figure 96. Figure 96 Server-based Authentication Tab 4. To enable or disable the authentication feature on the switch, click the Disable Server-based Authentication check box.
AT-S39 User’s Guide Note If you activated the authentication feature, go to Step 6 to configure TACACS+ or Step 7 to configure RADIUS. 7. To configure TACACS+, do the following: a. From the Server-based Authentication tab, click the check circle next to TACACS+ Configuration and click Configure. The TACACS+ Configuration window in Figure 97 is displayed. Figure 97 TACACS+ Configuration Window b. Configure the parameters as needed. They are described below.
Section III: Web Browser Management IP Address and Encryption Secret Use these fields to specify the IP addresses and encryption secrets of up to three network servers containing TACACS+ server software. You can leave an encryption field blank if you entered the server’s secret in the Global Secret field. c. After you have finished configuring the parameters, click Apply. 8. To configure RADIUS, do the following: a.
AT-S39 User’s Guide expires and the server has not responded, the switch queries the next TACACS+ server in the list. If there aren’t any more servers, than the switch will default to the standard Manager and Operator accounts. The default is 30 seconds. The range is 1 to 30 seconds. IP Address, Port #, and Encryption Key Use these fields to specify the IP address, UDP port number, and encryption key of each RADIUS server. You can specify up to a maximum of three servers.
Appendix A AT-S39 Default Settings This appendix lists the AT-S39 factory default settings. Settings Default IP Address Subnet Mask 0.0.0.0 255.255.0.0 Gateway Address System Name MAC Aging Time Community Strings Get Community String Set Community String Trap Community String Spanning Tree Protocol Status Bridge Priority Bridge Max Age Time Bridge Hello Time Bridge Forwarding Delay Port Costs 0.0.0.
AT-S39 User’s Guide Settings Default Bridge Max Age Time Bridge Hello Time Bridge Forwarding Delay Port Costs 20 2 15 Auto detect 2 000 000 - 10 Mbps 200 000 - 100 Mbps 20 000 - 1000 Mbps Increment 8 (128) Auto Detect Yes Port Priority Point-to-Point Edge Port IGMP Snooping Status Topology Host/Router Time-out Interval Maximum Multicast Groups TACACS+ and RADIUS TACACS+ RADIUS Management Interface Manager Login Name (web browser session only) Manager Password Operator Login Name (web browser session on
AT-S39 Default Settings Settings Broadcast Frame Control 10/100 Mbps Interval Timer 1000 Mbps Interval Timer Maximum Number of Frames per Port Management Access Telnet SNMP TFTP RS232 Port Data Bits Stop Bits Parity Flow Control Data Rate Default 10 milliseconds 100 microseconds 0 (disabled) Enabled Disabled Enabled 8 1 None Full-duplex Auto-detect (default 9600 bps) 295
Index A aging time changing, 161, 276 defined, 151 AT-S39 default settings, 50, 224, 293 AT-S39 software security, 45 AT-S39 software updates downloading from a local session, 196 downloading via TFTP, 205 obtaining, 195 AT-S39 version number, 48 authentication protocols, 180, 289 Automatic port security level, 71 Auto-Negotiation, 65, 232 B Basic VLAN mode defined, 125 setting, 142, 266 bootloader version number, 48 BOOTP activating, 40, 217 defined, 40 BPDU, see bridge protocol data unit bridge forwardin
forwarding delay, 96, 102 G gateway address, 38, 216 H hello time, 97, 102, 252 host nodes defined, 166 displaying, 171, 283 host/router timeout interval, 169, 281 I IEEE 802.
AT-S39 User’s Guide deleting, 136, 264 displaying, 135, 265 modifying, 132, 263 priority queues, 163 priority, 104, 108, 252, 255 PVID.
port-based, defined, 113 tagged, defined, 120 VLAN identifier (VID), 113, 127, 133 VLAN identifier, 261 VLAN.
