Page 1 Management ® Software AT-S41 ◆ User’s Guide FOR THE AT-8326GB FAST ETHERNET SWITCH VERSION 1.0 PN 613-50283-00 Rev B...
Page 2 Copyright © 2003 Allied Telesyn, Inc. 960 Stewart Drive Suite B, Sunnyvale, CA 94085 USA All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, Inc. Microsoft is a registered trademark of Microsoft Corporation, Netscape Navigator is a registered trademark of Netscape Communications Corporation.
Page 3: Table Of Contents
Table of Contents Table of Contents ......................................... 3 List of Figures ........................................8 Preface ............................................10 How This Guide is Organized ...................................10 Document Conventions ....................................11 Where to Find Web-based Guides .................................12 Contacting Allied Telesyn Technical Support ............................13 Online Support ......................................13 E-mail and Telephone Support ................................13 For Sales or Corporate Information ..............................13 Obtaining Management Software Updates ...............................14 Section I...
Page 4 Activating DHCP ........................................41 Configuring SNMP Community Strings and Trap IP Addresses ......................42 Resetting the Management Software Default Values ..........................44 Rebooting a Switch ......................................45 Viewing the AT-S41 Switch Information ..............................46 Ping Execution ........................................47 Bootstrap Configuration ....................................49 Chapter 5 Port Parameters ........................................52 Configuring Port Parameters ...................................53...
Page 5 Chapter 10 Virtual LANs ..........................................89 VLAN Overview ........................................90 VLAN Modes........................................91 Tagged and Untagged VLAN Overview ...............................92 VLAN Name........................................92 VLAN Identifier ......................................92 Untagged and Tagged Ports ................................... 93 General Rules to Creating an Untagged or Tagged VLAN......................95 Creating a Tagged or Untagged VLAN .................................96 Phase 1 ..........................................
Page 6 Configuring SNMP Community Strings and Trap IP Addresses ....................... 164 Resetting the Management Software Default Values .......................... 166 Rebooting a Switch ......................................167 Viewing the AT-S41 Switch Information ..............................168 Ping Execution ........................................169 Bootstrap Configuration ....................................171 Chapter 19 Port Parameters .......................................
Page 7 Broadcast Storm Control ..................................... 229 Activating Broadcast Storm Control and Setting a Threshold ......................230 Chapter 29 Management Software Updates ................................231 Obtaining Software Updates ..................................232 Downloading a New Management Software Image Using TFTP ....................233 Appendix A AT-S41 Default Settings ....................................235...
Page 8: List Of Figures
List of Figures Figure 1: Connecting a Terminal or PC to the RS232 Terminal Port ....................28 Figure 2: AT-S41 Login Prompt - Local Management Session ......................29 Figure 3: AT-S41 Main Menu - Local Management Session ......................... 29 Figure 4: System IP Configuration Menu ..............................34 Figure 5: System Admin.
Page 9 Figure 38: Port Statistics Menu ..................................141 Figure 39: XModem Software Upgrade Menu ............................146 Figure 40: Local Management Window ..............................146 Figure 41: Send File Window ..................................147 Figure 42: XModem File Send Window ..............................147 Figure 43: TFTP Software Upgrade Menu ..............................149 Figure 44: Entering a Switch’s IP Address in the URL Field .......................
Page 10: Preface
How This Guide is Organized This manual is divided into three sections. Section I: Overview This section reviews the different ways that you can access the AT-S41 management software and describes the stacking features of the AT- 8326GB switch. Section II: Local and Telnet Management The chapters in this section explain how to manage a switch from a local management session or a Telnet management session.
Page 11: Document Conventions
AT-S41 User’s Guide Document Conventions This document uses the following conventions: Note Notes provide additional information. Warning Warnings inform you that performing or omitting a specific action may result in bodily injury. Caution Cautions inform you that performing or omitting a specific action...
Page 12: Where To Find Web-Based Guides
AT-S41 User’s Guide Where to Find Web-based Guides The Allied Telesyn Web site at www.alliedtelesyn.com contains PDF files of the Installation and User Guides for all Allied Telesyn products. The documents can be viewed online or downloaded onto a local...
Page 13: Contacting Allied Telesyn Technical Support
AT-S41 User’s Guide Contacting Allied Telesyn Technical Support This section provides Allied Telesyn contact information for technical support as well as sales or corporate information. Online Support You can request technical support online by accessing the Allied Telesyn Knowledge Base from the following web site: http://kb.alliedtelesyn.com.
Page 14: Obtaining Management Software Updates
AT-S41 User’s Guide Obtaining Management Software Updates New releases of management software for our managed products can be downloaded from the Allied Telesyn web site: http://www.alliedtelesyn.com.
Page 15: Section I
Section I Overview The chapters in this section provide an overview of the AT-S41 management software on the AT-8326GB Fast Ethernet switch. They review the different methods for accessing the management software and describe the stacking features of the switch.
Page 16: Management Software Overview
Appendix A, AT-S41 Default Settings on page 235. To actively manage a switch by changing or adjusting its operating parameters, you must access the switch’s AT-S41 management software. The AT-S41 software has a menu interface that makes it very easy to use.
Page 17 AT-S41 User’s Guide There are four different types of management sessions that you can use to access the AT-S41 management software on an AT-8326GB Fast Ethernet switch. They are: ❑ Local Management ❑ Telnet ❑ Web Browser ❑ SNMP This chapter briefly describes each type of management session.
Page 18: Local Management Session
AT-S41 User’s Guide Local Management Session You establish a local management session with an AT-8326GB Fast Ethernet switch by connecting either a terminal or a PC with a terminal emulator program to the RS232 terminal port on the front panel of the master switch, using a null-modem cable.
Page 19: Telnet Management Session
AT-S41 User’s Guide Telnet Management Session Any management workstation on your network that has the Telnet application protocol can be used to manage an AT-8326GB Fast Ethernet switch. In this guide, a Telnet management session is referred to as a remote management session because you can manage the switch from any workstation on your network that has the application protocol.
Page 20: Web Browser Management Session
AT-S41 User’s Guide Web Browser Management Session You can also use a Web browser to manage a switch. This is another type of remote management, just as a Telnet management session is considered remote, because any workstation on your network that has a Web browser can be used to manage an AT-8326GB stack.
Page 21: Snmp Management Session
AT-8326GB Fast Ethernet switch MIBs into the SNMP management program. For instructions, refer to your SNMP management documentation. The AT-S41 software supports the following MIBs: ❑ SNMP MIB-II (RFC 1213) ❑ Bridge MIB (RFC 1493) ❑ 4-Group RMON MIB (RFC 1757) ❑...
Page 22: Chapter 2 Stacking
Chapter 2 Stacking This chapter explains the stacking features of the AT-8326GB switch. The sections in this chapter include: ❑ Stacking Overview on page 23 ❑ Stacking and the Management Software on page 24...
Page 23: Stacking Overview
AT-S41 User’s Guide Stacking Overview The stacking feature can make it easier for you to manage the AT- 8326GB switches in your network. It offers the following benefits: ❑ You can manage up to six AT-8326GB switches from one local or remote management session.
Page 24: Stacking And The Management Software
AT-S41 User’s Guide Stacking and the Management Software If you are using the stacking feature of the AT-8326GB switch, the first thing that you should do before you perform any of the procedures in this guide is check to be sure that you are configuring the correct AT- 8326GB switch in the stack.
Page 25: Local And Telnet Management
Section II Local and Telnet Management The chapters in this section explain how to manage an AT-8326GB Fast Ethernet switch from a local or Telnet management session. The chapters include: ❑ Chapter 3: Starting a Local or Telnet Management Session on page 26 ❑...
Page 26: Starting A Local Or Telnet Management Session
Chapter 3 Starting a Local or Telnet Management Session This chapter contains the procedures for starting local and Telnet management sessions on an AT-8326GB Fast Ethernet switch. The sections in this chapter are: ❑ Local Management Session on page 27 ❑...
Page 27: Local Management Session
On the front panel of the AT-8326GB switch is an RS232 terminal port. You use this port to establish a local management session with the switch’s AT-S41 management software. A local management session is so named because you must be close to the switch, usually within a few meters, to start this type of management session.
Page 28: Starting A Local Management Session
AT-S41 User’s Guide Starting a Local To start a local management session, perform the following procedure: Management 1. Connect one end of the null modem management cable included Session with the switch to the RS232 Terminal Port on a master of the stack.
Page 29: Figure 2 At-S41 Login Prompt - Local Management Session
Allied Telesyn International Corp. Copyright, 2001 ================================================== Login Menu Login: manager Password: _ Figure 2 AT-S41 Login Prompt - Local Management Session The switch then displays the management software’s Main Menu, as shown below. AT-8326GB Local Management System Main Menu [G]eneral Information [B]asic Switch Configuration...
Page 30: Quitting From A Local Session
AT-S41 User’s Guide Quitting from a To quit a local session, return to the Main Menu and type Q for Quit. Local Session You should always exit from a management session when you are finished managing a switch. This can prevent unauthorized individuals from making changes to a switch’s configuration should you leave your...
Page 31: Telnet Management Session
AT-S41 User’s Guide Telnet Management Session You can use the Telnet application protocol from a workstation on your network to manage an AT-8326GB stack. This type of management is referred to as remote management because you do not have to be physically close to the stack to start the session, such as with a local management session.
Page 32: Basic Switch Parameters
42 ❑ Resetting the Management Software Default Values on page ❑ Rebooting a Switch on page 45 ❑ Viewing the AT-S41 Switch Information on page 46 ❑ Ping Execution on page 47 ❑ Bootstrap Configuration on page 49...
Page 33: When Does An At-8326Gb Switch Need An Ip Address
AT-S41 User’s Guide When Does an AT-8326GB Switch Need an IP Address? One of your first tasks as you begin to build your network will be to determine which of the switches in your network should be assigned unique IP addresses.
Page 34: Configuring An Ip Address
AT-S41 User’s Guide Configuring an IP Address The procedure in this section explains how to manually assign an IP address, subnet mask, and gateway address to an AT-8326GB stack from a local or Telnet management session, as well as how to enable DHCP. If you want the stack to obtain its IP configuration from a DHCP server on your network, go to the procedure Activating DHCP on page 41.
Page 35 AT-S41 User’s Guide Subnet [M]ask This command specifies a subnet mask for the stack. Default [G]ateway Address This command specifies the default router’s IP address. This address is required if you intend to remotely manage the stack from a management station that is separated from the stack by a router.
Page 36: Configuring System Administration Information
AT-S41 User’s Guide Configuring System Administration Information The procedure in this section explains how to assign a name to the switch, along with other optional information, such as the name of the administrator responsible for maintaining the unit and the location of the AT-8326GB stack.
Page 37 AT-S41 User’s Guide Note It is advised that you assign each stack a name. The names can help you identify the various stacks when you manage them and can help you avoid performing configuration procedures on the wrong stack. Set System [L]ocation This command specifies the location of the stack.
Page 38: Setting The User Interface Configuration
AT-S41 User’s Guide Setting the User Interface Configuration The procedure in this section explains how to set the AT-S41 user interface security features, including idle timeouts, how to enable and disable the different management session options, and how to change the login user name and password.
Page 39 AT-S41 User’s Guide the local management station after the specified period of time. This security feature can prevent unauthorized individuals from using your management station should you step away from your system while configuring a stack. The default for the console timeout value is 5 minutes.You can set the timeout for between 0...
Page 40 AT-S41 User’s Guide Enable/Disable [S]NMP Agent This command allows you to disable the SNMP management feature on the stack, and so prevent individuals from managing the stack remotely using an SNMP agent. Enable/Disable [W]eb Server This command allows you to disable the Web browser management feature on the stack, and so prevent individuals from managing the stack remotely using a Web browser.
Page 41: Activating Dhcp
AT-S41 User’s Guide Activating DHCP This application protocol was developed to simplify network management. It is used to automatically assign IP configuration information such as an IP address, subnet mask, and, in some instances, a default gateway address to the devices on your network,.
Page 42: Configuring Snmp Community Strings And Trap Ip Addresses
AT-S41 User’s Guide Configuring SNMP Community Strings and Trap IP Addresses To configure the SNMP community strings for the stack and to assign up to four IP addresses of management stations to receive traps from the stack, perform the following procedure: 1.
Page 43 AT-S41 User’s Guide Enable/Disable SNMP [T]rap Receiver This command specifies the status of a trap receiver. This parameter can be set to E for enable or D to disable. [A]dd SNMP Trap Receiver This command allows you to add an SNMP trap receiver. The range is set of 1 to 4.
Page 44: Resetting The Management Software Default Values
AT-S41 User’s Guide Resetting the Management Software Default Values The procedure in this section returns all management parameters in a stack to their default values. This procedure also deletes any VLANs that you have created in the stack. Note The management software default values can be found in Appendix A on page 235.
Page 45: Rebooting A Switch
AT-S41 User’s Guide Rebooting a Switch To reboot a switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2. From the Switch Tools Configuration Menu, type R to select System Reboot. The System Reboot Menu is displayed in Figure 9.
Page 46: Viewing The At-S41 Switch Information
AT-S41 User’s Guide Viewing the AT-S41 Switch Information The procedure in this section explains how to display general information about the stack, including: ❑ Administration information ❑ Bootcode version number ❑ Hardware information ❑ System information, including MAC address To display the stack information, perform the following procedure: 1.
Page 47: Ping Execution
AT-S41 User’s Guide Ping Execution To configure the ping execution settings on the switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools. 2. From the Switch Tools Configuration Menu, type P to select Ping Execution.
Page 48: Figure 12 Ping Results
AT-S41 User’s Guide 4. Select one of the two ping test options by typing the corresponding bracketed letter: Execute Ping or Stop Ping. [E]xecute Ping Starts the ping process and displays ping test results. Also allows you to clean out the ping test configuration cache by typing C for Clean Ping Data.
Page 49: Bootstrap Configuration
AT-S41 User’s Guide Bootstrap Configuration The bootstrap feature allows you to download new software and configuration settings when you boot up the switch. To configure the bootstrap settings on the switch, perform the following procedure: 1. From the Main Menu, type T to select Switch Tools.
Page 50 AT-S41 User’s Guide Remote If you choose the remote boot load mode, the stack downloads software from a TFTP server and boots using the newly downloaded management software. Set Boot [M]ode If you are using the remote boot load mode, you need to specify how the stack should download the new management software.
Page 51 AT-S41 User’s Guide Set [F]ile Type If you selected the remote boot load mode, you can choose what kind of files the switch will download while it is booting up. There are three file type options: Image An image file is the management software for the stack.
Page 52: Chapter 5 Port Parameters
Chapter 5 Port Parameters This chapter contains procedures for viewing and changing the parameter settings for the individual ports on a stack. This chapter contains the following procedures: ❑ Configuring Port Parameters on page 53 ❑ Configuring Gigabit Port Type on page 56...
Page 53: Configuring Port Parameters
AT-S41 User’s Guide Configuring Port Parameters To configure the parameter settings for a port on the stack, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type P to select Port Configuration.
Page 54 AT-S41 User’s Guide Type The port types. Ports 1-24 are 10/100Base-TX and can operate at 10/100 Mbps. Ports 25-26 are 1000Base-TX and can operate at 10/100/1000 Mbps. Link The status of the link between the port and the end node connected to the port.
Page 55 AT-S41 User’s Guide Possible values are: Enabled - The port is allowed to use flow control. This is the default setting for all of the ports on the stack. Disabled - The port is not configured to use flow control.
Page 56: Configuring Gigabit Port Type
The default port type setting is twisted pair. In order to change the use of these ports from one type to another, the port type must be changed in the AT-S41 management software. To configure the gigabit port type, perform the following procedure: 1.
Page 57 AT-S41 User’s Guide 6. Enter your selection. Type G to make the port a GBIC port or T to make the port a twisted pair port. The port type change is displayed immediately in the Select Giga Port Type Menu.
Page 58: Chapter 6 Port Security
Chapter 6 Port Security This chapter contains the procedures for setting port security. The sections in this chapter include: ❑ Port Security Overview on page 59 ❑ Configuring Port Security on page 61 ❑ Setting a Threshold on page 63...
Page 59: Port Security Overview
AT-S41 User’s Guide Port Security Overview The port security feature can enhance the security of your network. You can use the feature to control the number of MAC addresses learned on the ports, and so control the number of network devices that can forward frames through the stack.
Page 60 AT-S41 User’s Guide The MAC aging time is disabled under this security level. The dynamic MAC addresses learned on a port and added to the MAC address table remain in the table and are never purged, even when the end nodes are...
Page 61: Configuring Port Security
AT-S41 User’s Guide Configuring Port Security To set a port’s security level, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type P to select Port Security Configuration.
Page 62 AT-S41 User’s Guide 6. Select the desired security level. ❑ To disable security on the port, type N to select Normal mode. This is the default security setting. A port operating in Normal mode does not have any restrictions on the number of MAC addresses it can learn.
Page 63: Setting A Threshold
AT-S41 User’s Guide Setting a Threshold The Limited security mode lets you set a maximum number of dynamic MAC addresses a port on a switch can learn. Once the maximum number of MAC addresses have been learned by a port, frames with new source MAC addresses are discarded and are not forwarded by the port.
Page 64: Setting Intrusion Detection
AT-S41 User’s Guide Setting Intrusion Detection The Limited and Secure security modes let you determine how the switch responds when it receives MAC addresses in excess of its threshold. 1. Perform the procedure Configuring Port Security on page 61. 2. Type D to select Set Intrusion Detection.
Page 65: Chapter 7 Port Trunking
Chapter 7 Port Trunking This chapter contains the procedures for configuring port trunks. Sections in the chapter include: ❑ Port Trunking Overview on page 66 ❑ Creating a Port Trunk on page 69 ❑ Deleting a Port Trunk on page 71 ❑...
Page 66: Port Trunking Overview
AT-S41 User’s Guide Port Trunking Overview Port trunking is an economical way for you to increase the bandwidth between an AT-8326GB switch and another network device, such as a server, router, workstation, or another Ethernet switch. A port trunk can consist of up to four 10/100 Mbps ports or two 10/100/1000 Mbps ports that have been grouped together to function as one logical path to an end node.
Page 67: Figure 18: Port Trunk Example 1
AT-S41 User’s Guide ❑ When cabling a trunk, the order of the connections should be maintained on both nodes. The lowest numbered port in a trunk on the switch should be connected to the lowest numbered port of the trunk on the other device, the next lowest numbered port on the switch should be connected to the next lowest numbered port on the other device, and so on.
Page 68: Figure 19: Port Trunk Example 2
AT-S41 User’s Guide You can also use port trunks to increase the bandwidth between switches. The example in Figure 19 shows a port trunk of four data links between two AT-8326GB switches. GIGA AT-8326GB 24 + 2G Managed Switch LNK/ACT...
Page 69: Creating A Port Trunk
AT-S41 User’s Guide Creating a Port Trunk This section contains the procedure for creating a port trunk on a stack. Be sure to review the guidelines in the Port Trunking Overview on page 66 before performing this procedure. Caution Do not connect the cables to the trunk ports on the stack until after you have configured the trunk with the management software.
Page 70 AT-S41 User’s Guide 3. Type I to choose Select Stack ID and enter the ID number of the switch in the stack where you want to create the port trunk. (You can skip this step to create the port trunk on the master switch, since the master switch is selected by default.)
Page 71: Deleting A Port Trunk
AT-S41 User’s Guide Deleting a Port Trunk Caution Disconnect the cables from the port trunk on the switch before performing the following procedure. Removing a port trunk without first disconnecting the cables can create loops in your network topology. Data loops can result in broadcast storms and poor network performance.
Page 72: Setting Port Trunk Status
AT-S41 User’s Guide Setting Port Trunk Status To enable or disable a port trunk, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type T to select the Trunk Configuration Menu.
Page 73: Chapter 8 Port Monitoring
Chapter 8 Port Monitoring This chapter contains the procedures for configuring port monitoring. Sections in the chapter include: ❑ Port Monitoring Overview on page 74 ❑ Enabling Port Monitoring on page 75 ❑ Modifying Port Monitoring on page 77 ❑ Disabling Port Monitoring on page 78...
Page 74: Port Monitoring Overview
AT-S41 User’s Guide Port Monitoring Overview The port monitoring feature allows you to unobtrusively monitor the traffic being received and transmitted on a port on the switch by having the traffic copied to another switch port. You can connect a network analyzer to the port functioning as the monitoring port to monitor the traffic without impacting network performance or speed.
Page 75: Enabling Port Monitoring
AT-S41 User’s Guide Enabling Port Monitoring To enable port monitoring, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration.
Page 76 AT-S41 User’s Guide 5. Type M to select Set Monitored Port. The following prompt is displayed: Set monitored port->Enter port number> 6. Enter the number of the port whose traffic is to be monitored. The default monitored port is Port 1. You can specify only one port to be monitored.
Page 77: Modifying Port Monitoring
AT-S41 User’s Guide Modifying Port Monitoring To modify the port monitoring configuration, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration.
Page 78: Disabling Port Monitoring
AT-S41 User’s Guide Disabling Port Monitoring To disable port monitoring, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type M to select Port Monitoring Configuration.
Page 79: Spanning Tree Protocol
Chapter 9 Spanning Tree Protocol This chapter provides introductory information on the Spanning Tree Protocol (STP) and explains how to adjust the STP bridge and port parameters. The sections in this chapter include: ❑ STP Overview on page 80 ❑ Configuring a Bridge’s STP Settings on page 84 ❑...
Page 80: Stp Overview
AT-S41 User’s Guide STP Overview The AT-8326GB Fast Ethernet switch supports the Spanning Tree Protocol, as specified in the IEEE 802.1D standard. STP can be an important part of large networks where loops, either planned or unplanned, exist in the network topology.
Page 81: Finding And Resolving Redundant Paths
AT-S41 User’s Guide Finding and Once the root bridge has been selected, the bridges must determine if the network contains redundant paths and, if one is found, they must Resolving select a preferred path while placing the redundant paths in a backup or Redundant blocking state.
Page 82: Handling Topology Changes
AT-S41 User’s Guide The cost of a path is cumulative; the final cost of a path is the value of all ports between a bridge and the root bridge. If two paths have the same port cost, the preferred path is selected through port priority.
Page 83 AT-S41 User’s Guide The root bridge will periodically transmit a BPDU to determine whether there have been any changes to the network topology and to inform other bridges of topology changes. The frequency with which the root bridge sends out a BPDU is called the Hello Time. This is a value that you can set on the AT-8326GB Fast Ethernet switches.
Page 84: Configuring A Bridge's Stp Settings
AT-S41 User’s Guide Configuring a Bridge’s STP Settings This section contains the procedure for configuring a bridge’s STP settings. Caution STP on a bridge is disabled by default. If you enable STP, the bridge provides default STP parameters that are adequate for most networks.
Page 85 AT-S41 User’s Guide Enable/Disable [S]TP Enables and disables STP on the switch. The default setting is disabled. Set Bridge Pr[i]ority The priority number for the bridge. This number is used in determining the root bridge for STP. The bridge with the lowest priority number is selected as the root bridge.
Page 86 AT-S41 User’s Guide Spanning Tree [P]ort Configuration Allows configuration of Port Priority, Path Cost, Trunk Priority, and Trunk Path Cost. Refer to the next section for instructions on how to configure these parameters.
Page 87: Configuring Stp Port Settings
AT-S41 User’s Guide Configuring STP Port Settings To configure the STP port parameters, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type S to select Spanning Tree Configuration.
Page 88 AT-S41 User’s Guide Set Path [C]ost Sets the cost parameter used in deciding which port provides the lowest cost path to the root bridge for that LAN. The range is 1 to 65535. Set [T]runk Priority Sets the parameter used as a tie breaker when two or more trunk groups are determined to have equal costs to the root bridge.
Page 89: Chapter 10 Virtual Lans
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 contains the following sections: ❑ VLAN Overview on page 90 ❑...
Page 90: Vlan Overview
AT-S41 User’s Guide VLAN Overview A VLAN is a group of ports on an Ethernet switch that form a logical Ethernet segment. The ports of a VLAN form an independent broadcast domain where the traffic generated by the nodes of a VLAN remains within the VLAN.
Page 91: Vlan Modes
AT-S41 User’s Guide But with VLANS, you can change the LAN segment assignment of an end node connected to the switch through the switch’s AT-S41 management software. VLAN memberships can be changed any time through the management software without moving the workstations physically, or having to change group memberships by moving cables from one switch port to another.
Page 92: Tagged And Untagged Vlan Overview
AT-S41 User’s Guide Tagged and Untagged VLAN Overview As explained in the VLAN Overview section, a VLAN consists of a group of ports on one or more Ethernet switches that form a logical Ethernet segment and an independent broadcast domain. Traffic generated by...
Page 93: Untagged And Tagged Ports
AT-S41 User’s Guide Untagged and There are two kinds of ports that you can assign to an IEEE 802.1Q- compliant VLAN: tagged ports and untagged ports. The basic difference Tagged Ports between the two is that an untagged port can be a member of only one VLAN at a time while a tagged port can be a member of multiple VLANs.
Page 94 AT-S41 User’s Guide explained next, where VLAN membership is determined by information within the frames themselves.) Frames received on untagged ports and lacking any VLAN identifying information are referred to as untagged frames. When a switch receives a frame on an untagged port, it first examines the PVID of the port on which the frame was received and then adds the PVID to the frame itself.
Page 95: General Rules To Creating An Untagged Or Tagged Vlan
AT-S41 User’s Guide Tagged VLANs are also useful where multiple VLANs span across switches. You can use one port per switch for connecting all VLANs on the switch to another switch. The IEEE 802.1Q standard deals with how this tagging information is used to forward the traffic throughout the switch.
Page 96: Creating A Tagged Or Untagged Vlan
AT-S41 User’s Guide Creating a Tagged or Untagged VLAN The procedure for creating a new VLAN is divided into the following phases: ❑ Phase 1: Assigning a VID and name and specifying the port members ❑ Phase 2: Converting tagged ports into untagged ports Performing Phase 1 is required whenever you create a new VLAN.
Page 97: Figure 25 Vlan Creation Menu
AT-S41 User’s Guide Note Check to make sure the VLAN Type is set to 802.1Q. 802.1Q is the default VLAN Type. You can create tagged and untagged VLANs only when the switch is operating in the 802.1Q mode. For instructions on how to change the switch’s VLAN mode, see Setting the VLAN Type on page 114.
Page 98 AT-S41 User’s Guide 6. Type N to select Set VLAN Name. The following prompt is displayed: Enter VLAN Name ->Enter VLAN Name > 7. Enter a VLAN name of up to 32 characters. Press Enter The name should reflect the function of the nodes that will be a part of the VLAN (for example, Sales or Accounting).
Page 99: Phase 2
AT-S41 User’s Guide However, it is important to note that, by default, all of the ports that you just added to the new VLAN are tagged ports, meaning they are shared ports. The ports are still members of their current VLANs.
Page 100 AT-S41 User’s Guide This menu lists the ports on the switch and each port’s current PVID assignment. For example, referring to the figure above, Ports 1 to 8 on the switch all have a PVID of 1, meaning that they are untagged members of the Default VLAN, which has a VID of 1.
Page 101: Viewing Or Modifying A Tagged Or Untagged Vlan
AT-S41 User’s Guide Viewing or Modifying a Tagged or Untagged VLAN There are two phases to modifying a VLAN. You might need to perform both phases or just one of them, depending on what it is you want to change in the VLAN. The phases are: ❑...
Page 102: Figure 27 Config Vlan Member Menu
AT-S41 User’s Guide The Config VLAN Member Menu for the VLAN is displayed, as shown in Figure 27. This menu contains all the current information about the VLAN. AT-8326GB Local Management System VLAN MAnagement-> Config VLAN Member Menu Stack ID: 1...
Page 103: Phase 2
AT-S41 User’s Guide a. Type I to choose Select Stack ID and enter the number of the switch in the stack containing ports that you want to add or remove from the VLAN. (You can skip this step if the ports are located on the master switch, since the default selection is the master switch.)
Page 104 AT-S41 User’s Guide This menu lists the ports on the switch and each port’s current PVID assignment. For example, referring to the figure above, Ports 1 to 8 on the switch all have a PVID of 1, meaning that they are untagged members of the Default VLAN, which has a VID of 1.
Page 105: Deleting A Tagged Or Untagged Vlan
AT-S41 User’s Guide Deleting a Tagged or Untagged VLAN To delete a VLAN, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management.
Page 106: Port-Based Vlan Mode Overview
AT-S41 User’s Guide Port-based VLAN Mode Overview The AT-8326GB switch features a special Port-based VLAN mode. This VLAN mode allows you to create VLANs that are slightly different than the tagged and untagged VLANs described earlier in this chapter. Note...
Page 107: Creating A Port-Based Vlan
AT-S41 User’s Guide Creating a Port-based VLAN To create a new port-based VLAN, perform the following procedure: Note This procedure assumes that the switch is set to the Port-based VLAN Type. For instructions on how to change the VLAN Type on the switch, refer to Setting the VLAN Type on page 114.
Page 108 AT-S41 User’s Guide 5. Type I to select Set VLAN ID/Index. The following prompt is displayed: Enter VLAN ID ->Enter VLAN ID > 6. Enter a unique VLAN ID for the VLAN. Press Enter. Since the stack does not examine the VID in tagged headers of tagged frames when operating in the Port-based VLAN mode, this VID value does not need to be unique from all other VLANs in your network.
Page 109 AT-S41 User’s Guide Note The ports that you just added to the new VLAN are not removed from their current VLAN assignments. You must remove the ports manually from the other VLANs if you do not want them to be shared.
Page 110: Modifying A Port-Based Vlan
AT-S41 User’s Guide Modifying a Port-based VLAN The following procedure explains how to change the name of a port- based VLAN, as well as add or remove ports. To modify a port-based VLAN, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu.
Page 111 AT-S41 User’s Guide 5. To modify the VLAN, use the commands at the bottom of the screen. The commands are described below: [C]hange a VLAN Name This command is used to change a VLAN’s name. Type C and enter the new name at the command prompt.
Page 112: Setting Gvrp Status
AT-S41 User’s Guide Setting GVRP Status To set the GVRP status, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu. 2. From the Advanced Switch Configuration Menu, type V to select VLAN Management.
Page 113: Resetting The Vlan Parameters To Default
AT-S41 User’s Guide Resetting the VLAN Parameters to Default This command deletes all VLANs that you created. All ports are returned back to the Default VLAN. To reset the default VLAN parameters of the switch, perform the following procedure: 1. From the Main Menu, type A to select the Advanced Switch Configuration Menu.
Page 114: Setting The Vlan Type
AT-S41 User’s Guide Setting the VLAN Type The AT-8326GB switch can operate in either the 802.1Q VLAN mode for creating tagged and untagged VLANs or the port-based VLAN mode. Note The VLAN Type default is 802.1Q. The change the VLAN mode, perform the following procedure: 1.
Page 115: Chapter 11 Mac Address Table
Chapter 11 MAC Address Table This chapter contains the procedures for viewing the MAC address table. The sections in this chapter include: ❑ MAC Address Overview on page 116 ❑ Displaying MAC Addresses on page 118 ❑ Viewing MAC Addresses by Port on page 120 ❑...
Page 116: Mac Address Overview
AT-S41 User’s Guide MAC Address Overview Every hardware device on your network has a unique MAC address. This address is assigned to the device by the device’s manufacturer. For example, when you install a network interface card (NIC) in a computer so that you can connect it to the network, the NIC already has a MAC address assigned to it by its manufacturer.
Page 117 AT-S41 User’s Guide on which the packet was received. This prevents packets from being forwarded onto inappropriate LAN segments and increases network security. When the destination node responds, the switch adds its MAC address and port number to the table.
Page 118: Displaying Mac Addresses
AT-S41 User’s Guide Displaying MAC Addresses To display the MAC address table, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database.
Page 119: Figure 32 Display Mac Address By Mac Menu
AT-S41 User’s Guide The management software displays the MAC addresses based on your selection. Figure 32 is an example of the Display MAC Address by MAC option, which displays both static and dynamic MAC addresses. AT-8326GB Local Management System Forwarding Database Menu -> Display MAC Address by MAC Age-Out Time: 300 Sec.
Page 120: Viewing Mac Addresses By Port
AT-S41 User’s Guide Viewing MAC Addresses by Port This section contains the procedure for viewing the dynamic MAC addresses that have been learned on a particular port. You can also use this procedure to view any static MAC addresses that have been assigned to a port.
Page 121: Viewing The Mac Addresses By Mac
AT-S41 User’s Guide Viewing the MAC Addresses by MAC This section contains the procedure for viewing the dynamic MAC addresses learned on the ports of a switch. They are displayed in numerical order. This procedure will also let you view all static MAC addresses that have been assigned to any port(s) on the switch.
Page 122: Viewing The Mac Addresses Of A Vlan
AT-S41 User’s Guide Viewing the MAC Addresses of a VLAN The procedure in this section can be useful if you created VLANs on the switch and want to view the MAC addresses of the nodes of a particular VLAN. (This procedure is not of much value if the switch contains only the Default VLAN, in which case displaying the entire MAC address table, as explained earlier in this chapter, produces the same result.)
Page 123: Adding Static Mac Addresses
AT-S41 User’s Guide Adding Static MAC Addresses The management software allows you to assign up to 256 static MAC addresses on an AT-8326GB Fast Ethernet switch. To add a static address to the MAC address table, perform the following procedure: 1.
Page 124: Deleting Static Mac Addresses
AT-S41 User’s Guide Deleting Static MAC Addresses To delete a static MAC address, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type F to select Forwarding Database.
Page 125: Changing The Aging Time
AT-S41 User’s Guide Changing the Aging Time The switch uses the aging time to delete inactive dynamic MAC addresses from the MAC address table. When the switch detects that no packets have been received from a particular MAC address in the table after the period specified by the aging time, the switch deletes the address.
Page 126: Chapter 12 Quality Of Service
Chapter 12 Quality of Service This chapter contains the procedures for configuring the Quality of Service (QoS) feature of the AT-S41 software. Sections in the chapter include: ❑ Quality of Service Overview on page 127 ❑ Configuring QoS on page 128...
Page 127: Quality Of Service Overview
1 is placed in the low priority queue. These priority-to-queue assignments can be overridden using the AT-S41 management software on a per port basis. Note QoS is disabled by default on the switch.
Page 128: Configuring Qos
AT-S41 User’s Guide Configuring QoS To configure QoS on the switch, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type S to select Quality of Service Configuration.
Page 129 AT-S41 User’s Guide 6. Enter a traffic class. The following prompt is displayed, where X equals the traffic class specified in the last step. Enter queue for traffic class X> Queue is in range of 0 to 1 7. Enter a priority queue (0 - 1).
Page 130: Chapter 13 Igmp Snooping
Chapter 13 IGMP Snooping This chapter explains how to activate and configure the IGMP snooping feature on the switch. Sections in the chapter include: ❑ IGMP Snooping Overview on page 131 ❑ Activating IGMP Snooping on page 132 ❑ Viewing Group Members on page 134...
Page 131: Igmp Snooping Overview
Such flooding of packets can negatively impact switch and network performance. Note By default, IGMP snooping is disabled on the switch. Note The AT-S41 software supports both IGMP version 1 and version 2.
Page 132: Activating Igmp Snooping
AT-S41 User’s Guide Activating IGMP Snooping To enable or disable IGMP snooping on the switch and to configure IGMP snooping parameters, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration. 2. From the Advanced Switch Configuration Menu, type I to select the IGMP Snooping Configuration.
Page 133 AT-S41 User’s Guide This parameter also specifies the time interval used by the switch in determining whether a multicast router is still active. The switch makes the determination by watching for queries from the router. If the switch does not detect any queries from a multicast router during the specified time interval, it assumes that the router is no longer active on the port.
Page 134: Viewing Group Members
AT-S41 User’s Guide Viewing Group Members You can use the AT-S41 software to display a list of the members of each multicast group on a switch. To display the list, perform the following procedure: 1. From the Main Menu, type A to select Advanced Switch Configuration.
Page 135 AT-S41 User’s Guide Group Members The port(s) on the switch to which one or more host nodes of the multicast group are connected. VLAN ID The VLAN ID of the VLAN the multicast group belongs to.
Page 136: Broadcast Storm Control
Chapter 14 Broadcast Storm Control This chapter contains the procedures for configuring the broadcast storm control feature of the AT-S41 management software. Sections in the chapter include: ❑ Broadcast Storm Control Overview on page 137 ❑ Activating Broadcast Storm Control on page 138...
Page 137: Broadcast Storm Control Overview
Should the performance of your network has been diminished by heavy broadcast traffic, you can use the AT-S41 management software to limit the number of broadcast frames passing through the switch and so limit the number of broadcast frames on your network.
Page 138: Activating Broadcast Storm Control
AT-S41 User’s Guide Activating Broadcast Storm Control To activate the Broadcast Storm Control feature for the switch, perform the following procedure: 1. From the Main Menu, type B to select Basic Switch Configuration. 2. From the Basic Switch Configuration Menu, type C to select Storm Control Configuration.
Page 139: Chapter 15 Port Statistics
Chapter 15 Port Statistics This chapter contains the procedure for displaying data traffic statistics. This chapter includes the following section: ❑ Displaying Port Statistics on page 140...
Page 140: Displaying Port Statistics
AT-S41 User’s Guide Displaying Port Statistics To display Ethernet port statistics, perform the following procedure: 1. From the Main Menu, type S to select Statistics. The Statistics Menu is displayed in Figure 37. AT-8326GB Local Management System Main Menu -> Statistics Menu...
Page 141: Figure 38 Port Statistics Menu
AT-S41 User’s Guide The Statistics Menu for a selected port is displayed in Figure 37. AT-8326GB Local Management System Enter the character in square brackets to select option Main Menu -> Statistics Menu Stack ID: 1 Port: 9 Elapsed Time Since System Up: 000:01:00:30 <Counter Name>...
Page 142 AT-S41 User’s Guide Oversize Packets Number of packets exceeding the maximum specified by IEEE 802.3 (1518 bytes including the CRC) received on the port. Fragments Number of undersized packets, packets with alignment errors, and packets with FCS errors (CRC errors) received on the port.
Page 143: Management Software Updates
Chapter 16 Management Software Updates This chapter explains how to obtain new versions of the AT-S41 management software and how to download the software onto an AT-8326GB switch. You can download new management software onto a switch using either of the following methods: ❑...
Page 144: Obtaining Software Updates
AT-S41 User’s Guide Obtaining Software Updates New releases of the AT-S41 management software are available from the Allied Telesyn web site at www.alliedtelesyn.com and from our FTP server at ftp.alliedtelesyn.com. To log on to the FTP server, enter “anonymous” for the user name and your email address for the password.
Page 145: Downloading New Management Software From A Local Management Session
Downloading New Management Software from a Local Management Session This section contains the procedure for downloading a new version of AT-S41 management software onto a switch from a local management session. The procedure takes approximately 7 to 10 minutes to complete.
Page 146: Figure 39 Xmodem Software Upgrade Menu
AT-S41 User’s Guide The XModem Software Upgrade Menu is displayed in Figure 39. AT-8326GB Local Management System Enter the character in square brackets to select option Software Upgrade -> XModem Software Upgrade Menu Image Version/Date: 1.00E/Jan 15 2002 19:48:12 Baud Rate :...
Page 147: Figure 41 Send File Window
AT-S41 User’s Guide The Send File pop-up window is displayed in Figure 41. Figure 41 Send File Window 9. Click the Browse button on the Send File window to specify the location of the software. 10. Click on the Protocol field and set to 1K Xmodem transfer protocol.
Page 148: Downloading A New Management Software Image Using Tftp
To download the new AT-S41 software image onto your AT-8326GB switch, perform the following procedure: 1. Establish a local management session on the switch where you intend to download the new management software.
Page 149: Figure 43 Tftp Software Upgrade Menu
Enter the character in square brackets to select option Figure 43 TFTP Software Upgrade Menu You will need to provide the following information when using the TFTP client software to download the AT-S41 software image. The options in the window are defined below. Set TFTP [S]erver IP Address This is the IP address of the server from which you are downloading the new software.
Page 150 AT-S41 User’s Guide The following prompt is displayed: Download file (Y/N)> 8. Type Y to select Yes. The software immediately begins to download onto the switch’s CPU. This process will take seconds to complete. Once the new software download process has completed, the switch begins to initialize the software.
Page 151: Web Browser Management
Section III Web Browser Management The chapters in this section explain how to manage an AT-8326GB Fast Ethernet switch using a Web browser. The chapters include: ❑ Chapter 17, Starting a Web Browser Management Session on page 152 ❑ Chapter 18, Basic Switch Parameters on page 156 ❑...
Page 152: Starting A Web Browser Management Session
Chapter 17 Starting a Web Browser Management Session This chapter contains the procedure for starting a management session on an AT-8326GB stack using a Web browser such as Microsoft Internet Explorer or Netscape Navigator.
Page 153: Starting A Web Browser Management Session
AT-S41 User’s Guide Starting a Web Browser Management Session This section explains how to start a Web browser management session. Note In order for you to manage an AT-8326GB stack using a Web browser, the switch must have an IP address. Initially assigning an IP address to a switch can only be done through a local management session.
Page 154: Figure 45 Management Software Home Page
AT-S41 User’s Guide The management software home page will appear, as displayed in Figure 45. Figure 45 Management Software Home Page This is the home page of the management software. The menu tabs are visible at the top of the home page: ❑...
Page 155: Browser Tools
AT-S41 User’s Guide Browser Tools You can use your browser’s bookmark feature to remember frequently- used menu pages. Quitting from a To exit from a Web browser management session, close the Web browser. Web Browser Management Session...
Page 156: Basic Switch Parameters
164 ❑ Resetting the Management Software Default Values on page ❑ Rebooting a Switch on page 167 ❑ Viewing the AT-S41 Switch Information on page 168 ❑ Ping Execution on page 169 ❑ Bootstrap Configuration on page 171...
Page 157: Configuring An Ip Address
AT-S41 User’s Guide Configuring an IP Address Note For guidelines on when to assign an IP address, subnet address, and gateway address to an AT-8326GB switch, refer to When Does an AT-8326GB Switch Need an IP Address? on page 33.
Page 158 AT-S41 User’s Guide System IP Address This parameter specifies the IP address of the switch. You must specify an IP address if you intend to remotely manage the switch using a Web browser, a Telnet utility, or an SNMP management program.
Page 159: Configuring System Administration Information
AT-S41 User’s Guide Configuring System Administration Information The procedure in this section explains how to assign a name to the switch, along with other optional information, such as the name of the administrator responsible for maintaining the unit and the location of the switch.
Page 160 AT-S41 User’s Guide System Name This parameter specifies a name for the switch (for example, Sales). This parameter is optional and may contain up to 50 characters. Note It is advised that you assign each switch a name. The names can help...
Page 161: Setting The User Interface Configuration
AT-S41 User’s Guide Setting the User Interface Configuration The procedure in this section explains how to set the user interface or security features of the switch, including idle timeouts and how to enable and disable the different management session options.
Page 162 AT-S41 User’s Guide Telnet UI Idle Timeout This parameter causes the management software to automatically end a management session if it does not detect any activity from the remote management station after the specified period of time. This security feature can prevent unauthorized individuals from using your management station should you step away from your system while configuring a switch.
Page 163: Activating Dhcp
AT-S41 User’s Guide Activating DHCP This application protocol was developed to simplify network management. It is used to automatically assign IP configuration information to the devices on your network, such as an IP address, subnet mask, and, in some instances, a default gateway address.
Page 164: Configuring Snmp Community Strings And Trap Ip Addresses
AT-S41 User’s Guide Configuring SNMP Community Strings and Trap IP Addresses To configure the SNMP community strings for the switch and to assign up to four IP addresses of management stations to receive traps from the switch, perform the following procedure: 1.
Page 165 AT-S41 User’s Guide SNMP Trap Receivers: IP Address Allows you to add up to four SNMP trap receivers. SNMP Trap Receivers: Community Allows you to add a community name for each SNMP trap receiver. Enable/Disable/Delete SNMP Trap Receiver Allows you to specify the status of a trap receiver or to delete the trap receiver.
Page 166: Resetting The Management Software Default Values
AT-S41 User’s Guide Resetting the Management Software Default Values The procedure in this section returns all management parameters to their default values. This procedure also deletes any VLANs that you have created on the switch. Note The management software default values can be found in Appendix A on on page 235.
Page 167: Rebooting A Switch
AT-S41 User’s Guide Rebooting a Switch To reboot a switch, perform the following procedure: 1. Click on the Tools menu tab and select System Reboot from the sub- menu. The System Reboot Configuration page will be displayed, as shown in Figure 51.
Page 168: Viewing The At-S41 Switch Information
AT-S41 User’s Guide Viewing the AT-S41 Switch Information The procedure in this section explains how to display general information about the switch. To display the switch information, perform the following procedure: 1. Click on the General Info menu tab and select Switch Info from the sub-menu.
Page 169: Ping Execution
AT-S41 User’s Guide Ping Execution To configure the ping execution settings on the switch, perform the following procedure: 1. Click on the Tools menu tab and select Ping from the sub-menu. The Ping Test Configuration page is displayed, as shown in Figure Figure 53 Ping Test Configuration Page 2.
Page 170: Figure 54 Ping Test Result Page
AT-S41 User’s Guide 4. To view the ping results, click the Show Ping Results button. The Ping Test Result page is displayed, as shown in Figure 54. Figure 54 Ping Test Result Page The parameters cannot be modified on this page. They are for informational purposes only.
Page 171: Bootstrap Configuration
AT-S41 User’s Guide Bootstrap Configuration The bootstrap feature allows you to download new software and configuration settings when you boot up the switch. To configure the bootstrap settings on the switch, perform the following procedure: 1. Click on the Tools menu tab and select Bootstrap from the sub-menu.
Page 172 AT-S41 User’s Guide Remote If you choose the remote boot load mode, the switch downloads software from a TFTP server and boots using the newly downloaded management software. Load Mode If you are using the remote boot load mode, you need to specify how the switch should download the new management software.
Page 173: Chapter 19 Port Parameters
Chapter 19 Port Parameters The procedures in this chapter allow you to view and change the parameter settings for the individual ports on a switch. Examples of port parameters that you can adjust include duplex mode and port speed. This chapter contains the following procedures: ❑...
Page 174: Configuring Port Parameters
AT-S41 User’s Guide Configuring Port Parameters To configure the parameter settings for a port on a switch, perform the following procedure: 1. Click on the Basic Config menu tab and select Port Config from the sub-menu. Choose Port Config again in the next sub-menu.
Page 175 AT-S41 User’s Guide Type The port types. Ports 1-24 are 10/100Base-TX and can operate at 10/100 Mbps. Ports 25-26 are 1000Base-TX and can operate at 10/100/1000 Mbps. Link Status The status of the link between the port and the end node connected to the port.
Page 176 AT-S41 User’s Guide Possible values are: Enabled - The port is allowed to use flow control. This is the default setting for all of the ports on the switch. Disabled - The port is not configured to use flow control.
Page 177: Configuring Gigabit Port Type
The default port type setting is twisted pair. In order to change the use of these ports from one type to the other, the port type must be changed in the AT-S41 management software. To configure a gigabit port type, perform the following procedure: 1.
Page 178: Displaying Port Status
AT-S41 User’s Guide Displaying Port Status The procedure in this section displays the operating status of the ports on a switch. To display the status of a switch port, perform the following procedure: 1. Click on the General Info menu tab and select Front Panel from the sub-menu.
Page 179: Figure 59 Configuration Of A Port
AT-S41 User’s Guide If you select a port, the Configuration of Port page is displayed, as shown in Figure 59. Figure 59 Configuration of a Port This page displays the port’s configuration and operating status. Set the port parameters as desired and click the Apply button. The parameters are described below.
Page 180 AT-S41 User’s Guide port to resume normal operation. You can also disable an unused port to secure it from unauthorized connections. Possible values are: Enabled - The port is able to send and receive Ethernet frames. This is the default setting for all of the ports on the switch.
Page 181: Displaying Port Statistics
AT-S41 User’s Guide Displaying Port Statistics The procedure in this section displays the statistics of a port on a switch. To display the statistics of a port, perform the following procedure: 1. Click on the Statistics menu tab. The Statistics page will appear, as displayed in Figure 60.
Page 182 AT-S41 User’s Guide Good Multicast Number of valid multicast packets received on the port. CRC/Align Errors Number of packets with a cyclic redundancy check (CRC) error but with the proper length (64-1518 bytes) received on the port. Undersize Packets Number of packets that were less than the minimum length specified by IEEE 802.3 (64 bytes including the CRC) received on...
Page 183: Chapter 20 Port Security
Chapter 20 Port Security This chapter explains how to configure port security. Note For background information on port security, refer to the Port Security Overview on page 59.
Page 184: Configuring Port Security
AT-S41 User’s Guide Configuring Port Security To configure the switch’s port security, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Security from the sub-menu. Choose Security Config from the next sub-menu. The Port Security page will appear, as displayed in Figure 61.
Page 185 AT-S41 User’s Guide 4. If you selected the Limit security mode, you can set a threshold or specific limit on the maximum number of dynamic MAC addresses the port can learn. The threshold is automatically set to 1 until you change it in the Threshold data entry field.
Page 186: Displaying Port Security Settings
AT-S41 User’s Guide Displaying Port Security Settings To view the switch’s port security settings, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Security from the sub-menu. Choose Security Overview from the next sub-menu.
Page 187: Chapter 21 Port Trunks
Chapter 21 Port Trunks This chapter contains the procedures for creating or deleting a port trunk using a Web browser management session. Note For background information on port trunking, refer to the Port Trunking Overview on page 66.
Page 188: Creating Or Deleting A Port Trunk
AT-S41 User’s Guide Creating or Deleting a Port Trunk Caution Do not connect the cables of a port trunk to the ports on the switch until after you have configured the ports on both the switch and the end node. Connecting the cables prior to configuring the ports can create loops in your network topology.
Page 189 AT-S41 User’s Guide 2. To create a port trunk, do the following: a. Check the ports that will make up the port trunk. A port trunk can contain up to four ports. All of the ports in a port trunk must be in the same trunk group.
Page 190: Chapter 22 Port Monitoring
Chapter 22 Port Monitoring This chapter contains the procedure for enabling and disabling port monitoring. Note For background information on port monitoring, refer to Port Monitoring Overview on page 74.
Page 191: Configuring Port Monitoring
AT-S41 User’s Guide Configuring Port Monitoring To enable or disable port monitoring, perform the following procedure: 1. Click on the Advanced Config menu tab and select Port Monitoring from the sub-menu. The Port Monitoring Configuration page will appear, as displayed in Figure 64.
Page 192: Spanning Tree Protocol
Chapter 23 Spanning Tree Protocol This chapter explains how to configure the STP bridge parameters on an AT-8326GB Fast Ethernet switch from a Web browser management session. Sections in the chapter include: ❑ Configuring a Bridge’s STP Settings on page 193 ❑...
Page 193: Configuring A Bridge's Stp Settings
AT-S41 User’s Guide Configuring a Bridge’s STP Settings Caution STP on a bridge is disabled by default. If you enable STP, the bridge provides default STP parameters that are adequate for most networks. Changing them without prior experience and an understanding of how STP works might have a negative effect on your network.
Page 194 AT-S41 User’s Guide Bridge Priority The priority number for the bridge. This number is used in determining the root bridge for STP. The bridge with the lowest priority number is selected as the root bridge. If two or more bridges have the same priority value, the bridge with the numerically lowest MAC address becomes the root bridge.
Page 195: Configuring Stp Port Settings
AT-S41 User’s Guide Configuring STP Port Settings To display and configure the STP settings, perform the following procedure: 1. Click on the Basic Config menu tab and select Spanning Tree from the sub-menu. Choose STP Port Config from the next sub-menu.
Page 196 AT-S41 User’s Guide Note Port priority cannot be set on ports that are part of a trunk group. Path Cost The spanning tree algorithm uses the cost parameter to decide which port provides the lowest cost path to the root bridge for that LAN.
Page 197: Chapter 24 Virtual Lans
Chapter 24 Virtual LANs This chapter explains how to create, modify, and delete VLANs. This chapter also explains how to change a switch’s VLAN operating mode. Note For background information on VLANs, refer to Chapter 10, Virtual LANs. This chapter contains the following sections: ❑...
Page 198: Creating A Tagged Or Untagged Vlan
AT-S41 User’s Guide Creating a Tagged or Untagged VLAN The procedure for creating a new VLAN is divided into the following phases: ❑ Phase 1: Assigning a VID and name and specifying the port members ❑ Phase 2: Converting tagged ports into untagged ports Performing Phase 1 is required whenever you create a new VLAN.
Page 199: Phase 1
AT-S41 User’s Guide Phase 1 This phase assigns a VID and a name to your VLAN and also designates the VLAN port members. 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select Create VLAN from the next sub-menu.
Page 200 AT-S41 User’s Guide If the VLAN will be unique in your network, then the name should be unique as well. If the VLAN will be part of a larger VLAN that spans multiple switches, then the name for the VLAN should be the same on each switch where nodes of the VLAN are connected.
Page 201: Phase 2
AT-S41 User’s Guide Phase 2 This phase to creating a new VLAN converts the tagged ports that you added to the new VLAN into untagged ports. This process involves changing the PVIDs of the ports so that they match the VID of the new VLAN.
Page 202 AT-S41 User’s Guide For example, if you wanted to make Port 5 an untagged port of a VLAN with a VID of 7, you would change the PVID for Port 5 to the value 7. 4. Click the Apply button.
Page 203: Viewing Or Modifying A Tagged Or Untagged Vlan
AT-S41 User’s Guide Viewing or Modifying a Tagged or Untagged VLAN There are two phases to modifying a VLAN. You might need to perform both phases or just one, depending on what it is you want to change in the VLAN. The phases are: ❑...
Page 204: Figure 70 Vlan Create/Modify (802.1Q Vlans)
AT-S41 User’s Guide The VLAN Create/Modify page will appear, as displayed in Figure Figure 70 VLAN Create/Modify (802.1Q VLANs) The rows on the page are defined below: Tagged A dot in a radio button indicates the corresponding port is a tagged member of the VLAN.
Page 205 AT-S41 User’s Guide 3. To add a tagged port to the VLAN, click the Tagged radio button of the port. Note You cannot add untagged ports to a VLAN from this window. To add untagged ports, refer to Phase 2, below.
Page 206: Phase 2
AT-S41 User’s Guide Phase 2 You must perform this phase whenever you need to add or remove an untagged port from a VLAN. This phase explains how to change the PVIDs of the ports so that they match the VID of a different VLAN. For example, if you want to assign Port 2 as an untagged member of a VLAN with a VID of 4, you must change the PVID of the port to 4.
Page 207 AT-S41 User’s Guide For example, if you wanted to make Port 5 an untagged port of a VLAN with a VID of 7, you would change the PVID for Port 5 to the value 7. 4. Click the Apply button.
Page 208: Deleting A Tagged Or Untagged Vlan
AT-S41 User’s Guide Deleting a Tagged or Untagged VLAN To delete a VLAN, perform the following procedure: 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu. Select VLAN Info from the next sub-menu. The VLAN Configuration - Members page is displayed. This window lists all the VLANs that currently exist in the stack.
Page 209: Creating A Port-Based Vlan
AT-S41 User’s Guide Creating a Port-based VLAN To create a port-based VLAN, perform the following procedure: Note This procedure assumes that the switch is set to the Port-based VLAN Type. For instructions on how to change the VLAN mode on the switch, refer to Setting the VLAN Type on page 213.
Page 210 AT-S41 User’s Guide Note The ports that you just added to the new VLAN are not removed from their current VLAN assignments. You must remove the ports manually from the other VLANs if you do not want them to be shared.
Page 211: Viewing Or Modifying A Port-Based Vlan
AT-S41 User’s Guide Viewing or Modifying a Port-based VLAN To view the configuration of a port-based VLAN or to modify a VLAN, such as to add or remove ports or to change the VLAN name, perform the following procedure: 1. Click on the Advanced Config menu tab and select VLAN Config from the sub-menu.
Page 212 AT-S41 User’s Guide The page indicates which ports in the stack are members of the VLAN. A check in a check box indicates that the port is a VLAN member. An empty box indicates that the port is not a VLAN member.
Page 213: Setting The Vlan Type
AT-S41 User’s Guide Setting the VLAN Type An AT-8326GB stack can operate in either the 802.1Q VLAN mode for creating tagged and untagged VLANs or the port-based VLAN mode. Note The VLAN Type default is 802.1Q. To change a stack’s VLAN Type, perform the following procedure: 1.
Page 214: Chapter 25 Mac Address Table
Chapter 25 MAC Address Table This chapter contains instructions on how to view the dynamic and static addresses in the MAC address table of the switch. This chapter contains the following procedure: ❑ Viewing the MAC Address by Port on page 215 ❑...
Page 215: Viewing The Mac Address By Port
AT-S41 User’s Guide Viewing the MAC Address by Port This section contains the procedure for viewing the dynamic MAC addresses that have been learned on a particular port. You can also use this procedure to view any static MAC addresses that have been assigned to a port.
Page 216: Viewing The Mac Addresses By Mac
AT-S41 User’s Guide Viewing the MAC Addresses by MAC This section contains the procedure for viewing the dynamic MAC addresses that have been learned on all ports of a switch. This procedure will also let you view all static MAC addresses that have been assigned to the ports on the switch.
Page 217 AT-S41 User’s Guide 3. To modify the aging time, enter a value in seconds in the Aging Time field and click the Apply button. The Aging Time setting is in the range of 10 to 1048 seconds. The default setting is 300 seconds.
Page 218: Viewing The Mac Addresses Of A Vlan
AT-S41 User’s Guide Viewing the MAC Addresses of a VLAN The procedure in this section can be useful if you created VLANs on the switch and want to view the MAC addresses of the end nodes of a particular VLAN. (This procedure is not of much value if the switch...
Page 219 AT-S41 User’s Guide 2. Enter the VLAN ID whose static and dynamic MAC addresses you want to view into the VLAN ID field. 3. Click the Apply button next to the VLAN ID field. The management software displays the MAC addresses of the nodes of all ports in the VLAN.
Page 220: Adding Static Mac Addresses
AT-S41 User’s Guide Adding Static MAC Addresses The management software allows you to assign up to 256 static MAC addresses on an AT-8326GB switch. To add a static address to the MAC address table, perform the following procedure: 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu.
Page 221: Deleting Static Mac Addresses
AT-S41 User’s Guide Deleting Static MAC Addresses To delete a static MAC address, perform the following procedure: 1. Click on the Basic Config menu tab and select Forwarding DB from the sub-menu. Choose Static FDB from the next sub-menu. The Static MAC Address Configuration window will appear, as displayed in Figure 79.
Page 222: Chapter 26 Quality Of Service
Chapter 26 Quality of Service This chapter contains instructions on how to configure QoS. This chapter contains the following procedure: ❑ Configuring QoS on page 223 Note For background information on QoS, refer to Quality of Service Overview on page 127.
Page 223: Configuring Qos
AT-S41 User’s Guide Configuring QoS Note Quality of Service is not supported in port-based VLAN mode. To configure QoS, perform the following procedure: 1. Click on the Advanced Config menu tab and select Quality of Service from the sub-menu. The Quality of Service page will appear, as displayed in Figure 80.
Page 224 AT-S41 User’s Guide Note The tagged information in a frame is not changed as the frame traverses the switch. A tagged frame exits the switch with the same priority level that it had when it entered.
Page 225: Chapter 27 Igmp Snooping
Chapter 27 IGMP Snooping This chapter explains how to activate and configure the IGMP snooping feature on the switch. Sections in the chapter include: ❑ Activating IGMP Snooping on page 226 ❑ Viewing Group Members on page 228 Note For background information on this feature, refer to IGMP Snooping on page 130.
Page 226: Activating Igmp Snooping
AT-S41 User’s Guide Activating IGMP Snooping To enable or disable IGMP snooping on the switch and to configure IGMP snooping parameters, perform the following procedure: 1. Click on the Advanced Config menu tab and select IGMP Snooping from the sub-menu.
Page 227 AT-S41 User’s Guide The VLAN ID of the VLAN the multicast group belongs to. This parameter will only be visible if you have created a VLAN. Multicast Group Address The multicast address of the group. To view the members of the multicast group, click on the...
Page 228: Viewing Group Members
AT-S41 User’s Guide Viewing Group Members You can use the AT-S41 software to display a list of the members of each multicast group on a switch. To display the list, perform the following procedure: 1. Click on the Advanced Config menu tab and select IGMP Snooping from the sub-menu.
Page 229: Broadcast Storm Control
Chapter 28 Broadcast Storm Control This chapter contains instructions on how to configure the broadcast storm control feature on the switch. Note For background information on this feature, refer to Broadcast Storm Control on page 136.
Page 230: Activating Broadcast Storm Control And Setting A Threshold
AT-S41 User’s Guide Activating Broadcast Storm Control and Setting a Threshold To activate broadcast storm control and set a threshold, perform the following procedure: 1. Click on the Advanced Config menu tab and select Storm Control from the sub-menu. The Broadcast Storm Control page will appear, as displayed in Figure 83.
Page 231: Management Software Updates
Chapter 29 Management Software Updates This chapter explains how to obtain new versions of the AT-S41 management software and how to download the software onto an AT-8326GB switch from a Web browser management session. You can download new management software onto a switch using the...
Page 232: Obtaining Software Updates
AT-S41 User’s Guide Obtaining Software Updates New releases of the AT-S41 management software are available from the Allied Telesyn Web site at www.alliedtelesyn.com and from our FTP server at ftp.alliedtelesyn.com. To log on to the FTP server, enter “anonymous” for the user name and your e-mail address for the password.
Page 233: Downloading A New Management Software Image Using Tftp
To download the new AT-S41 software image onto your AT-8326GB switch, perform the following procedure: 1. Establish a Web management session on the switch where you intend to download the new management software.
Page 234 AT-S41 User’s Guide The parameters on the Image Upgrade page are defined below: Image Version/Date The software version and date currently on the switch. File Type ❑ Image An image file is the management software for the switch. ❑ Configuration A configuration file is a file that contains all of the existing configurations and settings for a switch.
Page 235: At-S41 Default Settings
Appendix A AT-S41 Default Settings This appendix lists the AT-S41 factory default settings. Setting Default IP Address 0.0.0.0 Subnet Mask 0.0.0.0 Gateway Address 0.0.0.0 DHCP Disabled IGMP Snooping Disabled System Name None MAC Aging Time 300 seconds Spanning Tree Protocol...
Page 236 AT-S41 User’s Guide Setting Default Port Trunking Disabled Ports 25 and 26 Port Type (GBIC or Twisted Pair) Twisted Pair VLANs Port-based and Tagged VLANs Enabled Default VLAN Name Default VLAN (all ports) RS-232 Terminal Port Emulation Mode VT100 Data Bits...

Allied Telesis AT-S41 User Manual

Table of Contents

List of Figures

Preface

Section I

Overview

Chapter 1 Management Software Overview

Chapter 2 Stacking

Local and Telnet Management

Chapter 3

Starting a Local or Telnet Management Session

Chapter 4 Basic Switch Parameters

When Does an AT-8326GB Switch Need an IP Address

Configuring an IP Address

Configuring System Administration Information

Setting the User Interface Configuration

Activating DHCP

Configuring SNMP Community Strings and Trap IP Addresses

Rebooting a Switch

Viewing the AT-S41 Switch Information

Ping Execution

Bootstrap Configuration

Chapter 5 Port Parameters

Chapter 6 Port Security

Chapter 7 Port Trunking

Chapter 8 Port Monitoring

Chapter 9 Spanning Tree Protocol

Chapter 10 Virtual Lans

VLAN Overview

Tagged and Untagged VLAN Overview

Creating a Tagged or Untagged VLAN

Deleting a Tagged or Untagged VLAN

Port-Based VLAN Mode Overview

Creating a Port-Based VLAN

Modifying a Port-Based VLAN

Setting GVRP Status

Resetting the VLAN Parameters to Default

Setting the VLAN Type

Chapter 11 MAC Address Table

MAC Address Overview

Displaying MAC Addresses

Viewing MAC Addresses by Port

Viewing the MAC Addresses by MAC

Viewing the MAC Addresses of a VLAN

Adding Static MAC Addresses

Deleting Static MAC Addresses

Changing the Aging Time

Chapter 12 Quality of Service

Chapter 13 IGMP Snooping

Chapter 14 Broadcast Storm Control

Chapter 15 Port Statistics

Chapter 16

Management Software Updates

Web Browser Management

Chapter 17

Starting a Web Browser Management Session

Chapter 18, Basic Switch Parameters

Basic Switch Parameters

Chapter 19 Port Parameters

Chapter 20 Port Security

Chapter 21 Port Trunks

Chapter 22 Port Monitoring

Chapter 23, Spanning Tree Protocol

Spanning Tree Protocol

Chapter 24 Virtual Lans

Creating a Tagged or Untagged VLAN

Deleting a Tagged or Untagged VLAN

Creating a Port-Based VLAN

Viewing or Modifying a Port-Based VLAN

Setting the VLAN Type

Chapter 25 MAC Address Table

Viewing the MAC Address by Port

Viewing the MAC Addresses by MAC

Viewing the MAC Addresses of a VLAN

Adding Static MAC Addresses

Deleting Static MAC Addresses

Chapter 26 Quality of Service

Chapter 27 IGMP Snooping

Chapter 28, Broadcast Storm Control

Broadcast Storm Control