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All in one cisco CCIE lab study guide
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Table of Contents
All−in−One Cisco CCIE Lab Study Guide, Second Edition...........................................................................1
Chapter 1: Take the Lab Once and Pass..........................................................................................................3
Overview..................................................................................................................................................3
CCIE Lab Exams.....................................................................................................................................3
CCIE Routing and Switching Lab Locations....................................................................................3
Format of the Book..................................................................................................................................4
Chapter Format........................................................................................................................................4
Lab Format...............................................................................................................................................5
CD−ROM.................................................................................................................................................5
Chapter 2: Terminal Servers.............................................................................................................................6
Overview..................................................................................................................................................6
Introduction..............................................................................................................................................6
Out−of−Band Network Management................................................................................................6
Commands Discussed in This Chapter....................................................................................................7
Definitions.........................................................................................................................................7
Lab #1: Basic Terminal Server Configuration.........................................................................................7
Equipment Needed............................................................................................................................7
Connecting the Terminal Server........................................................................................................7
Basic Terminal Server Configuration................................................................................................7
Terminal Server Configuration.........................................................................................................8
Connecting to a Port..........................................................................................................................9
Mapping a Host Name to an IP Address...........................................................................................9
Absolute Versus Relative Line Numbers..........................................................................................9
Exiting a Reverse Telnet Session....................................................................................................10
Troubleshooting.....................................................................................................................................11
Displaying Active Sessions.............................................................................................................11
Switching Between Sessions...........................................................................................................11
Disconnecting a Session..................................................................................................................12
Clearing a Line................................................................................................................................12
Displaying the Status of a Line.......................................................................................................12
Conclusion.............................................................................................................................................13
Chapter 3: ISDN...............................................................................................................................................14
Overview................................................................................................................................................14
Introduction............................................................................................................................................14
ISDN Technology Overview.................................................................................................................14
ISDN Switches.......................................................................................................................................15
ISDN BRI........................................................................................................................................16
ISDN PRI........................................................................................................................................17
ISDN Bearer Capability..................................................................................................................17
The ISDN Protocol Stack................................................................................................................17
Layer 2 Link Layer Establishment..................................................................................................19
Layer 2 Link Layer Status Checks..................................................................................................21
ISDN Layer 3 Signaling..................................................................................................................22
ISDN Configuration........................................................................................................................27
ISDN with Non−ISDN−Equipped Routers.....................................................................................27
Commands Discussed in This Chapter..................................................................................................28
Definitions.......................................................................................................................................28
IOS Requirements..................................................................................................................................30
ISDN Switch Configuration............................................................................................................30
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Table of Contents
Chapter 3: ISDN
Lab #2: ISDN Basics and Switch Basics...............................................................................................32
Equipment Needed..........................................................................................................................32
Configuration Overview..................................................................................................................32
ISDN Switch Setup.........................................................................................................................32
Router Configuration.......................................................................................................................32
RouterA...........................................................................................................................................32
RouterB...........................................................................................................................................33
Monitoring and Testing the Configuration......................................................................................34
Lab #3: Backup Interfaces.....................................................................................................................38
Equipment Needed..........................................................................................................................38
Configuration Overview..................................................................................................................38
ISDN Switch Setup.........................................................................................................................39
Router Configuration.......................................................................................................................39
RouterA...........................................................................................................................................39
Router B..........................................................................................................................................40
Monitoring and Testing the Configuration......................................................................................41
Router A Configuration for interface S0/0......................................................................................47
Lab #4: Floating Static Routes...............................................................................................................49
Equipment Needed..........................................................................................................................49
Configuration Overview..................................................................................................................50
ISDN Switch Setup.........................................................................................................................50
Router Configuration.......................................................................................................................50
RouterA...........................................................................................................................................50
RouterB...........................................................................................................................................51
Monitoring and Testing the Configuration......................................................................................52
Lab #5: Dialer Profiles...........................................................................................................................61
Equipment Needed..........................................................................................................................61
Configuration Overview..................................................................................................................61
ISDN Switch Setup.........................................................................................................................61
Router Configuration.......................................................................................................................61
RouterA...........................................................................................................................................61
RouterB...........................................................................................................................................62
Monitoring and Testing the Configuration......................................................................................63
Lab #6: ISDN BRI to ISDN PRI...........................................................................................................67
Equipment Needed..........................................................................................................................67
Configuration Overview..................................................................................................................67
ISDN Switch Setup.........................................................................................................................67
Router Configuration.......................................................................................................................67
RouterA...........................................................................................................................................67
RouterB...........................................................................................................................................68
Monitoring and Testing the Configuration......................................................................................69
Lab #7: Snapshot Routing......................................................................................................................77
Equipment Needed..........................................................................................................................77
Configuration Overview..................................................................................................................77
ISDN Switch Setup.........................................................................................................................77
Router Configuration.......................................................................................................................78
RouterA...........................................................................................................................................78
RouterB...........................................................................................................................................79
Monitoring and Testing the Configuration......................................................................................79
Lab #8: OSPF Demand Circuits............................................................................................................82
Equipment Needed..........................................................................................................................82
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Table of Contents
Chapter 3: ISDN
Configuration Overview..................................................................................................................83
ISDN Switch Setup.........................................................................................................................83
Router Configuration.......................................................................................................................83
RouterA...........................................................................................................................................83
RouterB...........................................................................................................................................84
Monitoring and Testing the Configuration......................................................................................85
Lab #9: PPP Callback............................................................................................................................89
Equipment Needed..........................................................................................................................89
Configuration Overview..................................................................................................................89
ISDN Switch Setup.........................................................................................................................89
Router Configuration.......................................................................................................................89
RouterA...........................................................................................................................................89
RouterB...........................................................................................................................................90
Monitoring and Testing the Configuration......................................................................................91
Lab #10: Dialer Watch...........................................................................................................................94
Equipment Needed..........................................................................................................................94
Configuration Overview..................................................................................................................94
ISDN Switch Setup.........................................................................................................................95
Router Configuration.......................................................................................................................95
RouterA...........................................................................................................................................95
RouterB...........................................................................................................................................96
Monitoring and Testing the Configuration......................................................................................97
Lab #11: ISDN Troubleshooting...........................................................................................................99
Equipment Needed........................................................................................................................100
Configuration Overview................................................................................................................100
ISDN Switch Setup.......................................................................................................................100
Router Configuration.....................................................................................................................100
RouterA.........................................................................................................................................100
RouterB.........................................................................................................................................101
Monitoring and Testing the Configuration....................................................................................102
Conclusion...........................................................................................................................................114
Chapter 4: Frame Relay.................................................................................................................................115
Overview..............................................................................................................................................115
Introduction..........................................................................................................................................115
Frame Relay Technology Overview....................................................................................................115
The Justification for Frame Relay.................................................................................................115
What Is Frame Relay...........................................................................................................................116
Frame Relay Terminology.............................................................................................................117
Frame Relay Addressing...............................................................................................................117
Frame Relay Frame Format...........................................................................................................118
Frame Relay Congestion Control..................................................................................................120
Frame Relay Error Handling.........................................................................................................120
Frame Relay Class of Service.......................................................................................................120
Local Management Interface.........................................................................................................121
Status Request from the Router to the Frame Relay Switch.........................................................122
Status Reply from the Frame Relay Switch to Router..................................................................123
Full Status Request from the Router to the Frame Relay Switch..................................................123
Full Status Reply from the Frame Relay Switch to the Router.....................................................124
Asynchronous Status Updates.......................................................................................................124
Status Request from the Router to the Frame Relay Switch.........................................................125
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Table of Contents
Chapter 4: Frame Relay
Status Reply from the Frame Relay Switch to the Router............................................................125
Asynchronous Update from the Frame Relay Switch to the Router.............................................126
Status Request from the Router to the Frame Relay Switch.........................................................126
Inverse Address Resolution Protocol (Inverse ARP)...........................................................................127
Inverse ARP Request.....................................................................................................................127
Inverse ARP Reply........................................................................................................................128
Cisco Frame Relay Capabilities...........................................................................................................128
Frame Relay Switching.................................................................................................................129
IETF and Cisco Encapsulation......................................................................................................129
Traffic Shaping..............................................................................................................................130
DE Support....................................................................................................................................131
BECN Support...............................................................................................................................131
Payload Compression....................................................................................................................131
LMI Autosense..............................................................................................................................131
Commands Discussed in This Chapter................................................................................................131
Definitions.....................................................................................................................................132
IOS Requirements................................................................................................................................133
Lab #12: Configuring a Cisco Routeras a Frame Relay Switch..........................................................133
Equipment Needed........................................................................................................................134
Configuration Overview................................................................................................................134
Router Configuration.....................................................................................................................134
RouterA (Frame Relay DTE)........................................................................................................134
RouterB (Frame Relay DTE)........................................................................................................135
FrameSwitch (Frame Relay Switch).............................................................................................135
Monitoring and Testing the Configuration....................................................................................137
Lab #13: Configuring LMI Autosense.................................................................................................141
Equipment Needed........................................................................................................................141
Configuration Overview................................................................................................................141
Router Configuration.....................................................................................................................141
Frameswitch..................................................................................................................................141
Router B........................................................................................................................................142
Monitoring and Testing the Configuration....................................................................................142
Demonstrating the Configuration..................................................................................................144
Annex D Request from RouterB to FrameSwitch.........................................................................144
Annex A Request from RouterB to FrameSwitch.........................................................................145
Cisco LMI Request from RouterB to FrameSwitch......................................................................145
FrameSwitch Response to RouterB Cisco LMI Status Request....................................................146
Lab #14: Configuring Cisco Discard Eligibility Support....................................................................146
Equipment Needed........................................................................................................................146
Configuration Overview................................................................................................................146
Router Configuration.....................................................................................................................147
FrameSwitch (Frame Relay Switch).............................................................................................147
RouterA (Frame Relay DTE)........................................................................................................148
RouterB (Frame Relay DTE)........................................................................................................148
Monitoring and Testing the Configuration....................................................................................148
Lab #15: Frame Relay Map Statements...............................................................................................153
Equipment Needed........................................................................................................................153
Configuration Overview................................................................................................................153
Router Configuration.....................................................................................................................153
FrameSwitch (Frame Relay Switch).............................................................................................153
RouterA (Frame Relay DTE)........................................................................................................154
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Table of Contents
Chapter 4: Frame Relay
RouterB (Frame Relay DTE)........................................................................................................155
Monitoring and Testing the Configuration....................................................................................155
Lab #16: Full Connectivity witha Partial PVC Mesh and FrameRelay Map Statements....................159
Equipment Needed........................................................................................................................159
Configuration Overview................................................................................................................159
Router Configuration.....................................................................................................................160
FrameSwitch (Frame Relay Switch).............................................................................................160
RouterA (Frame Relay DTE)........................................................................................................161
RouterB (Frame Relay DTE)........................................................................................................161
RouterC (Frame Relay DTE)........................................................................................................162
Monitoring and Testing the Configuration....................................................................................162
Lab #16: Full Connectivity witha Partial PVC Mesh and FrameRelay Map Statements....................167
Equipment Needed........................................................................................................................167
Configuration Overview................................................................................................................168
Router Configuration.....................................................................................................................168
FrameSwitch (Frame Relay Switch).............................................................................................168
RouterA (Frame Relay DTE)........................................................................................................169
RouterB (Frame Relay DTE)........................................................................................................169
RouterC (Frame Relay DTE)........................................................................................................170
Monitoring and Testing the Configuration....................................................................................170
Lab #17: Full Connectivity with a Partial PVC Mesh and Subinterfaces............................................176
Equipment Needed........................................................................................................................176
Configuration Overview................................................................................................................176
Router Configuration.....................................................................................................................177
FrameSwitch (Frame Relay Switch).............................................................................................177
RouterA (Frame Relay DTE)........................................................................................................177
RouterB (Frame Relay DTE)........................................................................................................178
RouterC (Frame Relay DTE)........................................................................................................178
Monitoring and Testing the Configuration....................................................................................179
Lab #18: Frame Relay Traffic Shaping...............................................................................................184
Equipment Needed........................................................................................................................184
Configuration Overview................................................................................................................184
Router Configuration.....................................................................................................................184
FrameSwitch (Frame Relay Switch).............................................................................................184
RouterA (Frame Relay DTE)........................................................................................................185
RouterB (Frame Relay DTE)........................................................................................................185
Monitoring and Testing the Configuration....................................................................................186
Lab #19: Monitoring and Troubleshooting Frame Relay Connections...............................................190
Equipment Needed........................................................................................................................190
Configuration Overview................................................................................................................190
Router Configuration.....................................................................................................................190
FrameSwitch (Frame Relay Switch).............................................................................................190
RouterA (Frame Relay DTE)........................................................................................................191
RouterB (Frame Relay DTE)........................................................................................................191
Monitoring and Testing the Configuration....................................................................................192
Conclusion...........................................................................................................................................196
Chapter 5: Asynchronous Transfer Mode (ATM).......................................................................................197
Overview..............................................................................................................................................197
Introduction..........................................................................................................................................197
ATM Overview.............................................................................................................................197
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Table of Contents
Chapter 5: Asynchronous Transfer Mode (ATM)
ATM Protocol Stack......................................................................................................................198
ATM Cell Basic Format................................................................................................................199
ATM Cell Header..........................................................................................................................199
ATM Addressing...........................................................................................................................200
Components of an ATM Network.................................................................................................200
ATM Physical Interfaces...............................................................................................................201
ATM Call Types............................................................................................................................201
ATM Switching Operation............................................................................................................201
ATM Classes of Service................................................................................................................202
ATM Quality of Service (QOS)....................................................................................................202
ATM with a Non−ATM Device....................................................................................................202
ATM LANE..................................................................................................................................203
Cisco ATM Capabilities................................................................................................................204
Commands Discussed in This Chapter................................................................................................204
Definitions.....................................................................................................................................205
IOS Requirements................................................................................................................................205
Lab #20: ATM Configuration on a Cisco 4500...................................................................................206
Equipment Needed........................................................................................................................206
Configuration Overview................................................................................................................206
Router Configuration.....................................................................................................................206
RouterA.........................................................................................................................................206
RouterB.........................................................................................................................................207
Monitoring and Testing the Configuration....................................................................................207
Lab #21: ATM Loopbacks on a Cisco 4500........................................................................................210
Equipment Needed........................................................................................................................210
Configuration Overview................................................................................................................210
Router Configuration.....................................................................................................................211
RouterA.........................................................................................................................................212
RouterB.........................................................................................................................................212
Monitoring and Testing the Configuration Loopback Diagnostic................................................213
Loopback Line...............................................................................................................................216
Lab #22: ATM LANE..........................................................................................................................218
Equipment Needed........................................................................................................................218
Configuration Overview................................................................................................................218
Router and Switch Configuration..................................................................................................218
RouterA.........................................................................................................................................219
RouterB.........................................................................................................................................219
LS1010..........................................................................................................................................220
Monitoring and Testing the Configuration....................................................................................221
Troubleshooting ATM...................................................................................................................223
Conclusion...........................................................................................................................................224
Chapter 6: Routing Information Protocol....................................................................................................225
Overview..............................................................................................................................................225
Introduction..........................................................................................................................................225
Technology Overview..........................................................................................................................225
Routing Loops...............................................................................................................................226
RIP Message Format.....................................................................................................................228
Commands Discussed in This Chapter................................................................................................228
Definitions.....................................................................................................................................229
IOS Requirements................................................................................................................................229
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Table of Contents
Chapter 6: Routing Information Protocol
Lab #23: Basic RIP Configuration.......................................................................................................229
Equipment Needed........................................................................................................................229
Configuration Overview................................................................................................................230
Router Configurations...................................................................................................................230
RouterA.........................................................................................................................................230
RouterB.........................................................................................................................................231
RouterC.........................................................................................................................................231
Monitoring and Testing the Configuration....................................................................................232
Lab #24: Passive Interface Configuration............................................................................................233
Equipment Needed........................................................................................................................233
Configuration Overview................................................................................................................233
Router Configurations...................................................................................................................234
RouterA.........................................................................................................................................234
RouterB.........................................................................................................................................234
RouterC.........................................................................................................................................235
Monitoring and Testing the Configuration....................................................................................235
Lab #25: RIP Timer Configurations....................................................................................................236
Equipment Needed........................................................................................................................236
Configuration Overview................................................................................................................236
Router Configurations...................................................................................................................237
RouterA.........................................................................................................................................237
RouterB.........................................................................................................................................238
RouterC.........................................................................................................................................239
Monitoring and Testing the Configuration....................................................................................239
Lab #26: Configuring Unicast RIP Updates........................................................................................241
Equipment Needed........................................................................................................................241
Router Configurations...................................................................................................................241
RouterA.........................................................................................................................................241
Monitoring and Testing the Configuration....................................................................................242
Lab #27: RIP and Discontiguous Networks.........................................................................................242
Equipment Needed........................................................................................................................242
Router Configurations...................................................................................................................243
RouterA.........................................................................................................................................243
RouterB.........................................................................................................................................243
Monitoring and Testing the Configuration....................................................................................244
Troubleshooting RIP.....................................................................................................................245
Conclusion...........................................................................................................................................246
Chapter 7: Interior Gateway Routing Protocol...........................................................................................248
Overview..............................................................................................................................................248
Introduction..........................................................................................................................................248
Technology Overview..........................................................................................................................248
Routing Loops...............................................................................................................................248
Split Horizon.................................................................................................................................248
Poison Reverse..............................................................................................................................249
Holddown......................................................................................................................................249
Flash Updates................................................................................................................................250
IGRP Routes..................................................................................................................................250
Commands Discussed in This Chapter................................................................................................250
Definitions.....................................................................................................................................250
IOS Requirements................................................................................................................................251
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Table of Contents
Chapter 7: Interior Gateway Routing Protocol
Lab #28: Basic IGRP Configuration....................................................................................................251
Equipment Needed........................................................................................................................251
Configuration Overview................................................................................................................252
Router Configurations...................................................................................................................252
RouterA.........................................................................................................................................252
RouterB.........................................................................................................................................252
RouterC.........................................................................................................................................253
Monitoring and Testing the Configuration....................................................................................254
Lab #28: Basic IGRP Configuration....................................................................................................255
Equipment Needed........................................................................................................................255
Configuration Overview................................................................................................................255
Router Configurations...................................................................................................................256
RouterA.........................................................................................................................................256
RouterB.........................................................................................................................................256
RouterC.........................................................................................................................................257
Monitoring and Testing the Configuration....................................................................................257
Lab #29: Passive Interface Configuration............................................................................................259
Equipment Needed........................................................................................................................259
Configuration Overview................................................................................................................259
Router Configurations...................................................................................................................260
RouterA.........................................................................................................................................260
RouterB.........................................................................................................................................261
RouterC.........................................................................................................................................261
Monitoring and Testing the Configuration....................................................................................262
Lab #30: IGRP Unequal−Cost Load Balancing..................................................................................263
Equipment Needed........................................................................................................................263
Overview.......................................................................................................................................263
Configuration Overview................................................................................................................264
Router Configurations...................................................................................................................264
RouterA.........................................................................................................................................264
RouterB.........................................................................................................................................265
RouterC.........................................................................................................................................265
Monitoring and Testing the Configuration....................................................................................266
Lab #31: IGRP Timer Configurations.................................................................................................267
Equipment Needed........................................................................................................................267
Configuration Overview................................................................................................................267
Router Configurations...................................................................................................................268
RouterA.........................................................................................................................................268
RouterB.........................................................................................................................................269
RouterC.........................................................................................................................................270
Monitoring and Testing the Configuration....................................................................................270
Lab #32: Configuring Unicast IGRP Updates.....................................................................................271
Equipment Needed........................................................................................................................271
Router Configurations...................................................................................................................271
RouterA.........................................................................................................................................271
Monitoring and Testing the Configuration....................................................................................272
Troubleshooting IGRP.........................................................................................................................272
Conclusion...........................................................................................................................................274
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Table of Contents
Chapter 8: OSPF.............................................................................................................................................275
Overview..............................................................................................................................................275
Introduction..........................................................................................................................................275
OSPF Terminology..............................................................................................................................275
Technology Overview..........................................................................................................................276
Link State Routing Protocol..........................................................................................................276
Flooding.........................................................................................................................................277
Dijkstra Algorithm........................................................................................................................277
Areas..............................................................................................................................................277
Backbone Area 0...........................................................................................................................277
Designated Router (DR)................................................................................................................278
OSPF Protocol Packets..................................................................................................................278
Link State Advertisements............................................................................................................279
Router Link....................................................................................................................................279
Network Link................................................................................................................................280
Summary Link...............................................................................................................................280
External Link.................................................................................................................................280
How It Works................................................................................................................................280
How an Adjacency Is Formed.......................................................................................................281
Sniffer Trace of Database Synchronization...................................................................................282
OSPF Network Types..........................................................................................................................287
Broadcast.......................................................................................................................................287
Non−Broadcast..............................................................................................................................288
Point−to−Point..............................................................................................................................289
Point−to−Multipoint......................................................................................................................289
Commands Discussed in This Chapter................................................................................................289
Definitions.....................................................................................................................................290
IOS Requirements................................................................................................................................292
Lab #33: Basic OSPF Configuration...................................................................................................292
Equipment Needed........................................................................................................................292
Configuration Overview................................................................................................................292
Enabling OSPF..............................................................................................................................292
Router Configurations...................................................................................................................293
RouterA.........................................................................................................................................293
RouterB.........................................................................................................................................293
Monitoring and Testing the Configuration....................................................................................294
Lab #34: Configuring OSPF Priority "DR Election"...........................................................................296
Equipment Needed........................................................................................................................296
Configuration Overview................................................................................................................296
Router Configurations...................................................................................................................296
RouterA.........................................................................................................................................296
RouterB.........................................................................................................................................297
RouterC.........................................................................................................................................298
RouterD.........................................................................................................................................298
Monitoring and Testing the Configuration....................................................................................299
Lab #35: Configuring OSPF Virtual Links..........................................................................................300
Equipment Needed........................................................................................................................300
Configuration Overview................................................................................................................301
Router Configurations...................................................................................................................301
RouterA.........................................................................................................................................301
RouterB.........................................................................................................................................302
RouterC.........................................................................................................................................302
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Table of Contents
Chapter 8: OSPF
Monitoring and Testing the Configuration....................................................................................303
Lab #36: Configuring OSPF Neighbor Authentication.......................................................................305
Equipment Needed........................................................................................................................305
Overview.......................................................................................................................................305
Configuration Overview................................................................................................................305
Router Configurations...................................................................................................................306
RouterA.........................................................................................................................................306
RouterB.........................................................................................................................................307
RouterC.........................................................................................................................................308
Monitoring and Testing the Configuration....................................................................................308
Lab #37: Configuring OSPF on NBMA Network "Non−Broadcast Model"......................................309
Equipment Needed........................................................................................................................309
Overview.......................................................................................................................................309
Configuration Overview................................................................................................................310
Router Configurations...................................................................................................................310
FrameSwitch..................................................................................................................................310
RouterA.........................................................................................................................................311
RouterB.........................................................................................................................................312
RouterC.........................................................................................................................................312
Monitoring and Testing the Configuration....................................................................................313
Lab #38: Configuring OSPF on NBMA Network "Broadcast Model"...............................................316
Equipment Needed........................................................................................................................316
Overview.......................................................................................................................................316
Configuration Overview................................................................................................................316
Router Configurations...................................................................................................................316
FrameSwitch..................................................................................................................................317
RouterA.........................................................................................................................................317
RouterB.........................................................................................................................................318
RouterC.........................................................................................................................................319
Monitoring and Testing the Configuration....................................................................................320
Lab #39: Configuring OSPF on NBMA Network "Point−to−Multipoint Model"..............................322
Equipment Needed........................................................................................................................322
Overview.......................................................................................................................................322
Configuration Overview................................................................................................................322
Router Configurations...................................................................................................................323
FrameSwitch..................................................................................................................................323
RouterA.........................................................................................................................................324
RouterB.........................................................................................................................................324
RouterC.........................................................................................................................................325
Monitoring and Testing the Configuration....................................................................................326
Lab #40: Configure OSPF Interface Parameters.................................................................................326
Equipment Needed........................................................................................................................326
Overview.......................................................................................................................................327
Configuration Overview................................................................................................................327
Router Configurations...................................................................................................................327
RouterA.........................................................................................................................................327
RouterB.........................................................................................................................................328
RouterC.........................................................................................................................................329
Monitoring and Testing the Configuration....................................................................................329
Lab #41: Inter−Area and External Route Summarization...................................................................331
Equipment Needed........................................................................................................................331
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Table of Contents
Chapter 8: OSPF
Overview.......................................................................................................................................332
Configuration Overview................................................................................................................332
Router Configurations...................................................................................................................332
RouterA.........................................................................................................................................332
RouterB.........................................................................................................................................333
RouterC.........................................................................................................................................334
RouterD.........................................................................................................................................334
RouterE..........................................................................................................................................335
Monitoring and Testing the Configuration....................................................................................335
Lab #42: Regular, Stub, Totally Stub, and NSSA Areas.....................................................................338
Equipment Needed........................................................................................................................338
Overview.......................................................................................................................................338
Configuration Overview................................................................................................................338
Router Configurations...................................................................................................................339
RouterA.........................................................................................................................................339
RouterB.........................................................................................................................................340
RouterC.........................................................................................................................................340
RouterD.........................................................................................................................................341
RouterE..........................................................................................................................................341
Monitoring and Testing the Configuration....................................................................................342
Troubleshooting OSPF........................................................................................................................345
Conclusion...........................................................................................................................................348
Chapter 9: Enhanced Interior Gateway Routing Protocol.........................................................................349
Overview..............................................................................................................................................349
Introduction..........................................................................................................................................349
EIGRP Terminology......................................................................................................................349
Technology Overview..........................................................................................................................351
EIGRP Metrics..............................................................................................................................351
IOS Requirements................................................................................................................................353
Commands Discussed in This Chapter................................................................................................353
Definitions.....................................................................................................................................354
Lab #43: Basic EIGRP Configuration.................................................................................................355
Equipment Needed........................................................................................................................355
Configuration Overview................................................................................................................355
Router Configurations...................................................................................................................355
RouterA.........................................................................................................................................355
RouterB.........................................................................................................................................356
RouterC.........................................................................................................................................356
Monitoring and Testing the Configuration....................................................................................357
Lab #44: Passive Interface Configuration............................................................................................360
Equipment Needed........................................................................................................................360
Configuration Overview................................................................................................................361
Router Configurations...................................................................................................................361
RouterA.........................................................................................................................................361
RouterB.........................................................................................................................................362
RouterC.........................................................................................................................................362
Monitoring and Testing the Configuration....................................................................................363
Lab #45: EIGRP Unequal−Cost Load Balancing................................................................................365
Equipment Needed........................................................................................................................365
Overview.......................................................................................................................................365
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Table of Contents
Chapter 9: Enhanced Interior Gateway Routing Protocol
Configuration Overview................................................................................................................365
Router Configurations...................................................................................................................366
RouterA.........................................................................................................................................366
RouterB.........................................................................................................................................366
RouterC.........................................................................................................................................367
Monitoring and Testing the Configuration....................................................................................367
Lab #46: EIGRP Timer Configuration................................................................................................369
Equipment Needed........................................................................................................................369
Overview.......................................................................................................................................369
Configuration Overview................................................................................................................370
Router Configurations...................................................................................................................370
RouterA.........................................................................................................................................370
RouterB.........................................................................................................................................371
Monitoring and Testing the Configuration....................................................................................371
Lab #47: Configuring EIGRP on an NBMA Network........................................................................372
Equipment Needed........................................................................................................................372
Overview.......................................................................................................................................373
Configuration Overview................................................................................................................373
Router Configurations...................................................................................................................373
FrameSwitch..................................................................................................................................373
RouterA.........................................................................................................................................374
RouterB.........................................................................................................................................375
RouterC.........................................................................................................................................375
Monitoring and Testing the Configuration....................................................................................376
Troubleshooting EIGRP................................................................................................................377
Conclusion...........................................................................................................................................378
Chapter 10: Border Gateway Protocol (BGP).............................................................................................380
Overview..............................................................................................................................................380
Introduction..........................................................................................................................................380
BGP Terminology.........................................................................................................................381
Technology Overview...................................................................................................................382
BGP Neighbor Negotiation...........................................................................................................383
BGP Message Format....................................................................................................................384
Open Message Format...................................................................................................................384
Update Message Format................................................................................................................385
KeepAlive Message Format..........................................................................................................388
Notification Message Format........................................................................................................388
Commands Discussed in This Chapter................................................................................................389
Definitions.....................................................................................................................................390
IOS Requirements.........................................................................................................................392
Lab #48: BGP Configuration...............................................................................................................392
Equipment Needed........................................................................................................................392
Configuration Overview................................................................................................................393
Router Configurations...................................................................................................................393
RouterA.........................................................................................................................................393
RouterB.........................................................................................................................................394
RouterC.........................................................................................................................................394
Monitoring and Testing the Configuration....................................................................................395
BGP Summarization......................................................................................................................398
BGP Aggregation..........................................................................................................................399
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Table of Contents
Chapter 10: Border Gateway Protocol (BGP)
Router Configurations...................................................................................................................400
RouterA.........................................................................................................................................400
RouterB.........................................................................................................................................401
RouterD.........................................................................................................................................401
Lab #49: BGP Route Reflectors..........................................................................................................403
Equipment Needed........................................................................................................................403
Route Reflector Overview.............................................................................................................403
Configuration Overview................................................................................................................404
Router Configurations...................................................................................................................404
RouterA.........................................................................................................................................404
RouterB.........................................................................................................................................405
RouterC.........................................................................................................................................406
RouterD.........................................................................................................................................406
Monitoring and Testing the Configuration....................................................................................407
Lab #50: Manipulating BGP Path Selection........................................................................................409
Equipment Needed........................................................................................................................409
BGP Path Selection Overview......................................................................................................409
Configuration Overview................................................................................................................410
Router Configurations...................................................................................................................410
RouterA.........................................................................................................................................410
RouterB.........................................................................................................................................411
RouterC.........................................................................................................................................411
RouterD.........................................................................................................................................412
Monitoring and Testing the Configuration....................................................................................413
Local Preference Attribute............................................................................................................414
The Multi−Exit Discriminator (MED) Attribute...........................................................................415
AS Path Manipulation...................................................................................................................417
Route Filtering Based on Network Number..................................................................................418
BGP Soft Configuration................................................................................................................418
Regular Expressions......................................................................................................................419
Filtering Based on AS Path...........................................................................................................419
Lab #51: BGP Confederations.............................................................................................................421
Equipment Needed........................................................................................................................421
Configuration Overview................................................................................................................421
Router Configurations...................................................................................................................423
RouterA.........................................................................................................................................423
RouterB.........................................................................................................................................423
RouterC.........................................................................................................................................424
RouterD.........................................................................................................................................425
RouterE..........................................................................................................................................425
Monitoring and Testing the Configuration....................................................................................426
Lab #52: BGP Communities................................................................................................................428
Equipment Needed........................................................................................................................428
Configuration Overview................................................................................................................428
Router Configurations...................................................................................................................429
RouterA.........................................................................................................................................429
RouterB.........................................................................................................................................429
RouterC.........................................................................................................................................430
RouterD.........................................................................................................................................431
RouterE..........................................................................................................................................432
Monitoring and Testing the Configuration....................................................................................432
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Table of Contents
Chapter 10: Border Gateway Protocol (BGP)
Lab #53: BGP Backdoor Links............................................................................................................435
Equipment Needed........................................................................................................................435
Configuration Overview................................................................................................................436
Router Configurations...................................................................................................................436
RouterA.........................................................................................................................................437
RouterB.........................................................................................................................................437
RouterC.........................................................................................................................................438
RouterD.........................................................................................................................................439
RouterE..........................................................................................................................................439
Monitoring and Testing the Configuration....................................................................................440
Troubleshooting BGP....................................................................................................................441
Conclusion...........................................................................................................................................442
Chapter 11: Route Redistribution.................................................................................................................443
Overview..............................................................................................................................................443
Introduction..........................................................................................................................................443
Commands Discussed in This Chapter................................................................................................443
Definitions.....................................................................................................................................443
IOS Requirements.........................................................................................................................444
Lab #54: Redistributing RIP and IGRP...............................................................................................444
Equipment Needed........................................................................................................................444
Configuration Overview................................................................................................................444
Router Configurations...................................................................................................................444
RouterA.........................................................................................................................................444
RouterB.........................................................................................................................................445
RouterC.........................................................................................................................................446
RouterD.........................................................................................................................................446
Monitoring and Testing the Configuration....................................................................................447
Lab #55: Redistributing IGRP and EIGRP..........................................................................................451
Equipment Needed........................................................................................................................451
Configuration Overview................................................................................................................451
Router Configurations...................................................................................................................452
RouterA.........................................................................................................................................452
RouterB.........................................................................................................................................452
RouterC.........................................................................................................................................453
RouterD.........................................................................................................................................453
Monitoring and Testing the Configuration....................................................................................454
Lab #56: Redistributing RIP and OSPF...............................................................................................455
Equipment Needed........................................................................................................................455
Configuration Overview................................................................................................................456
Router Configurations...................................................................................................................456
RouterA.........................................................................................................................................456
RouterB.........................................................................................................................................457
RouterC.........................................................................................................................................457
RouterD.........................................................................................................................................458
Monitoring and Testing the Configuration....................................................................................458
Lab #57: Redistributing IGRP and OSPF............................................................................................463
Equipment Needed........................................................................................................................463
Configuration Overview................................................................................................................463
Router Configurations...................................................................................................................463
RouterA.........................................................................................................................................463
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