Cisco Catalyst 2950

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide

78-11380-12

Chapter 9 Configuring IEEE 802.1x Port-Based Authentication

Displaying IEEE 802.1x Statistics and Status

For detailed information about the fields in these displays, see the command reference for this release.

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Default Chapter4
- Table of Contents4
- Obtaining Documentation29
- Related Publications29
- Ordering Documentation30
- Product Documentation DVD30
- Cisco Product Security Overview31
- Documentation Feedback31
- Reporting Security Problems in Cisco Products31
- Obtaining Technical Assistance32
- Definitions of Service Request Severity33
- Obtaining Additional Publications and Information33
- Submitting a Service Request33
- Vlan Support40
- Management Interface Options43
- Management Options43
- Network Configuration Examples45
- Design Concepts for Using the Switch46
- Small to Medium-Sized Network Configuration49
- Collapsed Backbone and Switch Cluster Configuration50
- Hotel Network Configuration51
- Service-Provider Central-Office Configuration54
- Large Campus Configuration55
- Multidwelling Network Using Catalyst 2950 Switches56
- Long-Distance, High-Bandwidth Transport Configuration58
Chapter 2 Using the Command-Line Interface58
- Where to Go Next58
- Cisco IOS Command Modes59
- Getting Help61
- Abbreviating Commands62
- Using no and Default Forms of Commands62
- Understanding CLI Messages63
- Using Command History63
- Using Editing Features64
- Accessing the CLI67
- Searching and Filtering Output of Show and more Commands67
CHAPTER 3 Configuring Catalyst 2955 Switch Alarms69
- Understanding Catalyst 2955 Switch Alarms69
- Configuring Catalyst 2955 Switch Alarms71
- Displaying Catalyst 2955 Switch Alarms Status79
Chapter 4 Assigning the Switch IP Address and Default Gateway81
- Understanding the Boot Process81
- Assigning Switch Information82
- Checking and Saving the Running Configuration91
- Modifying the Startup Configuration91
- Scheduling a Reload of the Software Image96
  - Configuring a Scheduled Reload96
  - Displaying Scheduled Reload Information97
Chapter 5 Configuring IE2100 CNS Agents99
- Understanding IE2100 Series Configuration Registrar Software99
- Understanding CNS Embedded Agents103
- Configuring CNS Embedded Agents104
- Displaying CNS Configuration110
- Understanding Switch Clusters111
Chapter 6 Clustering Switche112
- Candidate Switch and Member Switch Characteristics113
- Using SNMP to Manage Switch Clusters114
- Using the CLI to Manage Switch Clusters114
  - Catalyst 1900 and Catalyst 2820 CLI Considerations114
- Managing the System Time and Date117
  - Understanding Network Time Protocol118
Chapter 7 Administering the Switch118
- Configuring NTP119
- Configuring Time and Date Manually127
- Configuring a System Name and Prompt130
- Creating a Banner133
- Managing the MAC Address Table135
- Managing the ARP Table142
Chapter 8 Configuring Switch-Based Authentication143
- Preventing Unauthorized Access to Your Switch143
- Protecting Access to Privileged EXEC Commands144
- Controlling Switch Access with TACACS152
- Controlling Switch Access with RADIUS159
- Configuring the Switch for Local Authentication and Authorization174
- Configuring the Switch for Secure Shell175
- Configuring the Switch for Secure Copy Protocol179
CHAPTER 9 Configuring IEEE 802.1X Port-Based Authentication182
- Understanding IEEE 802.1X Port-Based Authentication182
- Configuring IEEE 802.1X Authentication191
- Displaying IEEE 802.1X Statistics and Status205
Chapter 10 Configuring Interface Characteristics207
- Understanding Interface Types207
- Using the Interface Command210
- Configuring Ethernet Interfaces215
- Monitoring and Maintaining the Interfaces222
Chapter 11 Configuring Smartports Macros225
- Understanding Smartports Macros225
- Configuring Smartports Macros226
- Displaying Smartports Macros232
- Configuring LRE233
- Understanding LRE Features233
  - Ports on the Catalyst 2950 LRE Switches233
  - LRE Links and LRE Profiles234
    - LRE Profiles234
Chapter 12 Configuring LRE234
- LRE Sequences237
- CPE Ethernet Links238
- LRE Link Monitor239
- LRE Message Logging Process240
- Configuring LRE Ports240
- Upgrading LRE Switch Firmware256
- Displaying LRE Status259
- Configuring STP261
- Understanding Spanning-Tree Features261
  - STP Overview262
  - Spanning-Tree Topology and Bpdus262
Chapter 13 Configuring STP262
- Bridge ID, Switch Priority, and Extended System ID263
- Spanning-Tree Interface States264
- How a Switch or Port Becomes the Root Switch or Root Port267
- Spanning Tree and Redundant Connectivity268
- Spanning-Tree Address Management268
- Accelerated Aging to Retain Connectivity268
- Spanning-Tree Modes and Protocols269
- Supported Spanning-Tree Instances269
- Spanning-Tree Interoperability and Backward Compatibility270
- STP and IEEE 802.1Q Trunks270
- Configuring Spanning-Tree Features271
- Displaying the Spanning-Tree Status284
Chapter 14 Configuring MSTP285
- Understanding MSTP286
- Understanding RSTP290
- Configuring MSTP Features295
- Displaying the MST Configuration and Status307
CHAPTER 15 Configuring Optional Spanning-Tree Features309
- Understanding Optional Spanning-Tree Features309
- Configuring Optional Spanning-Tree Features321
- Displaying the Spanning-Tree Status330
Chapter 16 Configuring Vlans331
- Understanding Vlans331
  - Supported Vlans332
  - VLAN Port Membership Modes333
- Configuring Normal-Range Vlans334
- Configuring Extended-Range Vlans341
- Configuring VLAN Trunks344
- Displaying Vlans344
- Configuring VMPS354
- Configuring VTP363
- Understanding VTP363
  - The VTP Domain364
Chapter 17 Configuring VTP364
- VTP Modes365
- VTP Advertisements365
- VTP Version 2366
- VTP Pruning366
- Configuring VTP368
- Monitoring VTP378
Chapter 18 Configuring Voice VLAN379
- Understanding Voice VLAN379
- Configuring Voice VLAN380
- Displaying Voice VLAN384
- Understanding DHCP Features385
Chapter 19 Configuring DHCP Feature386
- Option-82 Data Insertion387
- Configuring DHCP Features389
- Displaying DHCP Information392
Chapter 20 Configuring IGMP Snooping and MVR394
- Joining a Multicast Group395
- Leaving a Multicast Group397
- Immediate-Leave Processing397
- IGMP Configurable-Leave Timer397
  - IGMP Leave Timer Guidelines398
- IGMP Report Suppression398
- IGMP Snooping Querier Configuration Guidelines and Restrictions398
- Source-Only Networks399
- Understanding IGMP Snooping394
  - IGMP Versions394
- Configuring IGMP Snooping399
- Displaying IGMP Snooping Information407
- Understanding Multicast VLAN Registration408
  - Using MVR in a Multicast Television Application409
- Configuring MVR411
- Displaying MVR Information414
- Configuring IGMP Filtering and Throttling415
- Displaying IGMP Filtering and Throttling Configuration420
CHAPTER 21 Configuring Port-Based Traffic Control421
- Configuring Storm Control421
- Configuring Protected Ports424
- Configuring Port Blocking425
  - Blocking Flooded Traffic on an Interface425
  - Resuming Normal Forwarding on a Port426
- Configuring Port Security426
- Displaying Port-Based Traffic Control Settings433
Chapter 22 Configuring UDLD435
- Understanding UDLD435
  - Modes of Operation435
  - Methods to Detect Unidirectional Links436
- Configuring UDLD438
- Displaying UDLD Status441
Chapter 23 Configuring CDP443
- Configuring CDP443
- Understanding CDP443
- Monitoring and Maintaining CDP447
Chapter 24 Configuring SPAN and RSPAN449
- Understanding SPAN and RSPAN449
- Configuring SPAN455
- Configuring RSPAN460
- Displaying SPAN and RSPAN Status465
Chapter 25 Configuring RMON467
- Understanding RMON467
- Configuring RMON468
- Displaying RMON Status472
Chapter 26 Configuring System Message Logging473
- Understanding System Message Logging473
- Configuring System Message Logging474
- Displaying the Logging Configuration484
- Understanding SNMP485
  - SNMP Versions486
Chapter 27 Configuring SNMP486
- SNMP Manager Functions487
- SNMP Agent Functions488
- SNMP Community Strings488
- Using SNMP to Access MIB Variables488
- SNMP Notifications489
- Configuring SNMP489
- Displaying SNMP Status500
Chapter 28 Configuring Network Security with Acls501
- Understanding Acls502
- Configuring Acls506
- Applying Acls to Terminal Lines or Physical Interfaces518
  - Applying Acls to a Terminal Line519
  - Applying Acls to a Physical Interface520
- Displaying ACL Information520
  - Displaying Acls520
  - Displaying Access Groups522
- Examples for Compiling Acls523
Chapter 29 Configuring Qos527
- Understanding Qos528
- Configuring Auto-Qos536
- Auto-Qos Configuration Example541
- Displaying Auto-Qos Information541
- Configuring Standard Qos544
- Displaying Standard Qos Information565
- Standard Qos Configuration Examples565
  - Qos Configuration for the Existing Wiring Closet566
  - Qos Configuration for the Intelligent Wiring Closet567
Chapter 30 Configuring Etherchannels569
- Understanding Etherchannels569
- Configuring Etherchannels575
- Displaying Etherchannel, Pagp, and LACP Status582
Chapter 31 Troubleshooting583
- Using Recovery Procedures583
- Diagnosing Connectivity Problems596
  - Using Ping597
    - Understanding Ping597
    - Executing Ping597
  - Using Layer 2 Traceroute598
- GBIC and SFP Module Security and Identification596
- Preventing Autonegotiation Mismatches596
- Diagnosing LRE Connection Problems600
- Using Debug Commands601
- Using the Crashinfo File604
- Using the Show Controllers Commands604
Appendix605
- MIB List605
Supported Mibs605
Appendix A Supported MIB606
- Using FTP to Access the MIB Files607
- Using FTP to Access the MIB Files608
Appendix609
Working with the Cisco IOS File System, Configuration Files, and Software Images609
- Working with the Flash File System609
- Working with Configuration Files616
- Working with Software Images627
I N D E X643

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