Software Configuration Guide
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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide Cisco IOS Release 12.1(20)EA2 May 2004 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: 78-11380-10
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide Cisco IOS Release 12.1(20)EA2 May 2004 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: 78-11380-10
Software Configuration Guide
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... FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. All other trademarks mentioned in the United States and certain other company. (0403R) Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide Copyright © 2001-2004 Cisco Systems, Inc. The use of the UNIX operating system. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE...
... FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. All other trademarks mentioned in the United States and certain other company. (0403R) Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide Copyright © 2001-2004 Cisco Systems, Inc. The use of the UNIX operating system. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE...
Software Configuration Guide
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... Design Concepts for Using the Switch 1-10 Small to Medium-Sized Network Configuration 1-13 Collapsed Backbone and Switch Cluster Configuration 1-14 Hotel Network Configuration 1-15 Service-Provider Central-Office Configuration 1-18 Large Campus Configuration 1-19 Multidwelling Network Using Catalyst 2950 Switches 1-20 Long-Distance, High-Bandwidth Transport Configuration 1-22 Where to Go Next 1-22 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide iii
... Design Concepts for Using the Switch 1-10 Small to Medium-Sized Network Configuration 1-13 Collapsed Backbone and Switch Cluster Configuration 1-14 Hotel Network Configuration 1-15 Service-Provider Central-Office Configuration 1-18 Large Campus Configuration 1-19 Multidwelling Network Using Catalyst 2950 Switches 1-20 Long-Distance, High-Bandwidth Transport Configuration 1-22 Where to Go Next 1-22 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide iii
Software Configuration Guide
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... E R Using the Command-Line Interface 2-1 Cisco IOS Command Modes 2-1 Getting Help 2-3 Abbreviating ...Switch Alarm Configuration 3-4 Configuring the Power Supply Alarm 3-5 Setting the Power Mode 3-5 Setting the Power Supply Alarm Options 3-5 Configuring the Switch Temperature Alarms 3-6 Setting a Secondary Temperature Threshold for the Switch 3-6 Associating the Temperature Alarms to a Relay 3-7 Configuring the FCS Bit Error Rate Alarm 3-7 Setting the FCS Error Threshold 3-8 Setting the FCS Error Hysteresis Threshold 3-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
... E R Using the Command-Line Interface 2-1 Cisco IOS Command Modes 2-1 Getting Help 2-3 Abbreviating ...Switch Alarm Configuration 3-4 Configuring the Power Supply Alarm 3-5 Setting the Power Mode 3-5 Setting the Power Supply Alarm Options 3-5 Configuring the Switch Temperature Alarms 3-6 Setting a Secondary Temperature Threshold for the Switch 3-6 Associating the Temperature Alarms to a Relay 3-7 Configuring the FCS Bit Error Rate Alarm 3-7 Setting the FCS Error Threshold 3-8 Setting the FCS Error Hysteresis Threshold 3-8 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
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... 4-8 CMS Plug-In 4-9 Cross-Platform Considerations 4-9 HTTP Access to CMS 4-9 Specifying an HTTP Port (Nondefault Configuration Only) 4-10 Configuring an Authentication Method (Nondefault Configuration Only) 4-10 Displaying CMS 4-10 Launching CMS 4-10 Front Panel View 4-13 Topology View 4-14 CMS Icons 4-15 Where to Go Next 4-15 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide v
... 4-8 CMS Plug-In 4-9 Cross-Platform Considerations 4-9 HTTP Access to CMS 4-9 Specifying an HTTP Port (Nondefault Configuration Only) 4-10 Configuring an Authentication Method (Nondefault Configuration Only) 4-10 Displaying CMS 4-10 Launching CMS 4-10 Front Panel View 4-13 Topology View 4-14 CMS Icons 4-15 Where to Go Next 4-15 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide v
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... 5-16 Displaying Scheduled Reload Information 5-17 Configuring IE2100 CNS Agents 6-1 Understanding IE2100 Series Configuration Registrar Software 6-1 CNS Configuration Service 6-2 CNS Event Service 6-3 NameSpace Mapper 6-3 What You Should Know About ConfigID, DeviceID, and Host Name 6-3 ConfigID 6-3 DeviceID 6-4 Host Name and DeviceID 6-4 Using Host Name, DeviceID, and ConfigID 6-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide vi 78-11380-10
... 5-16 Displaying Scheduled Reload Information 5-17 Configuring IE2100 CNS Agents 6-1 Understanding IE2100 Series Configuration Registrar Software 6-1 CNS Configuration Service 6-2 CNS Event Service 6-3 NameSpace Mapper 6-3 What You Should Know About ConfigID, DeviceID, and Host Name 6-3 ConfigID 6-3 DeviceID 6-4 Host Name and DeviceID 6-4 Using Host Name, DeviceID, and ConfigID 6-4 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide vi 78-11380-10
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... Cluster Standby Groups 7-12 Automatic Recovery of Cluster Configuration 7-14 IP Addresses 7-14 Host Names 7-15 Passwords 7-15 SNMP Community Strings 7-15 TACACS+ and RADIUS 7-16 Access Modes in CMS 7-16 Management VLAN 7-16 LRE Profiles 7-17 Availability of Switch-Specific Features in Switch Clusters 7-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide vii
... Cluster Standby Groups 7-12 Automatic Recovery of Cluster Configuration 7-14 IP Addresses 7-14 Host Names 7-15 Passwords 7-15 SNMP Community Strings 7-15 TACACS+ and RADIUS 7-16 Access Modes in CMS 7-16 Management VLAN 7-16 LRE Profiles 7-17 Availability of Switch-Specific Features in Switch Clusters 7-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide vii
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... 8-16 Default System Name and Prompt Configuration 8-16 Configuring a System Name 8-16 Configuring a System Prompt 8-17 Understanding DNS 8-17 Default DNS Configuration 8-18 Setting Up DNS 8-18 Displaying the DNS Configuration 8-19 Creating a Banner 8-19 Default Banner Configuration 8-19 Configuring a Message-of-the-Day Login Banner 8-20 Configuring a Login Banner 8-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide viii 78-11380-10
... 8-16 Default System Name and Prompt Configuration 8-16 Configuring a System Name 8-16 Configuring a System Prompt 8-17 Understanding DNS 8-17 Default DNS Configuration 8-18 Setting Up DNS 8-18 Displaying the DNS Configuration 8-19 Creating a Banner 8-19 Default Banner Configuration 8-19 Configuring a Message-of-the-Day Login Banner 8-20 Configuring a Login Banner 8-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide viii 78-11380-10
Software Configuration Guide
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... the TACACS+ Server Host and Setting the Authentication Key 9-13 Configuring TACACS+ Login Authentication 9-14 Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 9-16 Starting TACACS+ Accounting 9-17 Displaying the TACACS+ Configuration 9-17 Controlling Switch Access with RADIUS 9-18 Understanding RADIUS 9-18 RADIUS Operation 9-19 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide ix
... the TACACS+ Server Host and Setting the Authentication Key 9-13 Configuring TACACS+ Login Authentication 9-14 Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 9-16 Starting TACACS+ Accounting 9-17 Displaying the TACACS+ Configuration 9-17 Controlling Switch Access with RADIUS 9-18 Understanding RADIUS 9-18 RADIUS Operation 9-19 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide ix
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... Voice VLAN Ports 10-7 Using 802.1x with VLAN Assignment 10-7 Using 802.1x with Guest VLAN 10-8 Configuring 802.1x Authentication 10-9 Default 802.1x Configuration 10-9 802.1x Configuration Guidelines 10-10 Upgrading from a Previous Software Release 10-11 Enabling 802.1x Authentication 10-11 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide x 78-11380-10
... Voice VLAN Ports 10-7 Using 802.1x with VLAN Assignment 10-7 Using 802.1x with Guest VLAN 10-8 Configuring 802.1x Authentication 10-9 Default 802.1x Configuration 10-9 802.1x Configuration Guidelines 10-10 Upgrading from a Previous Software Release 10-11 Enabling 802.1x Authentication 10-11 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide x 78-11380-10
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... 11-10 Setting the Interface Speed and Duplex Parameters on a Non-LRE Switch Port 11-12 Setting the Interface Speed and Duplex Parameters on an LRE Switch Port 11-12 Configuring Media Types for Gigabit Ethernet Interfaces on LRE Switches 11-13 Configuring IEEE 802.3z Flow Control on Gigabit Ethernet Ports 11-13 Adding... Interface and Controller Status 11-15 Clearing and Resetting Interfaces and Counters 11-16 Shutting Down and Restarting the Interface 11-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xi
... 11-10 Setting the Interface Speed and Duplex Parameters on a Non-LRE Switch Port 11-12 Setting the Interface Speed and Duplex Parameters on an LRE Switch Port 11-12 Configuring Media Types for Gigabit Ethernet Interfaces on LRE Switches 11-13 Configuring IEEE 802.3z Flow Control on Gigabit Ethernet Ports 11-13 Adding... Interface and Controller Status 11-15 Clearing and Resetting Interfaces and Counters 11-16 Shutting Down and Restarting the Interface 11-17 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xi
Software Configuration Guide
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...Links 13-9 Guidelines for Using LRE Profiles 13-10 CPE Ethernet Link Guidelines 13-11 Guidelines for Configuring Cisco 575 LRE CPEs and 576 LRE 997 CPEs 13-11 Guidelines for Configuring Cisco 585 LRE CPEs 13-12 Assigning a Global Profile to All LRE Ports 13-12 Assigning a ... 13-14 Precedence 13-15 Profile Locking 13-15 Link Qualification and SNR Margins 13-16 Configuring LRE Link Persistence 13-19 Configuring LRE Link Monitor 13-20 Configuring LRE Interleave 13-20 Configuring Upstream Power Back-Off 13-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xii 78-11380-10
...Links 13-9 Guidelines for Using LRE Profiles 13-10 CPE Ethernet Link Guidelines 13-11 Guidelines for Configuring Cisco 575 LRE CPEs and 576 LRE 997 CPEs 13-11 Guidelines for Configuring Cisco 585 LRE CPEs 13-12 Assigning a Global Profile to All LRE Ports 13-12 Assigning a ... 13-14 Precedence 13-15 Profile Locking 13-15 Link Qualification and SNR Margins 13-16 Configuring LRE Link Persistence 13-19 Configuring LRE Link Monitor 13-20 Configuring LRE Interleave 13-20 Configuring Upstream Power Back-Off 13-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xii 78-11380-10
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... LRE Status 13-27 Configuring STP 14-1 Understanding Spanning-Tree Features 14-1 STP Overview 14-2 Spanning-Tree Topology and BPDUs 14-3 Bridge ID, Switch Priority, and Extended System...Configuring Spanning-Tree Features 14-11 Default Spanning-Tree Configuration 14-11 Spanning-Tree Configuration Guidelines 14-12 Changing the Spanning-Tree Mode 14-13 Disabling Spanning Tree 14-14 Configuring the Root Switch 14-14 Configuring a Secondary Root Switch 14-16 Configuring the Port Priority 14-17 Configuring the Path Cost 14-19 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
... LRE Status 13-27 Configuring STP 14-1 Understanding Spanning-Tree Features 14-1 STP Overview 14-2 Spanning-Tree Topology and BPDUs 14-3 Bridge ID, Switch Priority, and Extended System...Configuring Spanning-Tree Features 14-11 Default Spanning-Tree Configuration 14-11 Spanning-Tree Configuration Guidelines 14-12 Changing the Spanning-Tree Mode 14-13 Disabling Spanning Tree 14-14 Configuring the Root Switch 14-14 Configuring a Secondary Root Switch 14-16 Configuring the Port Priority 14-17 Configuring the Path Cost 14-19 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
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...-13 Configuring the Root Switch 15-14 Configuring a Secondary Root Switch 15-16 Configuring the Port Priority 15-17 Configuring the Path Cost 15-18 Configuring the Switch Priority 15-19 Configuring the Hello Time 15-19 Configuring the Forwarding-Delay Time 15-20 Configuring the Maximum-Aging Time 15-21 Configuring the Maximum-Hop Count 15-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xiv...
...-13 Configuring the Root Switch 15-14 Configuring a Secondary Root Switch 15-16 Configuring the Port Priority 15-17 Configuring the Path Cost 15-18 Configuring the Switch Priority 15-19 Configuring the Hello Time 15-19 Configuring the Forwarding-Delay Time 15-20 Configuring the Maximum-Aging Time 15-21 Configuring the Maximum-Hop Count 15-21 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xiv...
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... T E R Specifying the Link Type to Ensure Rapid Transitions 15-22 Restarting the Protocol Migration Process 15-22 Displaying the MST Configuration and Status 15-23 Configuring Optional Spanning-Tree Features 16-1 Understanding Optional Spanning-Tree Features 16-1 Understanding Port Fast 16-2 Understanding BPDU Guard 16-2 Understanding BPDU Filtering... 16-19 Displaying the Spanning-Tree Status 16-20 Configuring VLANs 17-1 Understanding VLANs 17-1 Supported VLANs 17-2 VLAN Port Membership Modes 17-3 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xv
... T E R Specifying the Link Type to Ensure Rapid Transitions 15-22 Restarting the Protocol Migration Process 15-22 Displaying the MST Configuration and Status 15-23 Configuring Optional Spanning-Tree Features 16-1 Understanding Optional Spanning-Tree Features 16-1 Understanding Port Fast 16-2 Understanding BPDU Guard 16-2 Understanding BPDU Filtering... 16-19 Displaying the Spanning-Tree Status 16-20 Configuring VLANs 17-1 Understanding VLANs 17-1 Supported VLANs 17-2 VLAN Port Membership Modes 17-3 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xv
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... Token Ring VLANs 17-5 Normal-Range VLAN Configuration Guidelines 17-5 VLAN Configuration Mode Options 17-6 VLAN Configuration in config-vlan Mode 17-6 VLAN Configuration in VLAN Configuration Mode 17-6 Saving VLAN Configuration 17-7 Default Ethernet VLAN Configuration 17-7 Creating or Modifying an Ethernet VLAN...Cost 17-24 Configuring VMPS 17-25 Understanding VMPS 17-25 Dynamic Port VLAN Membership 17-26 VMPS Database Configuration File 17-26 Default VMPS Client Configuration 17-27 VMPS Configuration Guidelines 17-27 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xvi 78-...
... Token Ring VLANs 17-5 Normal-Range VLAN Configuration Guidelines 17-5 VLAN Configuration Mode Options 17-6 VLAN Configuration in config-vlan Mode 17-6 VLAN Configuration in VLAN Configuration Mode 17-6 Saving VLAN Configuration 17-7 Default Ethernet VLAN Configuration 17-7 Creating or Modifying an Ethernet VLAN...Cost 17-24 Configuring VMPS 17-25 Understanding VMPS 17-25 Dynamic Port VLAN Membership 17-26 VMPS Database Configuration File 17-26 Default VMPS Client Configuration 17-27 VMPS Configuration Guidelines 17-27 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xvi 78-...
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... VTP Pruning 18-4 Configuring VTP 18-6 Default VTP Configuration 18-6 VTP Configuration Options 18-7 VTP Configuration in Global Configuration Mode 18-7 VTP Configuration in VLAN Configuration Mode 18-7 VTP Configuration Guidelines 18-8 Domain ...Configuration Requirements 18-9 Configuring a VTP Server 18-9 Configuring a VTP Client 18-11 Disabling VTP (VTP Transparent Mode) 18-12 Enabling VTP Version 2 18-13 Enabling VTP Pruning 18-14 Adding a VTP Client Switch to a VTP Domain 18-14 Monitoring VTP 18-16 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
... VTP Pruning 18-4 Configuring VTP 18-6 Default VTP Configuration 18-6 VTP Configuration Options 18-7 VTP Configuration in Global Configuration Mode 18-7 VTP Configuration in VLAN Configuration Mode 18-7 VTP Configuration Guidelines 18-8 Domain ...Configuration Requirements 18-9 Configuring a VTP Server 18-9 Configuring a VTP Client 18-11 Disabling VTP (VTP Transparent Mode) 18-12 Enabling VTP Version 2 18-13 Enabling VTP Pruning 18-14 Adding a VTP Client Switch to a VTP Domain 18-14 Monitoring VTP 18-16 Contents 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
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...VLAN 19-1 Configuring Voice VLAN 19-2 Default Voice VLAN Configuration 19-2 Voice VLAN Configuration Guidelines 19-3 Configuring a Port to Connect to a Cisco 7960 IP Phone 19-3 Configuring Ports to Carry Voice Traffic in 802.1Q Frames 19-4 Configuring Ports to Carry...Configuration 20-8 Configuring IGMP Snooping and MVR 21-1 Understanding IGMP Snooping 21-1 IGMP Versions 21-2 Joining a Multicast Group 21-3 Leaving a Multicast Group 21-4 Immediate-Leave Processing 21-5 IGMP Report Suppression 21-5 Source-Only Networks 21-5 xviii Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
...VLAN 19-1 Configuring Voice VLAN 19-2 Default Voice VLAN Configuration 19-2 Voice VLAN Configuration Guidelines 19-3 Configuring a Port to Connect to a Cisco 7960 IP Phone 19-3 Configuring Ports to Carry Voice Traffic in 802.1Q Frames 19-4 Configuring Ports to Carry...Configuration 20-8 Configuring IGMP Snooping and MVR 21-1 Understanding IGMP Snooping 21-1 IGMP Versions 21-2 Joining a Multicast Group 21-3 Leaving a Multicast Group 21-4 Immediate-Leave Processing 21-5 IGMP Report Suppression 21-5 Source-Only Networks 21-5 xviii Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
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...-27 Configuring Port-Based Traffic Control 22-1 Configuring Storm Control 22-1 Understanding Storm Control 22-2 Default Storm Control Configuration 22-2 Enabling Storm Control 22-2 Disabling Storm Control 22-4 Configuring Protected Ports 22-4 Configuring Port Blocking 22-5 Blocking Flooded Traffic on an Interface 22-5 Resuming Normal Forwarding on a Port 22-6 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
...-27 Configuring Port-Based Traffic Control 22-1 Configuring Storm Control 22-1 Understanding Storm Control 22-2 Default Storm Control Configuration 22-2 Enabling Storm Control 22-2 Disabling Storm Control 22-4 Configuring Protected Ports 22-4 Configuring Port Blocking 22-5 Blocking Flooded Traffic on an Interface 22-5 Resuming Normal Forwarding on a Port 22-6 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide...
Software Configuration Guide
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... an Interface Shut Down by UDLD 23-6 Displaying UDLD Status 23-7 Configuring CDP 24-1 Understanding CDP 24-1 Configuring CDP 24-2 Default CDP Configuration 24-2 Configuring the CDP Characteristics 24-2 Disabling and Enabling CDP 24-3 Disabling and Enabling CDP on an Interface 24-4 Monitoring and Maintaining CDP 24-5 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xx 78-11380-10
... an Interface Shut Down by UDLD 23-6 Displaying UDLD Status 23-7 Configuring CDP 24-1 Understanding CDP 24-1 Configuring CDP 24-2 Default CDP Configuration 24-2 Configuring the CDP Characteristics 24-2 Disabling and Enabling CDP 24-3 Disabling and Enabling CDP on an Interface 24-4 Monitoring and Maintaining CDP 24-5 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide xx 78-11380-10