Software Guide
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Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Software Release 8.1 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-7815486= Text Part Number: 78-15486-01
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Software Release 8.1 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-7815486= Text Part Number: 78-15486-01
Software Guide
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... A COPY. Copyright © 1981, Regents of the University of the word partner does not imply a partnership relationship between Cisco and any other company. (0304R) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE...
... A COPY. Copyright © 1981, Regents of the University of the word partner does not imply a partnership relationship between Cisco and any other company. (0304R) Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide Copyright © 2000-2003, Cisco Systems, Inc. THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE...
Software Guide
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... Switch 1-2 Catalyst 2980G Switch 1-3 Supervisor Engine Software 1-3 Using the Command-Line Interface 2-1 Switch CLI Overview 2-1 Accessing the Switch CLI 2-2 Accessing the CLI Through the Console Port 2-2 Accessing the CLI Through Telnet 2-3 Switch CLI Command Modes 2-3 Accessing Help 2-4 Command-Line Editing 2-5 History Substitution 2-6 Abbreviating a Command 2-6 Completing a Partial Command 2-6 Scrolling Through Command Output 2-6 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... Switch 1-2 Catalyst 2980G Switch 1-3 Supervisor Engine Software 1-3 Using the Command-Line Interface 2-1 Switch CLI Overview 2-1 Accessing the Switch CLI 2-2 Accessing the CLI Through the Console Port 2-2 Accessing the CLI Through Telnet 2-3 Switch CLI Command Modes 2-3 Accessing Help 2-4 Command-Line Editing 2-5 History Substitution 2-6 Abbreviating a Command 2-6 Completing a Partial Command 2-6 Scrolling Through Command Output 2-6 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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... Levels 4-4 Setting Ethernet and Fast Ethernet Port Speeds 4-4 Setting Ethernet and Fast Ethernet Port Duplex Modes 4-5 Setting Ethernet and Fast Ethernet Port Debounce Timers 4-6 Configuring errdisable State Ethernet and Fast Ethernet Port Timeout Periods 4-7 Checking Ethernet and Fast Ethernet Port Connectivity 4-8 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 iv 78-15486-01
... Levels 4-4 Setting Ethernet and Fast Ethernet Port Speeds 4-4 Setting Ethernet and Fast Ethernet Port Duplex Modes 4-5 Setting Ethernet and Fast Ethernet Port Debounce Timers 4-6 Configuring errdisable State Ethernet and Fast Ethernet Port Timeout Periods 4-7 Checking Ethernet and Fast Ethernet Port Connectivity 4-8 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 iv 78-15486-01
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... an EtherChannel Administrative Group 6-7 Setting the EtherChannel Spanning Tree Port Cost 6-8 Setting the EtherChannel Spanning Tree Port VLAN Cost 6-9 Removing an EtherChannel Bundle 6-9 Displaying EtherChannel Configuration Information 6-10 Displaying EtherChannel Traffic Statistics 6-11 Displaying EtherChannel PAgP Statistics 6-12 EtherChannel Configuration Examples 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 v
... an EtherChannel Administrative Group 6-7 Setting the EtherChannel Spanning Tree Port Cost 6-8 Setting the EtherChannel Spanning Tree Port VLAN Cost 6-9 Removing an EtherChannel Bundle 6-9 Displaying EtherChannel Configuration Information 6-10 Displaying EtherChannel Traffic Statistics 6-11 Displaying EtherChannel PAgP Statistics 6-12 EtherChannel Configuration Examples 6-12 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 v
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... Displaying Spanning Tree-Related Information for EtherChannels 6-22 7 C H A P T E R Configuring Spanning Tree 7-1 Understanding How STPs Work 7-2 Understanding How a Topology Is Created 7-2 Understanding How a Switch or Port Becomes the Root Switch or Root Port 7-3 Understanding BPDUs 7-4 Calculating and Assigning Port Costs 7-4 Understanding Spanning Tree Port...Protocol 7-16 MST-to-SST Interoperability 7-17 Common Spanning Tree 7-18 MST Instances 7-18 MST Configuration 7-18 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 vi 78-15486-01
... Displaying Spanning Tree-Related Information for EtherChannels 6-22 7 C H A P T E R Configuring Spanning Tree 7-1 Understanding How STPs Work 7-2 Understanding How a Topology Is Created 7-2 Understanding How a Switch or Port Becomes the Root Switch or Root Port 7-3 Understanding BPDUs 7-4 Calculating and Assigning Port Costs 7-4 Understanding Spanning Tree Port...Protocol 7-16 MST-to-SST Interoperability 7-17 Common Spanning Tree 7-18 MST Instances 7-18 MST Configuration 7-18 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 vi 78-15486-01
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... Configuring the Forward Delay Time 7-45 Configuring the Maximum Aging Time 7-45 Configuring MST 7-46 Enabling MST 7-46 Mapping and Unmapping VLANs to an MST Instance 7-54 Configuring Spanning Tree BPDU Skewing 7-57 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard 8-1 Understanding How PortFast Works 8-1 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... Configuring the Forward Delay Time 7-45 Configuring the Maximum Aging Time 7-45 Configuring MST 7-46 Enabling MST 7-46 Mapping and Unmapping VLANs to an MST Instance 7-54 Configuring Spanning Tree BPDU Skewing 7-57 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard 8-1 Understanding How PortFast Works 8-1 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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... Guard 8-19 9 C H A P T E R Configuring VTP 9-1 Understanding How VTP Version 1 and Version 2 Work 9-1 Understanding the VTP Domain 9-2 Understanding VTP Modes 9-2 Understanding VTP Advertisements 9-3 Understanding VTP Version 2 9-3 Understanding VTP Pruning 9-4 Default VTP Version 1 and Version 2 Configuration 9-5 VTP Version 1 and Version 2 Configuration Guidelines 9-6 Configuring VTP Version 1 and Version 2 9-6 Configuring a VTP Server 9-7 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 viii 78...
... Guard 8-19 9 C H A P T E R Configuring VTP 9-1 Understanding How VTP Version 1 and Version 2 Work 9-1 Understanding the VTP Domain 9-2 Understanding VTP Modes 9-2 Understanding VTP Advertisements 9-3 Understanding VTP Version 2 9-3 Understanding VTP Pruning 9-4 Default VTP Version 1 and Version 2 Configuration 9-5 VTP Version 1 and Version 2 Configuration Guidelines 9-6 Configuring VTP Version 1 and Version 2 9-6 Configuring a VTP Server 9-7 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 viii 78...
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... Basis 9-29 VTP Version 3 show Commands 9-29 Configuring VLANs 10-1 Understanding How VLANs Work 10-1 VLAN Ranges 10-3 Configurable VLAN Parameters 10-4 VLAN Default Configuration 10-4 VLAN Configuration Guidelines 10-5 Configuring VLANs on the Switch 10-6 Creating or Modifying an Ethernet VLAN 10-6 ...Switch Ports to a VLAN 10-10 Mapping 802.1Q VLANs to ISL VLANs 10-11 Clearing 802.1Q-to-ISL VLAN Mappings 10-12 Deleting a VLAN 10-12 Configuring Auxiliary VLANs 10-13 Understanding Auxiliary VLANs 10-13 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... Basis 9-29 VTP Version 3 show Commands 9-29 Configuring VLANs 10-1 Understanding How VLANs Work 10-1 VLAN Ranges 10-3 Configurable VLAN Parameters 10-4 VLAN Default Configuration 10-4 VLAN Configuration Guidelines 10-5 Configuring VLANs on the Switch 10-6 Creating or Modifying an Ethernet VLAN 10-6 ...Switch Ports to a VLAN 10-10 Mapping 802.1Q VLANs to ISL VLANs 10-11 Clearing 802.1Q-to-ISL VLAN Mappings 10-12 Deleting a VLAN 10-12 Configuring Auxiliary VLANs 10-13 Understanding Auxiliary VLANs 10-13 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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... Trunking Support 11-3 802.1Q Trunk Restrictions 11-4 Default Trunk Configuration 11-5 Configuring a Trunk Link 11-5 Configuring an 802.1Q Trunk 11-5 Defining the Allowed VLANs on a ...Configuration 12-3 Configuration Guidelines for Dynamic Ports and VMPS 12-3 Configuring VMPS 12-4 Creating the VMPS Database 12-4 Configuring the VMPS Server 12-7 Configuring VMPS Clients 12-8 Monitoring VMPS 12-9 Maintaining VMPS 12-9 Configuring Static Ports 12-10 Troubleshooting VMPS and Dynamic Port VLAN Membership 12-11 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... Trunking Support 11-3 802.1Q Trunk Restrictions 11-4 Default Trunk Configuration 11-5 Configuring a Trunk Link 11-5 Configuring an 802.1Q Trunk 11-5 Defining the Allowed VLANs on a ...Configuration 12-3 Configuration Guidelines for Dynamic Ports and VMPS 12-3 Configuring VMPS 12-4 Creating the VMPS Database 12-4 Configuring the VMPS Server 12-7 Configuring VMPS Clients 12-8 Monitoring VMPS 12-9 Maintaining VMPS 12-9 Configuring Static Ports 12-10 Troubleshooting VMPS and Dynamic Port VLAN Membership 12-11 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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...-4 Configuring QoS on the Switch 14-4 Enabling QoS Globally 14-5 Configuring the Default CoS Value for the Switch 14-5 Reverting to the Default Switch CoS Value 14-5 Mapping CoS Values to Transmit Queues and Drop Thresholds 14-6 Reverting to the Default CoS-to-Transmit Queue and Drop Threshold Mapping 14-6 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
...-4 Configuring QoS on the Switch 14-4 Enabling QoS Globally 14-5 Configuring the Default CoS Value for the Switch 14-5 Reverting to the Default Switch CoS Value 14-5 Mapping CoS Values to Transmit Queues and Drop Thresholds 14-6 Reverting to the Default CoS-to-Transmit Queue and Drop Threshold Mapping 14-6 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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...-Leave Processing 15-8 Disabling CGMP 15-8 Configuring GMRP 15-9 GMRP Software Requirements 15-9 Default GMRP Configuration 15-9 Enabling GMRP Globally 15-9 Enabling GMRP on Individual Switch Ports 15-10 Disabling GMRP on Individual Switch Ports 15-10 Enabling GMRP Forward-All Option...-15 Disabling GMRP 15-15 Configuring Multicast Router Ports and Group Entries 15-15 Specifying Multicast Router Ports 15-16 Configuring Multicast Groups 15-16 Disabling Multicast Router Ports 15-17 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xii 78-15486...
...-Leave Processing 15-8 Disabling CGMP 15-8 Configuring GMRP 15-9 GMRP Software Requirements 15-9 Default GMRP Configuration 15-9 Enabling GMRP Globally 15-9 Enabling GMRP on Individual Switch Ports 15-10 Disabling GMRP on Individual Switch Ports 15-10 Enabling GMRP Forward-All Option...-15 Disabling GMRP 15-15 Configuring Multicast Router Ports and Group Entries 15-15 Specifying Multicast Router Ports 15-16 Configuring Multicast Groups 15-16 Disabling Multicast Router Ports 15-17 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xii 78-15486...
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... 16-2 Blocking Unicast Flood Packets on Secure Ports 16-3 Port Security Configuration Guidelines 16-3 Configuring Port Security on the Switch 16-3 Enabling Port Security 16-3 Setting the Maximum Number of Secure MAC...Configuring Unicast Flood Blocking on the Switch 17-2 Enabling Unicast Flood Blocking 17-2 Disabling Unicast Flood Blocking 17-3 Displaying Unicast Flood Blocking 17-3 Configuring the IP Permit List 18-1 Understanding How the IP Permit List Works 18-1 IP Permit List Default Configuration 18-2 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... 16-2 Blocking Unicast Flood Packets on Secure Ports 16-3 Port Security Configuration Guidelines 16-3 Configuring Port Security on the Switch 16-3 Enabling Port Security 16-3 Setting the Maximum Number of Secure MAC...Configuring Unicast Flood Blocking on the Switch 17-2 Enabling Unicast Flood Blocking 17-2 Disabling Unicast Flood Blocking 17-3 Displaying Unicast Flood Blocking 17-3 Configuring the IP Permit List 18-1 Understanding How the IP Permit List Works 18-1 IP Permit List Default Configuration 18-2 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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... 18-4 Clearing an IP Permit List Entry 18-4 Configuring Protocol Filtering 19-1 Understanding How Protocol Filtering Works 19-1 Default Protocol Filtering Configuration 19-2 Configuring Protocol Filtering on the Switch 19-2 Configuring Protocol Filtering 19-2 Disabling Protocol Filtering 19-3 Checking ... IP Traceroute 20-12 Configuring CDP 21-1 Understanding How CDP Works 21-1 Default CDP Configuration 21-2 Configuring CDP on the Switch 21-2 Setting the CDP Global Enable State 21-2 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xiv 78-...
... 18-4 Clearing an IP Permit List Entry 18-4 Configuring Protocol Filtering 19-1 Understanding How Protocol Filtering Works 19-1 Default Protocol Filtering Configuration 19-2 Configuring Protocol Filtering on the Switch 19-2 Configuring Protocol Filtering 19-2 Disabling Protocol Filtering 19-3 Checking ... IP Traceroute 20-12 Configuring CDP 21-1 Understanding How CDP Works 21-1 Default CDP Configuration 21-2 Configuring CDP on the Switch 21-2 Setting the CDP Global Enable State 21-2 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xiv 78-...
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... SNMPv2c Default Configuration 24-6 Configuring SNMPv1 and SNMPv2c from an NMS 24-6 Configuring SNMPv1 and SNMPv2c from the CLI 24-6 SNMPv1 and SNMPv2c Enhancements in Software Release 7.5(1) 24-8 Understanding SNMPv3 24-11 Benefits of SNMPv3 24-11 SNMP Entity 24-11 Configuring SNMPv3 from an NMS 24-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
... SNMPv2c Default Configuration 24-6 Configuring SNMPv1 and SNMPv2c from an NMS 24-6 Configuring SNMPv1 and SNMPv2c from the CLI 24-6 SNMPv1 and SNMPv2c Enhancements in Software Release 7.5(1) 24-8 Understanding SNMPv3 24-11 Benefits of SNMPv3 24-11 SNMP Entity 24-11 Configuring SNMPv3 from an NMS 24-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
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...-8 RSPAN Configuration Guidelines 26-9 Configuring RSPAN 26-10 RSPAN Configuration Examples 26-13 27 C H A P T E R Administering the Switch 27-1 Setting the System Name and System Prompt 27-1 Configuring the System Name and Prompt 27-2 Setting the System Contact and Location 27-3 Setting the System Clock 27-4 Creating a Login Banner 27-4 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
...-8 RSPAN Configuration Guidelines 26-9 Configuring RSPAN 26-10 RSPAN Configuration Examples 26-13 27 C H A P T E R Administering the Switch 27-1 Setting the System Name and System Prompt 27-1 Configuring the System Name and Prompt 27-2 Setting the System Contact and Location 27-3 Setting the System Clock 27-4 Creating a Login Banner 27-4 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release...
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... 27-5 Enabling or Disabling the "Cisco Systems Console" Telnet Login Banner 27-5 Defining and Using Command Aliases 27-6 Defining and Using IP Aliases 27-7 Configuring Permanent and Static ARP Entries 27-8 Configuring Static Routes 27-9 Scheduling a System...Catalyst 4006 Switch 28-16 Displaying System Information 28-17 Migrating a Supervisor Engine II from a Catalyst 4006 Switch to a Catalyst 4500 Series Switch 28-18 Configuring Inline Power 28-18 Setting the Power Mode of a Port or Group of Ports 28-18 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... 27-5 Enabling or Disabling the "Cisco Systems Console" Telnet Login Banner 27-5 Defining and Using Command Aliases 27-6 Defining and Using IP Aliases 27-7 Configuring Permanent and Static ARP Entries 27-8 Configuring Static Routes 27-9 Scheduling a System...Catalyst 4006 Switch 28-16 Displaying System Information 28-17 Migrating a Supervisor Engine II from a Catalyst 4006 Switch to a Catalyst 4500 Series Switch 28-18 Configuring Inline Power 28-18 Setting the Power Mode of a Port or Group of Ports 28-18 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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... for Modules and Individual Ports 28-19 Configuring VoIP 29-1 Hardware and Software Requirements 29-1 Overview of IP Phones 29-2 Configuring VoIP on a Switch 29-3 Configuring Switch Access Using AAA 30-1 Understanding How Authentication...Configuring Authorization 30-43 Authorization Default Configuration 30-43 TACACS+ Authorization Configuration Guidelines 30-43 Configuring TACACS+ Authorization 30-43 Authorization Example 30-46 Understanding How Accounting Works 30-47 Accounting Overview 30-48 xviii Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
... for Modules and Individual Ports 28-19 Configuring VoIP 29-1 Hardware and Software Requirements 29-1 Overview of IP Phones 29-2 Configuring VoIP on a Switch 29-3 Configuring Switch Access Using AAA 30-1 Understanding How Authentication...Configuring Authorization 30-43 Authorization Default Configuration 30-43 TACACS+ Authorization Configuration Guidelines 30-43 Configuring TACACS+ Authorization 30-43 Authorization Example 30-46 Understanding How Accounting Works 30-47 Accounting Overview 30-48 xviii Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
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...and Unauthorized States 31-4 Authentication Server 31-5 802.1x Parameters Configurable on the Switch 31-6 802.1x VLAN Assignment Using a RADIUS Server 31-6 Authentication Default Configuration 31-7 Authentication Configuration Guidelines 31-8 Configuring 802.1x Authentication on the Switch 31-8 Enabling 802.1x Globally 31-8 Disabling 802.1x ...Setting the Back-End Authenticator-to-Host Frame-Retransmission Number 31-14 Resetting the 802.1x Configuration Parameters to the Default Values 31-15 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xix
...and Unauthorized States 31-4 Authentication Server 31-5 802.1x Parameters Configurable on the Switch 31-6 802.1x VLAN Assignment Using a RADIUS Server 31-6 Authentication Default Configuration 31-7 Authentication Configuration Guidelines 31-8 Configuring 802.1x Authentication on the Switch 31-8 Enabling 802.1x Globally 31-8 Disabling 802.1x ...Setting the Back-End Authenticator-to-Host Frame-Retransmission Number 31-14 Resetting the 802.1x Configuration Parameters to the Default Values 31-15 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 xix
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...Using the show Commands 31-16 Modifying the Switch Boot Configuration 32-1 Understanding How the Switch Boot Configuration Works 32-1 Understanding the Boot Process 32-1 Understanding the ROM Monitor 32-2 Understanding the Configuration Register 32-2 Understanding the BOOT Environment Variable ...Switch Using rcp 33-5 Understanding How rcp Software Image Downloads Work 33-6 Preparing to Download an Image Using rcp 33-6 Downloading Supervisor Engine Images Using rcp 33-6 Sample rcp Download Procedures 33-7 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...
...Using the show Commands 31-16 Modifying the Switch Boot Configuration 32-1 Understanding How the Switch Boot Configuration Works 32-1 Understanding the Boot Process 32-1 Understanding the ROM Monitor 32-2 Understanding the Configuration Register 32-2 Understanding the BOOT Environment Variable ...Switch Using rcp 33-5 Understanding How rcp Software Image Downloads Work 33-6 Preparing to Download an Image Using rcp 33-6 Downloading Supervisor Engine Images Using rcp 33-6 Sample rcp Download Procedures 33-7 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide...