Configuration Guide
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Catalyst 2950 Desktop Switch Software Configuration Guide Cisco IOS Release 12.1(6)EA2b March, 2002 Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Customer Order Number: DOC-7811380= Text Part Number: 78-11380-03
Catalyst 2950 Desktop Switch Software Configuration Guide Cisco IOS Release 12.1(6)EA2b March, 2002 Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Customer Order Number: DOC-7811380= Text Part Number: 78-11380-03
Configuration Guide
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... Using CMS and Clustering Switches 1-7 Network Configuration Examples 1-8 Design Concepts for Using the Switch 1-8 Small to Medium-Sized Network Configuration 1-10 Collapsed Backbone and Switch Cluster Configuration 1-12 Large Campus Configuration 1-13 Getting Started with CMS 2-1 Features 2-2 Front Panel View 2-4 Cluster Tree 2-5 Front-Panel Images 2-6 Redundant Power System LED 2-7 Catalyst 2950 Desktop Switch Software Configuration Guide...
... Using CMS and Clustering Switches 1-7 Network Configuration Examples 1-8 Design Concepts for Using the Switch 1-8 Small to Medium-Sized Network Configuration 1-10 Collapsed Backbone and Switch Cluster Configuration 1-12 Large Campus Configuration 1-13 Getting Started with CMS 2-1 Features 2-2 Front Panel View 2-4 Cluster Tree 2-5 Front-Panel Images 2-6 Redundant Power System LED 2-7 Catalyst 2950 Desktop Switch Software Configuration Guide...
Configuration Guide
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Contents Port Modes and LEDs 2-8 VLAN Membership Modes 2-9 Topology View 2-10 Topology Icons 2-12 Device and Link Labels 2-13 Colors in the Topology View 2-14 Topology Display Options 2-14 Menus and Toolbar 2-15 Menu Bar 2-15 Toolbar 2-20 Front ... Verifying Your Changes 2-32 Change Notification 2-32 Error Checking 2-32 Saving Your Changes 2-32 Using Different Versions of CMS 2-33 Where to Go Next 2-33 Catalyst 2950 Desktop Switch Software Configuration Guide iv 78-11380-03
Contents Port Modes and LEDs 2-8 VLAN Membership Modes 2-9 Topology View 2-10 Topology Icons 2-12 Device and Link Labels 2-13 Colors in the Topology View 2-14 Topology Display Options 2-14 Menus and Toolbar 2-15 Menu Bar 2-15 Toolbar 2-20 Front ... Verifying Your Changes 2-32 Change Notification 2-32 Error Checking 2-32 Saving Your Changes 2-32 Using Different Versions of CMS 2-33 Where to Go Next 2-33 Catalyst 2950 Desktop Switch Software Configuration Guide iv 78-11380-03
Configuration Guide
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... through Different Management VLANs 5-8 Discovery of Newly Installed Switches 5-9 HSRP and Standby Command Switches 5-10 Virtual IP Addresses 5-11 Automatic Recovery of Cluster Configuration 5-11 Considerations for Cluster Standby Groups 5-12 IP Addresses 5-13 Host Names 5-14 Passwords 5-14... Availability of Switch-Specific Features in Switch Clusters 5-16 Creating a Switch Cluster 5-16 Enabling a Command Switch 5-17 Adding Member Switches 5-18 Creating a Cluster Standby Group 5-20 Verifying a Switch Cluster 5-22 Using the CLI to Manage Switch Clusters 5-23 Catalyst 1900 and Catalyst 2820 CLI...
... through Different Management VLANs 5-8 Discovery of Newly Installed Switches 5-9 HSRP and Standby Command Switches 5-10 Virtual IP Addresses 5-11 Automatic Recovery of Cluster Configuration 5-11 Considerations for Cluster Standby Groups 5-12 IP Addresses 5-13 Host Names 5-14 Passwords 5-14... Availability of Switch-Specific Features in Switch Clusters 5-16 Creating a Switch Cluster 5-16 Enabling a Command Switch 5-17 Adding Member Switches 5-18 Creating a Cluster Standby Group 5-20 Verifying a Switch Cluster 5-22 Using the CLI to Manage Switch Clusters 5-23 Catalyst 1900 and Catalyst 2820 CLI...
Configuration Guide
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... Protocol 6-11 Configuring the Switch as an NTP Client 6-11 Enabling NTP Authentication 6-11 Configuring the Switch for NTP Broadcast-Client Mode 6-12 Configuring SNMP 6-12 Disabling and Enabling SNMP 6-12 Entering Community Strings 6-12 Adding Trap Managers 6-12 Configuring CDP 6-13 Configuring ...Specifying TACACS+ Authorization for Privileged EXEC Access and Network Services 6-22 Starting TACACS+ Accounting 6-22 Configuring a Switch for Local AAA 6-23 Controlling Switch Access with RADIUS 6-24 Understanding RADIUS 6-24 RADIUS Operation 6-25 Configuring RADIUS 6-26 Default RADIUS Configuration ...
... Protocol 6-11 Configuring the Switch as an NTP Client 6-11 Enabling NTP Authentication 6-11 Configuring the Switch for NTP Broadcast-Client Mode 6-12 Configuring SNMP 6-12 Disabling and Enabling SNMP 6-12 Entering Community Strings 6-12 Adding Trap Managers 6-12 Configuring CDP 6-13 Configuring ...Specifying TACACS+ Authorization for Privileged EXEC Access and Network Services 6-22 Starting TACACS+ Accounting 6-22 Configuring a Switch for Local AAA 6-23 Controlling Switch Access with RADIUS 6-24 Understanding RADIUS 6-24 RADIUS Operation 6-25 Configuring RADIUS 6-26 Default RADIUS Configuration ...
Configuration Guide
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... Re-Authenticating a Client Connected to a Port 7-11 Changing the Quiet Period 7-11 Changing the Switch-to-Client Retransmission Time 7-12 Setting the Switch-to-Client Frame-Retransmission Number 7-13 Enabling Multiple Hosts 7-13 Resetting the 802.1X Configuration to ...for a New Switch 8-3 Changing the Management VLAN Through a Telnet Connection 8-4 Assigning VLAN Port Membership Modes 8-4 VLAN Membership Combinations 8-6 Assigning Static-Access Ports to a VLAN 8-7 Using VTP 8-7 The VTP Domain 8-7 VTP Modes and Mode Transitions 8-7 Catalyst 2950 Desktop Switch Software Configuration Guide...
... Re-Authenticating a Client Connected to a Port 7-11 Changing the Quiet Period 7-11 Changing the Switch-to-Client Retransmission Time 7-12 Setting the Switch-to-Client Frame-Retransmission Number 7-13 Enabling Multiple Hosts 7-13 Resetting the 802.1X Configuration to ...for a New Switch 8-3 Changing the Management VLAN Through a Telnet Connection 8-4 Assigning VLAN Port Membership Modes 8-4 VLAN Membership Combinations 8-6 Assigning Static-Access Ports to a VLAN 8-7 Using VTP 8-7 The VTP Domain 8-7 VTP Modes and Mode Transitions 8-7 Catalyst 2950 Desktop Switch Software Configuration Guide...
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... 8-10 Domain Names 8-10 Passwords 8-10 Upgrading from Previous Software Releases 8-11 VTP Version 8-11 Default VTP Configuration 8-11 Configuring VTP 8-12 Configuring VTP Server Mode 8-12 Configuring VTP Client Mode 8-12 Disabling VTP (VTP Transparent Mode) 8-13 Enabling VTP Version 2 8-14 Disabling VTP Version 2 8-14 Enabling VTP Pruning 8-15 Monitoring VTP 8-15... Using STP Port Priorities 8-25 Configuring STP Port Priorities and Load Sharing 8-25 Load Sharing Using STP Path Cost 8-27 How the VMPS Works 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide ix
... 8-10 Domain Names 8-10 Passwords 8-10 Upgrading from Previous Software Releases 8-11 VTP Version 8-11 Default VTP Configuration 8-11 Configuring VTP 8-12 Configuring VTP Server Mode 8-12 Configuring VTP Client Mode 8-12 Disabling VTP (VTP Transparent Mode) 8-13 Enabling VTP Version 2 8-14 Disabling VTP Version 2 8-14 Enabling VTP Pruning 8-15 Monitoring VTP 8-15... Using STP Port Priorities 8-25 Configuring STP Port Priorities and Load Sharing 8-25 Load Sharing Using STP Path Cost 8-27 How the VMPS Works 8-28 Catalyst 2950 Desktop Switch Software Configuration Guide ix
Configuration Guide
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...Port VLAN Membership Configuration Example 8-34 Configuring STP 9-1 Understanding Basic STP Features 9-1 Supported STP Instances 9-2 STP Overview 9-2 Election of the Root Switch 9-3 Bridge Protocol Data Units 9-3 STP Timers 9-4 Creating the STP Topology 9-4 STP Interface States 9-5 Blocking State 9-6 Listening State 9-7 Learning State...Understanding Port Fast 9-10 Understanding BPDU Guard 9-10 Understanding UplinkFast 9-11 Understanding Cross-Stack UplinkFast 9-12 How CSUF Works 9-13 Events that Cause Fast Convergence 9-14 Catalyst 2950 Desktop Switch Software Configuration Guide x 78-11380-03
...Port VLAN Membership Configuration Example 8-34 Configuring STP 9-1 Understanding Basic STP Features 9-1 Supported STP Instances 9-2 STP Overview 9-2 Election of the Root Switch 9-3 Bridge Protocol Data Units 9-3 STP Timers 9-4 Creating the STP Topology 9-4 STP Interface States 9-5 Blocking State 9-6 Listening State 9-7 Learning State...Understanding Port Fast 9-10 Understanding BPDU Guard 9-10 Understanding UplinkFast 9-11 Understanding Cross-Stack UplinkFast 9-12 How CSUF Works 9-13 Events that Cause Fast Convergence 9-14 Catalyst 2950 Desktop Switch Software Configuration Guide x 78-11380-03
Configuration Guide
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...Protocol 10-10 PAgP Modes 10-10 Physical Learners and Aggregate-Port Learners 10-11 PAgP Interaction with Other Features 10-12 Understanding Load Balancing and Forwarding Methods 10-12 Default EtherChannel Configuration 10-13 EtherChannel Configuration Guidelines 10-14 Configuring EtherChannels 10-14 Configuring EtherChannel Load Balancing 10-16 ... Setting the Snooping Method 11-4 Joining a Multicast Group 11-4 Statically Configuring a Host to Join a Group 11-5 CLI: Statically Configuring a Interface to Join a Group 11-6 Catalyst 2950 Desktop Switch Software Configuration Guide xii 78-11380-03
...Protocol 10-10 PAgP Modes 10-10 Physical Learners and Aggregate-Port Learners 10-11 PAgP Interaction with Other Features 10-12 Understanding Load Balancing and Forwarding Methods 10-12 Default EtherChannel Configuration 10-13 EtherChannel Configuration Guidelines 10-14 Configuring EtherChannels 10-14 Configuring EtherChannel Load Balancing 10-16 ... Setting the Snooping Method 11-4 Joining a Multicast Group 11-4 Statically Configuring a Host to Join a Group 11-5 CLI: Statically Configuring a Interface to Join a Group 11-6 Catalyst 2950 Desktop Switch Software Configuration Guide xii 78-11380-03
Configuration Guide
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... Security with ACLs 12-1 Understanding ACLs 12-1 ACLs 12-2 Handling Fragmented and Unfragmented Traffic 12-3 Understanding Access Control Parameters 12-4 Guidelines for Configuring ACLs on the Catalyst 2950 Switches 12-5 Configuring ACLs 12-6 Unsupported Features 12-6 Creating Standard and Extended IP ACLs 12-7 ACL Numbers 12-7 Creating a Numbered Standard ACL 12-8 Creating a Numbered Extended ACL 12-9 Creating Named Standard and Extended ACLs 12-12 Including Comments...
... Security with ACLs 12-1 Understanding ACLs 12-1 ACLs 12-2 Handling Fragmented and Unfragmented Traffic 12-3 Understanding Access Control Parameters 12-4 Guidelines for Configuring ACLs on the Catalyst 2950 Switches 12-5 Configuring ACLs 12-6 Unsupported Features 12-6 Creating Standard and Extended IP ACLs 12-7 ACL Numbers 12-7 Creating a Numbered Standard ACL 12-8 Creating a Numbered Extended ACL 12-9 Creating Named Standard and Extended ACLs 12-12 Including Comments...
Configuration Guide
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...Enabling Debugging on a Specific Feature 14-11 Enabling All-System Diagnostics 14-12 Redirecting Debug and Error Message Output 14-12 Error Messages for Security and QoS Configurations A-1 System Messages B-1 How ...to Read System Messages B-1 Error Message Traceback Reports B-3 Error Messages and Recovery Procedures B-3 Chassis Message B-3 CMP Messages B-3 Environment Messages B-4 GigaStack Messages B-4 Link Message B-5 RTD Messages B-5 Storm Control Messages B-6 Contents 78-11380-03 Catalyst 2950 Desktop Switch...
...Enabling Debugging on a Specific Feature 14-11 Enabling All-System Diagnostics 14-12 Redirecting Debug and Error Message Output 14-12 Error Messages for Security and QoS Configurations A-1 System Messages B-1 How ...to Read System Messages B-1 Error Message Traceback Reports B-3 Error Messages and Recovery Procedures B-3 Chassis Message B-3 CMP Messages B-3 Environment Messages B-4 GigaStack Messages B-4 Link Message B-5 RTD Messages B-5 Storm Control Messages B-6 Contents 78-11380-03 Catalyst 2950 Desktop Switch...
Configuration Guide
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... using the setup program described in the release notes. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xvii The enhanced software image supports these switches: • Catalyst 2950C-24 • Catalyst 2950G-12-EI • Catalyst 2950G-24-EI • Catalyst 2950G-24-EI-DC • Catalyst 2950G-48-EI • Catalyst 2950T-24 The standard software image supports these topics: • Requirements...
... using the setup program described in the release notes. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xvii The enhanced software image supports these switches: • Catalyst 2950C-24 • Catalyst 2950G-12-EI • Catalyst 2950G-24-EI • Catalyst 2950G-24-EI-DC • Catalyst 2950G-48-EI • Catalyst 2950T-24 The standard software image supports these topics: • Requirements...
Configuration Guide
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.... Chapter 7, "Configuring 802.1X Port-Based Authentication," provides the considerations and CLI procedures for configuring switch-wide settings. xviii Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 On the Cisco Product Documentation home page, select Release 12.1 from the Cisco.com home page at Service and Support > Technical Documents. Chapter 2, "Getting Started with CMS...
.... Chapter 7, "Configuring 802.1X Port-Based Authentication," provides the considerations and CLI procedures for configuring switch-wide settings. xviii Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 On the Cisco Product Documentation home page, select Release 12.1 from the Cisco.com home page at Service and Support > Technical Documents. Chapter 2, "Getting Started with CMS...
Configuration Guide
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... quality of traffic. The online help provides the CMS procedures. With this manual. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xix Appendix B, "System Messages," lists the IOS system messages for configuring basic and... advanced spanning-tree features. The online help provides the CMS procedures. Appendix A, "Error Messages for Security and QoS Configurations" lists the CLI error messages for configuring QoS. Chapter 12...
... quality of traffic. The online help provides the CMS procedures. With this manual. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide xix Appendix B, "System Messages," lists the IOS system messages for configuring basic and... advanced spanning-tree features. The online help provides the CMS procedures. Appendix A, "Error Messages for Security and QoS Configurations" lists the CLI error messages for configuring QoS. Chapter 12...
Configuration Guide
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... available for the Catalyst 2950 Cisco IOS Release 12.1(6)EA2b. It also includes references to where you have the enhanced software image installed on your switch. Overview CH A P T E R 1 This chapter provides these topics about each feature. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide...the "Purpose" section on page 4-7 lists the defaults for a list of the Catalyst 2950 switches in different network topologies Features The Catalyst 2950 software supports the switches listed in this software image. Note Some features require that you can find additional ...
... available for the Catalyst 2950 Cisco IOS Release 12.1(6)EA2b. It also includes references to where you have the enhanced software image installed on your switch. Overview CH A P T E R 1 This chapter provides these topics about each feature. 78-11380-03 Catalyst 2950 Desktop Switch Software Configuration Guide...the "Purpose" section on page 4-7 lists the defaults for a list of the Catalyst 2950 switches in different network topologies Features The Catalyst 2950 software supports the switches listed in this software image. Note Some features require that you can find additional ...
Configuration Guide
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... BackboneFast for fast convergence after a spanning-tree topology change from becoming the STP root Note A Catalyst 2950 switch can support up to be used Catalyst 2950 Desktop Switch Software Configuration Guide 1-4 78-11380-03 Note The Catalyst 2950-12 and Catalyst 2950-24 switches support only 64 port-based VLANs. • IEEE 802.1Q trunking protocol on a link...
... BackboneFast for fast convergence after a spanning-tree topology change from becoming the STP root Note A Catalyst 2950 switch can support up to be used Catalyst 2950 Desktop Switch Software Configuration Guide 1-4 78-11380-03 Note The Catalyst 2950-12 and Catalyst 2950-24 switches support only 64 port-based VLANs. • IEEE 802.1Q trunking protocol on a link...
Configuration Guide
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... Users with RJ-45 connectors-to the 10/100 inline-power ports on the Catalyst 3524-PWR XL switches and to the 10/100 ports on the Catalyst 3524-PWR XL switches provides -48 VDC power to the network resources (such as shown, or into well-defined ... the Cisco IP Phone. You can use a Catalyst 3550-12T-L3 switch, as security and easier maintenance. Cisco CallManager controls call -processing server running Cisco SoftPhone software can place, receive, and control calls from an AC power source. 1-12 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Cisco IP ...
... Users with RJ-45 connectors-to the 10/100 inline-power ports on the Catalyst 3524-PWR XL switches and to the 10/100 ports on the Catalyst 3524-PWR XL switches provides -48 VDC power to the network resources (such as shown, or into well-defined ... the Cisco IP Phone. You can use a Catalyst 3550-12T-L3 switch, as security and easier maintenance. Cisco CallManager controls call -processing server running Cisco SoftPhone software can place, receive, and control calls from an AC power source. 1-12 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 Cisco IP ...
Configuration Guide
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... then highlighted. To select a device, click the icon. To select a link, click the link that you want to select. 2-12 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 To select multiple links, press the Ctrl key, and click the links that you want to select... Customer premises equipment (CPE) devices that are connected to Long-Reach Ethernet (LRE) switches • Devices that are not eligible to join the cluster, such as Cisco IP phones, Cisco access points, and Cisco Discovery Protocol (CDP)-capable hubs and routers • Devices that are identified as unknown ...
... then highlighted. To select a device, click the icon. To select a link, click the link that you want to select. 2-12 Catalyst 2950 Desktop Switch Software Configuration Guide 78-11380-03 To select multiple links, press the Ctrl key, and click the links that you want to select... Customer premises equipment (CPE) devices that are connected to Long-Reach Ethernet (LRE) switches • Devices that are not eligible to join the cluster, such as Cisco IP phones, Cisco access points, and Cisco Discovery Protocol (CDP)-capable hubs and routers • Devices that are identified as unknown ...
Configuration Guide
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... or earlier For more information about this limitation, refer to these member switches, some configuration windows for a switch. Catalyst 1900 and Catalyst 2820 - Configure the Hypertext Transfer Protocol (HTTP) port. Save the configuration for the cluster or a switch. Catalyst 3550 member switches running Cisco IOS Release 12.0(5)WC2 or earlier - Display the device Address Resolution Protocol (ARP) table, and...
... or earlier For more information about this limitation, refer to these member switches, some configuration windows for a switch. Catalyst 1900 and Catalyst 2820 - Configure the Hypertext Transfer Protocol (HTTP) port. Save the configuration for the cluster or a switch. Catalyst 3550 member switches running Cisco IOS Release 12.0(5)WC2 or earlier - Display the device Address Resolution Protocol (ARP) table, and...
Configuration Guide
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... a port to VLANs, and configure 802.1Q trunks. Display graphs that plot the total bandwidth in a cluster where the command switch is available on a switch. This option is a Catalyst 2950 switch running Cisco IOS Release 12.1(6)EA2 or later. Display port statistics. Display the link report for ACL and QoS policy maps.6 Display the most recent...
... a port to VLANs, and configure 802.1Q trunks. Display graphs that plot the total bandwidth in a cluster where the command switch is available on a switch. This option is a Catalyst 2950 switch running Cisco IOS Release 12.1(6)EA2 or later. Display port statistics. Display the link report for ACL and QoS policy maps.6 Display the most recent...