Cisco Catalyst 3750 - Where to Go Next

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Catalyst 3750 Metro Switch Software Configuration Guide

78-15870-01

Chapter 1 Overview

Where to Go Next

See Chapter 30, “Configuring MPLS and EoMPLS,” for more information on configuring MPLS VPN.

Where to Go Next

Before configuring the switch, review these sections for startup information:

• Chapter 2, “Using the Command-Line Interface”

• Chapter 3, “Assigning the Switch IP Address and Default Gateway”

Main Page

Default Chapter3
- Table of Contents3
- Obtaining Documentation35
  - Ordering Documentation36
- Related Publications35
- Documentation Feedback36
- Obtaining Technical Assistance36
- Obtaining Additional Publications and Information37
- Features39
Chapter 1 Overview40
- Default Settings after Initial Switch Configuration46
- Network Configuration Examples49
- Where to Go Next54
Understanding Command Modes55
CHAPTER 2 C H a P T E R 2 Using the Command-Line Interface56
Understanding the Help System57
Understanding Abbreviated Commands58
Understanding no and Default Forms of Commands58
Using Command History59
- Changing the Command History Buffer Size59
Understanding CLI Error Messages59
- Recalling Commands60
- Disabling the Command History Feature60
Using Editing Features60
- Enabling and Disabling Editing Features61
- Editing Commands through Keystrokes61
- Editing Command Lines that Wrap62
Searching and Filtering Output of Show and more Commands63
Accessing the CLI63
- Accessing the CLI through a Console Connection or through Telnet64
- Accessing the CLI from a Browser64
Chapter 3 Assigning the Switch IP Address and Default Gateway65
- Understanding the Boot Process65
- Assigning Switch Information66
- Checking and Saving the Running Configuration74
- Modifying the Startup Configuration74
- Scheduling a Reload of the Software Image79
  - Configuring a Scheduled Reload79
  - Displaying Scheduled Reload Information80
Chapter 4 Configuring IE2100 CNS Agents81
- Understanding IE2100 Series Configuration Registrar Software81
- Understanding CNS Embedded Agents85
- Configuring CNS Embedded Agents86
- Displaying CNS Configuration92
- Managing the System Time and Date93
  - Understanding the System Clock94
  - Understanding Network Time Protocol94
Chapter 5 Administering the Switch94
- Configuring NTP96
  - Default NTP Configuration96
- Configuring NTP Authentication97
- Configuring NTP Associations98
- Configuring NTP Broadcast Service99
- Configuring NTP Access Restrictions100
- Configuring the Source IP Address for NTP Packets102
  - Configuring Time and Date Manually103
- Displaying the NTP Configuration103
  - Configuring a System Name and Prompt107
Table109
- Creating a Banner110
- Displaying the DNS Configuration110
- Managing the MAC Address Table112
  - Building the Address Table113
  - MAC Addresses and Vlans113
- Default MAC Address Table Configuration114
- Changing the Address Aging Time114
- Removing Dynamic Address Entries114
- Configuring MAC Address Notification Traps115
- Adding and Removing Static Address Entries116
- Displaying Address Table Entries117
  - Managing the ARP Table118
Chapter 6 Configuring SDM Templates119
- Understanding the SDM Templates119
- Configuring the Switch SDM Template120
- Displaying the SDM Templates122
CHAPTER 7 Configuring Switch-Based Authentication123
- Preventing Unauthorized Access to Your Switch123
- Protecting Access to Privileged EXEC Commands124
Controlling Switch Access with TACACS132
- Understanding TACACS132
- TACACS+ Operation134
- Configuring TACACS134
- Displaying the TACACS+ Configuration139
Controlling Switch Access with RADIUS139
- Understanding RADIUS140
- RADIUS Operation141
- Configuring RADIUS142
- Displaying the RADIUS Configuration153
Controlling Switch Access with Kerberos153
- Understanding Kerberos154
- Kerberos Operation156
- Configuring Kerberos157
Configuring the Switch for Local Authentication and Authorization158
Configuring the Switch for Secure Shell159
- Understanding SSH159
- Configuring SSH159
CHAPTER 8 Configuring 802.1X Port-Based Authentication162
- Understanding 802.1X Port-Based Authentication162
- Configuring 802.1X Authentication169
- Displaying 802.1X Statistics and Status179
CHAPTER 9 Configuring Interface Characteristics182
- Understanding Interface Types182
- Using Interface Configuration Mode186
- Configuring Ethernet Interfaces191
- Configuring Layer 3 Interfaces198
- Configuring the System MTU199
- Monitoring and Maintaining the Interfaces200
Chapter 10 Configuring Vlans203
- Understanding Vlans203
  - Supported Vlans205
  - VLAN Port Membership Modes205
- Configuring Normal-Range Vlans206
- Token Ring Vlans208
- Normal-Range VLAN Configuration Guidelines208
- VLAN Configuration Mode Options209
  - VLAN Configuration in Config-Vlan Mode209
  - VLAN Configuration in VLAN Database Configuration Mode209
- Saving VLAN Configuration209
- Default Ethernet VLAN Configuration210
- Creating or Modifying an Ethernet VLAN211
- Deleting a VLAN213
- Assigning Static-Access Ports to a VLAN213
Chapter 11 Configuring VTP237
- Understanding VTP237
- Configuring VTP240
- Default VTP Configuration242
- VTP Configuration Options243
  - VTP Configuration in Global Configuration Mode243
  - VTP Configuration in VLAN Database Configuration Mode243
- VTP Configuration Guidelines244
- Configuring a VTP Server245
- Configuring a VTP Client247
- Disabling VTP (VTP Transparent Mode)248
- Enabling VTP Version 2249
- Enabling VTP Pruning250
- Adding a VTP Client Switch to a VTP Domain251
  - Monitoring VTP252
    - Table252
Chapter 12 Configuring Voice VLAN253
- Understanding Voice VLAN253
  - Cisco IP Phone Voice Traffic254
  - Cisco IP Phone Data Traffic254
- Configuring Voice VLAN255
- Displaying Voice VLAN258
CHAPTER 13 Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling260
- Understanding 802.1Q Tunneling260
- C H a P T E R 13 Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling260
Configuring 802.1Q Tunneling262
- Default 802.1Q Tunneling Configuration262
- 802.1Q Tunneling Configuration Guidelines262
  - Native Vlans262
  - System MTU263
- 802.1Q Tunneling and Other Features264
- Configuring an 802.1Q Tunneling Port264
Configuring VLAN Mapping265
- Default VLAN Mapping Configuration266
- Mapping Customer Vlans to Service-Provider Vlans266
- Mapping Customer 802.1Q Traffic with VLAN Ids267
Understanding Layer 2 Protocol Tunneling268
Configuring Layer 2 Protocol Tunneling270
- Default Layer 2 Protocol Tunneling Configuration271
- Layer 2 Protocol Tunneling Configuration Guidelines271
- Configuring Layer 2 Tunneling272
Monitoring and Maintaining Tunneling and Mapping Status274
Understanding Spanning-Tree Features275
- Configuring STP276
- Understanding Spanning-Tree Features276
Chapter 14 Configuring STP276
- STP Overview276
- Spanning-Tree Topology and Bpdus277
- Bridge ID, Switch Priority, and Extended System ID278
- Spanning-Tree Interface States278
  - Blocking State279
  - Listening State280
  - Learning State280
  - Forwarding State280
  - Disabled State281
- How a Switch or Port Becomes the Root Switch or Root Port281
- Spanning Tree and Redundant Connectivity282
- Spanning-Tree Address Management282
- Accelerated Aging to Retain Connectivity282
- Spanning-Tree Modes and Protocols283
- Supported Spanning-Tree Instances284
  - Spanning-Tree Interoperability and Backward Compatibility284
  - STP and IEEE 802.1Q Trunks284
  - VLAN-Bridge Spanning Tree285
  - Configuring Spanning-Tree Features285
- Default Spanning-Tree Configuration285
- Spanning-Tree Configuration Guidelines286
- Changing the Spanning-Tree Mode287
- Disabling Spanning Tree288
- Configuring the Root Switch288
- Configuring a Secondary Root Switch290
- Configuring Port Priority291
- Configuring Path Cost292
- Configuring the Switch Priority of a VLAN293
- Configuring Spanning-Tree Timers294
  - Configuring the Hello Time294
  - Configuring the Forwarding-Delay Time for a VLAN295
  - Configuring the Maximum-Aging Time for a VLAN295
  - Displaying the Spanning-Tree Status296
    - Table296
Chapter 15 Configuring MSTP297
- Understanding MSTP298
- Understanding RSTP302
- Configuring MSTP Features307
- Default MSTP Configuration308
- MSTP Configuration Guidelines308
- Specifying the MST Region Configuration and Enabling MSTP309
- Configuring the Root Switch310
- Configuring a Secondary Root Switch312
- Configuring Port Priority313
- Configuring Path Cost314
- Configuring the Switch Priority315
- Configuring the Hello Time315
- Configuring the Forwarding-Delay Time316
- Configuring the Maximum-Aging Time317
- Configuring the Maximum-Hop Count317
- Specifying the Link Type to Ensure Rapid Transitions318
  - Displaying the MST Configuration and Status319
- Restarting the Protocol Migration Process318
Understanding Optional Spanning-Tree Features321
CHAPTER 16 Configuring Optional Spanning-Tree Features322
- Understanding Optional Spanning-Tree Features322
- Understanding Port Fast322
  - Configuring Optional Spanning-Tree Features322
- Understanding BPDU Guard323
- Understanding BPDU Filtering323
- Understanding Uplinkfast324
- Understanding Backbonefast325
- Understanding Root Guard327
  - Configuring Optional Spanning-Tree Features328
- Understanding Loop Guard328
- Default Optional Spanning-Tree Configuration329
- Optional Spanning-Tree Configuration Guidelines329
- Enabling Port Fast330
- Enabling BPDU Guard331
- Enabling BPDU Filtering332
- Enabling Uplinkfast for Use with Redundant Links333
- Enabling Backbonefast334
- Enabling Root Guard334
- Enabling Loop Guard335
  - Displaying the Spanning-Tree Status336
    - Table336
Chapter 17 Configuring IGMP Snooping and MVR338
- Leaving a Multicast Group340
- Immediate-Leave Processing341
Understanding IGMP Snooping338
- Joining a Multicast Group338
Configuring IGMP Snooping341
- Default IGMP Snooping Configuration341
- Enabling or Disabling IGMP Snooping342
- Setting the Snooping Method342
- Configuring a Multicast Router Port344
- Configuring a Host Statically to Join a Group345
- Enabling IGMP Immediate-Leave Processing346
Displaying IGMP Snooping Information346
Understanding Multicast VLAN Registration348
- Using MVR in a Multicast Television Application349
Configuring MVR350
- Default MVR Configuration350
- MVR Configuration Guidelines and Limitations351
- Configuring MVR Global Parameters351
- Configuring MVR Interfaces353
Displaying MVR Information354
Configuring IGMP Filtering355
- Default IGMP Filtering Configuration355
- Configuring IGMP Profiles355
- Applying IGMP Profiles356
- Setting the Maximum Number of IGMP Groups357
Displaying IGMP Filtering Configuration358
CHAPTER 18 Configuring Port-Based Traffic Control359
- Configuring Storm Control359
  - Understanding Storm Control359
Configuring Storm Control360
- C H a P T E R 18 Configuring Port-Based Traffic Control361
- Default Storm Control Configuration361
- Enabling Storm Control361
Configuring Protected Ports362
- Default Protected Port Configuration362
- Protected Port Configuration Guidelines363
- Configuring a Protected Port363
Configuring Port Blocking363
- Default Port Blocking Configuration363
- Blocking Flooded Traffic on an Interface364
Configuring Port Security364
- Understanding Port Security365
  - Secure MAC Addresses365
  - Security Violations366
- Default Port Security Configuration367
- Configuration Guidelines367
- Enabling and Configuring Port Security368
- Enabling and Configuring Port Security Aging371
Displaying Port-Based Traffic Control Settings372
Chapter 19 Configuring CDP373
- Understanding CDP373
- Configuring CDP374
- Monitoring and Maintaining CDP377
Chapter 20 Configuring UDLD379
- Understanding UDLD379
  - Modes of Operation379
  - Methods to Detect Unidirectional Links380
- Configuring UDLD382
- Displaying UDLD Status384
Chapter 21 Configuring SPAN and RSPAN385
- Understanding SPAN and RSPAN385
- Configuring SPAN and RSPAN393
- Displaying SPAN and RSPAN Status407
Chapter 22 Configuring RMON409
- Understanding RMON409
- Configuring RMON410
- Displaying RMON Status414
Chapter 23 Configuring System Message Logging415
- Understanding System Message Logging415
- Configuring System Message Logging416
  - System Log Message Format416
- Default System Message Logging Configuration417
  - Table417
- Disabling Message Logging418
- Setting the Message Display Destination Device418
- Synchronizing Log Messages419
- Enabling and Disabling Timestamps on Log Messages421
- Enabling and Disabling Sequence Numbers in Log Messages421
- Defining the Message Severity Level422
  - Limiting Syslog Messages Sent to the History Table and to SNMP423
- Configuring UNIX Syslog Servers424
Chapter 24 Configuring SNMP427
- Understanding SNMP427
- Configuring SNMP431
- Default SNMP Configuration432
- SNMP Configuration Guidelines432
- Disabling the SNMP Agent433
- Configuring Community Strings433
- Configuring SNMP Groups and Users434
- Configuring SNMP Notifications436
- Setting the Agent Contact and Location Information439
- Limiting TFTP Servers Used through SNMP439
- SNMP Examples440
  - Displaying SNMP Status441
Chapter 25 Configuring Network Security with Acls443
- Understanding Acls443
  - Supported Acls444
  - Handling Fragmented and Unfragmented Traffic447
- Configuring IP Acls448
- Creating Named MAC Extended Acls467
  - Applying a MAC ACL to a Layer 2 Interface468
- Configuring VLAN Maps469
- Using VLAN Maps with Router Acls476
  - Guidelines476
  - Examples of Router Acls and VLAN Maps Applied to Vlans477
- Displaying ACL Configuration480
Chapter 26 Configuring Qos481
- Understanding Qos482
- Understanding Hierarchical Qos499
- Configuring Auto-Qos509
- Displaying Auto-Qos Information517
- Configuring Standard Qos517
- Displaying Standard Qos Information555
- Configuring Hierarchical Qos556
- Displaying Hierarchical Qos Information581
- Understanding Etherchannels583
- Etherchannel Overview584
  - C H a P T E R 27 Configuring Etherchannels584
- Port-Channel Interfaces585
- Port Aggregation Protocol586
  - Pagp Modes586
  - Pagp Interaction with Other Features587
- Link Aggregation Control Protocol587
  - LACP Modes588
  - LACP Interaction with Other Features588
- Load Balancing and Forwarding Methods588
CHAPTER 27 Configuring Etherchannels590
- Default Etherchannel Configuration591
- Etherchannel Configuration Guidelines591
- Configuring Layer 2 Etherchannels592
- Configuring Layer 3 Etherchannels594
  - Creating Port-Channel Logical Interfaces594
  - Configuring the Physical Interfaces595
- Configuring Etherchannel Load Balancing597
- Configuring the Pagp Learn Method and Priority598
- Configuring LACP Hot-Standby Ports599
Chapter 28 Configuring IP Unicast Routing603
- Understanding IP Routing604
- Steps for Configuring Routing605
- Configuring IP Addressing606
- Enabling IP Unicast Routing619
- Configuring RIP620
- Configuring IGRP625
- Configuring OSPF630
- Configuring EIGRP639
- Configuring BGP645
- Configuring ISO CLNS Routing665
- Configuring Multi-VRF CE678
- Configuring Protocol-Independent Features688
- Monitoring and Maintaining the IP Network702
Chapter 29 Configuring HSRP703
- Understanding HSRP703
- Configuring HSRP705
- Displaying HSRP Configurations712
Chapter 30 Configuring MPLS and Eompls713
- Understanding MPLS Services713
- Understanding MPLS Vpns714
- Configuring MPLS Vpns718
- Understanding Eompls724
  - Interaction with Other Features725
  - Eompls Limitations726
- Enabling Eompls727
- Configuring MPLS and Eompls Qos730
  - Understanding MPLS Qos730
  - Enabling MPLS and Eompls Qos732
    - Default MPLS and Eompls Qos Configuration732
    - Setting the Priority of Packets with Experimental Bits732
- Monitoring and Maintaining MPLS and Eompls734
Chapter 31 Configuring IP Multicast Routing735
- Understanding Cisco's Implementation of IP Multicast Routing736
- Configuring IP Multicast Routing742
- Configuring Advanced PIM Features756
- Configuring Optional IGMP Features760
- Configuring Optional Multicast Routing Features765
- Configuring Basic DVMRP Interoperability Features770
- Configuring Advanced DVMRP Interoperability Features775
- Monitoring and Maintaining IP Multicast Routing783
Chapter 32 Configuring MSDP787
- Understanding MSDP787
  - MSDP Operation788
  - MSDP Benefits789
- Configuring MSDP790
- Monitoring and Maintaining MSDP805
Chapter 33 Configuring Fallback Bridging807
- Understanding Fallback Bridging807
- Configuring Fallback Bridging808
Chapter 34 Troubleshooting817
- Recovering from Corrupted Software by Using the XMODEM Protocol818
- Recovering from a Lost or Forgotten Password819
  - Procedure with Password Recovery Enabled820
  - Procedure with Password Recovery Disabled822
- Preventing Autonegotiation Mismatches823
- SFP Module Security and Identification824
- Using Ping824
  - Understanding Ping824
  - Executing Ping825
- Using Layer 2 Traceroute826
- Using IP Traceroute827
  - Understanding IP Traceroute827
  - Executing IP Traceroute828
- Using Debug Commands829
- Using the Show Platform Forward Command830
- Using the Crashinfo File833
Supported Mibs835
- MIB List835
- Using FTP to Access the MIB Files837
Appendix839
Working with the Cisco IOS File System, Configuration Files, and Software Images839
- Working with the Flash File System839
- Working with Configuration Files846
- Working with Software Images857
  - Image Location on the Switch857
  - Tar File Format of Images on a Server or Cisco.com857
Appendix871
Unsupported Commands in Cisco IOS Release12.1(14)AX871
- Access Control Lists871
  - Unsupported Privileged EXEC Commands871
  - Unsupported Global Configuration Commands871
- Arp871
- Hsrp874
Mpls879
Msdp879
- Unsupported Privileged EXEC Commands879
- Radius879
Snmp880
- Unsupported Global Configuration Commands880
- Spanning Tree880
  - Unsupported Interface Configuration Commands880
- Virtual Forwarding Infrastructure (VFI880
  - Unsupported Privileged EXEC Commands880
Vlan880
- Unsupported Vlan-Config Commands880
- Unsupported Privileged EXEC Commands881
- Unsupported User EXEC Commands881
Vtp881
I N D E X883

Cisco Catalyst 3750 - Where to Go Next

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