Table of ContentsAllinOne Cisco CCIE Lab Study Guide, Second Edition...........................................................................1

Chapter 1: Take the Lab Once and Pass..........................................................................................................3Overview..................................................................................................................................................3CCIE Lab Exams.....................................................................................................................................3

CCIE Routing and Switching Lab Locations....................................................................................3Format of the Book..................................................................................................................................4Chapter Format........................................................................................................................................4Lab Format...............................................................................................................................................5CDROM.................................................................................................................................................5

Chapter 2: Terminal Servers.............................................................................................................................6Overview..................................................................................................................................................6Introduction..............................................................................................................................................6

OutofBand Network Management................................................................................................6Commands Discussed in This Chapter....................................................................................................7

Definitions.........................................................................................................................................7Lab #1: Basic Terminal Server Configuration.........................................................................................7

Equipment Needed............................................................................................................................7Connecting the Terminal Server........................................................................................................7Basic Terminal Server Configuration................................................................................................7Terminal Server Configuration.........................................................................................................8Connecting to a Port..........................................................................................................................9Mapping a Host Name to an IP Address...........................................................................................9Absolute Versus Relative Line Numbers..........................................................................................9Exiting a Reverse Telnet Session....................................................................................................10

Troubleshooting.....................................................................................................................................11Displaying Active Sessions.............................................................................................................11Switching Between Sessions...........................................................................................................11Disconnecting a Session..................................................................................................................12Clearing a Line................................................................................................................................12Displaying the Status of a Line.......................................................................................................12

Conclusion.............................................................................................................................................13

Chapter 3: ISDN...............................................................................................................................................14Overview................................................................................................................................................14Introduction............................................................................................................................................14ISDN Technology Overview.................................................................................................................14ISDN Switches.......................................................................................................................................15

ISDN BRI........................................................................................................................................16ISDN PRI........................................................................................................................................17ISDN Bearer Capability..................................................................................................................17The ISDN Protocol Stack................................................................................................................17Layer 2 Link Layer Establishment..................................................................................................19Layer 2 Link Layer Status Checks..................................................................................................21ISDN Layer 3 Signaling..................................................................................................................22ISDN Configuration........................................................................................................................27ISDN with NonISDNEquipped Routers.....................................................................................27

Commands Discussed in This Chapter..................................................................................................28Definitions.......................................................................................................................................28

IOS Requirements..................................................................................................................................30ISDN Switch Configuration............................................................................................................30

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Table of ContentsChapter 3: ISDN

Lab #2: ISDN Basics and Switch Basics...............................................................................................32Equipment Needed..........................................................................................................................32Configuration Overview..................................................................................................................32ISDN Switch Setup.........................................................................................................................32Router Configuration.......................................................................................................................32RouterA...........................................................................................................................................32RouterB...........................................................................................................................................33Monitoring and Testing the Configuration......................................................................................34

Lab #3: Backup Interfaces.....................................................................................................................38Equipment Needed..........................................................................................................................38Configuration Overview..................................................................................................................38ISDN Switch Setup.........................................................................................................................39Router Configuration.......................................................................................................................39RouterA...........................................................................................................................................39Router B..........................................................................................................................................40Monitoring and Testing the Configuration......................................................................................41Router A Configuration for interface S0/0......................................................................................47

Lab #4: Floating Static Routes...............................................................................................................49Equipment Needed..........................................................................................................................49Configuration Overview..................................................................................................................50ISDN Switch Setup.........................................................................................................................50Router Configuration.......................................................................................................................50RouterA...........................................................................................................................................50RouterB...........................................................................................................................................51Monitoring and Testing the Configuration......................................................................................52

Lab #5: Dialer Profiles...........................................................................................................................61Equipment Needed..........................................................................................................................61Configuration Overview..................................................................................................................61ISDN Switch Setup.........................................................................................................................61Router Configuration.......................................................................................................................61RouterA...........................................................................................................................................61RouterB...........................................................................................................................................62Monitoring and Testing the Configuration......................................................................................63

Lab #6: ISDN BRI to ISDN PRI...........................................................................................................67Equipment Needed..........................................................................................................................67Configuration Overview..................................................................................................................67ISDN Switch Setup.........................................................................................................................67Router Configuration.......................................................................................................................67RouterA...........................................................................................................................................67RouterB...........................................................................................................................................68Monitoring and Testing the Configuration......................................................................................69

Lab #7: Snapshot Routing......................................................................................................................77Equipment Needed..........................................................................................................................77Configuration Overview..................................................................................................................77ISDN Switch Setup.........................................................................................................................77Router Configuration.......................................................................................................................78RouterA...........................................................................................................................................78RouterB...........................................................................................................................................79Monitoring and Testing the Configuration......................................................................................79

Lab #8: OSPF Demand Circuits............................................................................................................82Equipment Needed..........................................................................................................................82

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Table of ContentsChapter 3: ISDN

Configuration Overview..................................................................................................................83ISDN Switch Setup.........................................................................................................................83Router Configuration.......................................................................................................................83RouterA...........................................................................................................................................83RouterB...........................................................................................................................................84Monitoring and Testing the Configuration......................................................................................85

Lab #9: PPP Callback............................................................................................................................89Equipment Needed..........................................................................................................................89Configuration Overview..................................................................................................................89ISDN Switch Setup.........................................................................................................................89Router Configuration.......................................................................................................................89RouterA...........................................................................................................................................89RouterB...........................................................................................................................................90Monitoring and Testing the Configuration......................................................................................91

Lab #10: Dialer Watch...........................................................................................................................94Equipment Needed..........................................................................................................................94Configuration Overview..................................................................................................................94ISDN Switch Setup.........................................................................................................................95Router Configuration.......................................................................................................................95RouterA...........................................................................................................................................95RouterB...........................................................................................................................................96Monitoring and Testing the Configuration......................................................................................97

Lab #11: ISDN Troubleshooting...........................................................................................................99Equipment Needed........................................................................................................................100Configuration Overview................................................................................................................100ISDN Switch Setup.......................................................................................................................100Router Configuration.....................................................................................................................100RouterA.........................................................................................................................................100RouterB.........................................................................................................................................101Monitoring and Testing the Configuration....................................................................................102

Conclusion...........................................................................................................................................114

Chapter 4: Frame Relay.................................................................................................................................115Overview..............................................................................................................................................115Introduction..........................................................................................................................................115Frame Relay Technology Overview....................................................................................................115

The Justification for Frame Relay.................................................................................................115What Is Frame Relay...........................................................................................................................116

Frame Relay Terminology.............................................................................................................117Frame Relay Addressing...............................................................................................................117Frame Relay Frame Format...........................................................................................................118Frame Relay Congestion Control..................................................................................................120Frame Relay Error Handling.........................................................................................................120Frame Relay Class of Service.......................................................................................................120Local Management Interface.........................................................................................................121Status Request from the Router to the Frame Relay Switch.........................................................122Status Reply from the Frame Relay Switch to Router..................................................................123Full Status Request from the Router to the Frame Relay Switch..................................................123Full Status Reply from the Frame Relay Switch to the Router.....................................................124Asynchronous Status Updates.......................................................................................................124Status Request from the Router to the Frame Relay Switch.........................................................125

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Table of ContentsChapter 4: Frame Relay

Status Reply from the Frame Relay Switch to the Router............................................................125Asynchronous Update from the Frame Relay Switch to the Router.............................................126Status Request from the Router to the Frame Relay Switch.........................................................126

Inverse Address Resolution Protocol (Inverse ARP)...........................................................................127Inverse ARP Request.....................................................................................................................127Inverse ARP Reply........................................................................................................................128

Cisco Frame Relay Capabilities...........................................................................................................128Frame Relay Switching.................................................................................................................129IETF and Cisco Encapsulation......................................................................................................129Traffic Shaping..............................................................................................................................130DE Support....................................................................................................................................131BECN Support...............................................................................................................................131Payload Compression....................................................................................................................131LMI Autosense..............................................................................................................................131

Commands Discussed in This Chapter................................................................................................131Definitions.....................................................................................................................................132

IOS Requirements................................................................................................................................133Lab #12: Configuring a Cisco Routeras a Frame Relay Switch..........................................................133

Equipment Needed........................................................................................................................134Configuration Overview................................................................................................................134Router Configuration.....................................................................................................................134RouterA (Frame Relay DTE)........................................................................................................134RouterB (Frame Relay DTE)........................................................................................................135FrameSwitch (Frame Relay Switch).............................................................................................135Monitoring and Testing the Configuration....................................................................................137

Lab #13: Configuring LMI Autosense.................................................................................................141Equipment Needed........................................................................................................................141Configuration Overview................................................................................................................141Router Configuration.....................................................................................................................141Frameswitch..................................................................................................................................141Router B........................................................................................................................................142Monitoring and Testing the Configuration....................................................................................142Demonstrating the Configuration..................................................................................................144Annex D Request from RouterB to FrameSwitch.........................................................................144Annex A Request from RouterB to FrameSwitch.........................................................................145Cisco LMI Request from RouterB to FrameSwitch......................................................................145FrameSwitch Response to RouterB Cisco LMI Status Request....................................................146

Lab #14: Configuring Cisco Discard Eligibility Support....................................................................146Equipment Needed........................................................................................................................146Configuration Overview................................................................................................................146Router Configuration.....................................................................................................................147FrameSwitch (Frame Relay Switch).............................................................................................147RouterA (Frame Relay DTE)........................................................................................................148RouterB (Frame Relay DTE)........................................................................................................148Monitoring and Testing the Configuration....................................................................................148

Lab #15: Frame Relay Map Statements...............................................................................................153Equipment Needed........................................................................................................................153Configuration Overview................................................................................................................153Router Configuration.....................................................................................................................153FrameSwitch (Frame Relay Switch).............................................................................................153RouterA (Frame Relay DTE)........................................................................................................154

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Table of ContentsChapter 4: Frame Relay

RouterB (Frame Relay DTE)........................................................................................................155Monitoring and Testing the Configuration....................................................................................155

Lab #16: Full Connectivity witha Partial PVC Mesh and FrameRelay Map Statements....................159Equipment Needed........................................................................................................................159Configuration Overview................................................................................................................159Router Configuration.....................................................................................................................160FrameSwitch (Frame Relay Switch).............................................................................................160RouterA (Frame Relay DTE)........................................................................................................161RouterB (Frame Relay DTE)........................................................................................................161RouterC (Frame Relay DTE)........................................................................................................162Monitoring and Testing the Configuration....................................................................................162

Lab #16: Full Connectivity witha Partial PVC Mesh and FrameRelay Map Statements....................167Equipment Needed........................................................................................................................167Configuration Overview................................................................................................................168Router Configuration.....................................................................................................................168FrameSwitch (Frame Relay Switch).............................................................................................168RouterA (Frame Relay DTE)........................................................................................................169RouterB (Frame Relay DTE)........................................................................................................169RouterC (Frame Relay DTE)........................................................................................................170Monitoring and Testing the Configuration....................................................................................170

Lab #17: Full Connectivity with a Partial PVC Mesh and Subinterfaces............................................176Equipment Needed........................................................................................................................176Configuration Overview................................................................................................................176Router Configuration.....................................................................................................................177FrameSwitch (Frame Relay Switch).............................................................................................177RouterA (Frame Relay DTE)........................................................................................................177RouterB (Frame Relay DTE)........................................................................................................178RouterC (Frame Relay DTE)........................................................................................................178Monitoring and Testing the Configuration....................................................................................179

Lab #18: Frame Relay Traffic Shaping...............................................................................................184Equipment Needed........................................................................................................................184Configuration Overview................................................................................................................184Router Configuration.....................................................................................................................184FrameSwitch (Frame Relay Switch).............................................................................................184RouterA (Frame Relay DTE)........................................................................................................185RouterB (Frame Relay DTE)........................................................................................................185Monitoring and Testing the Configuration....................................................................................186

Lab #19: Monitoring and Troubleshooting Frame Relay Connections...............................................190Equipment Needed........................................................................................................................190Configuration Overview................................................................................................................190Router Configuration.....................................................................................................................190FrameSwitch (Frame Relay Switch).............................................................................................190RouterA (Frame Relay DTE)........................................................................................................191RouterB (Frame Relay DTE)........................................................................................................191Monitoring and Testing the Configuration....................................................................................192

Conclusion...........................................................................................................................................196

Chapter 5: Asynchronous Transfer Mode (ATM).......................................................................................197Overview..............................................................................................................................................197Introduction..........................................................................................................................................197

ATM Overview.............................................................................................................................197

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Table of ContentsChapter 5: Asynchronous Transfer Mode (ATM)

ATM Protocol Stack......................................................................................................................198ATM Cell Basic Format................................................................................................................199ATM Cell Header..........................................................................................................................199ATM Addressing...........................................................................................................................200Components of an ATM Network.................................................................................................200ATM Physical Interfaces...............................................................................................................201ATM Call Types............................................................................................................................201ATM Switching Operation............................................................................................................201ATM Classes of Service................................................................................................................202ATM Quality of Service (QOS)....................................................................................................202ATM with a NonATM Device....................................................................................................202ATM LANE..................................................................................................................................203Cisco ATM Capabilities................................................................................................................204

Commands Discussed in This Chapter................................................................................................204Definitions.....................................................................................................................................205

IOS Requirements................................................................................................................................205Lab #20: ATM Configuration on a Cisco 4500...................................................................................206

Equipment Needed........................................................................................................................206Configuration Overview................................................................................................................206Router Configuration.....................................................................................................................206RouterA.........................................................................................................................................206RouterB.........................................................................................................................................207Monitoring and Testing the Configuration....................................................................................207

Lab #21: ATM Loopbacks on a Cisco 4500........................................................................................210Equipment Needed........................................................................................................................210Configuration Overview................................................................................................................210Router Configuration.....................................................................................................................211RouterA.........................................................................................................................................212RouterB.........................................................................................................................................212Monitoring and Testing the Configuration Loopback Diagnostic................................................213Loopback Line...............................................................................................................................216

Lab #22: ATM LANE..........................................................................................................................218Equipment Needed........................................................................................................................218Configuration Overview................................................................................................................218Router and Switch Configuration..................................................................................................218RouterA.........................................................................................................................................219RouterB.........................................................................................................................................219LS1010..........................................................................................................................................220Monitoring and Testing the Configuration....................................................................................221Troubleshooting ATM...................................................................................................................223

Conclusion...........................................................................................................................................224

Chapter 6: Routing Information Protocol....................................................................................................225Overview..............................................................................................................................................225Introduction..........................................................................................................................................225Technology Overview..........................................................................................................................225

Routing Loops...............................................................................................................................226RIP Message Format.....................................................................................................................228

Commands Discussed in This Chapter................................................................................................228Definitions.....................................................................................................................................229

IOS Requirements................................................................................................................................229

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Table of ContentsChapter 6: Routing Information Protocol

Lab #23: Basic RIP Configuration.......................................................................................................229Equipment Needed........................................................................................................................229Configuration Overview................................................................................................................230Router Configurations...................................................................................................................230RouterA.........................................................................................................................................230RouterB.........................................................................................................................................231RouterC.........................................................................................................................................231Monitoring and Testing the Configuration....................................................................................232

Lab #24: Passive Interface Configuration............................................................................................233Equipment Needed........................................................................................................................233Configuration Overview................................................................................................................233Router Configurations...................................................................................................................234RouterA.........................................................................................................................................234RouterB.........................................................................................................................................234RouterC.........................................................................................................................................235Monitoring and Testing the Configuration....................................................................................235

Lab #25: RIP Timer Configurations....................................................................................................236Equipment Needed........................................................................................................................236Configuration Overview................................................................................................................236Router Configurations...................................................................................................................237RouterA.........................................................................................................................................237RouterB.........................................................................................................................................238RouterC.........................................................................................................................................239Monitoring and Testing the Configuration....................................................................................239

Lab #26: Configuring Unicast RIP Updates........................................................................................241Equipment Needed........................................................................................................................241Router Configurations...................................................................................................................241RouterA.........................................................................................................................................241Monitoring and Testing the Configuration....................................................................................242

Lab #27: RIP and Discontiguous Networks.........................................................................................242Equipment Needed........................................................................................................................242Router Configurations...................................................................................................................243RouterA.........................................................................................................................................243RouterB.........................................................................................................................................243Monitoring and Testing the Configuration....................................................................................244Troubleshooting RIP.....................................................................................................................245

Conclusion...........................................................................................................................................246

Chapter 7: Interior Gateway Routing Protocol...........................................................................................248Overview..............................................................................................................................................248Introduction..........................................................................................................................................248Technology Overview..........................................................................................................................248

Routing Loops...............................................................................................................................248Split Horizon.................................................................................................................................248Poison Reverse..............................................................................................................................249Holddown......................................................................................................................................249Flash Updates................................................................................................................................250IGRP Routes..................................................................................................................................250

Commands Discussed in This Chapter................................................................................................250Definitions.....................................................................................................................................250

IOS Requirements................................................................................................................................251

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Table of ContentsChapter 7: Interior Gateway Routing Protocol

Lab #28: Basic IGRP Configuration....................................................................................................251Equipment Needed........................................................................................................................251Configuration Overview................................................................................................................252Router Configurations...................................................................................................................252RouterA.........................................................................................................................................252RouterB.........................................................................................................................................252RouterC.........................................................................................................................................253Monitoring and Testing the Configuration....................................................................................254

Lab #28: Basic IGRP Configuration....................................................................................................255Equipment Needed........................................................................................................................255Configuration Overview................................................................................................................255Router Configurations...................................................................................................................256RouterA.........................................................................................................................................256RouterB.........................................................................................................................................256RouterC.........................................................................................................................................257Monitoring and Testing the Configuration....................................................................................257

Lab #29: Passive Interface Configuration............................................................................................259Equipment Needed........................................................................................................................259Configuration Overview................................................................................................................259Router Configurations...................................................................................................................260RouterA.........................................................................................................................................260RouterB.........................................................................................................................................261RouterC.........................................................................................................................................261Monitoring and Testing the Configuration....................................................................................262

Lab #30: IGRP UnequalCost Load Balancing..................................................................................263Equipment Needed........................................................................................................................263Overview.......................................................................................................................................263Configuration Overview................................................................................................................264Router Configurations...................................................................................................................264RouterA.........................................................................................................................................264RouterB.........................................................................................................................................265RouterC.........................................................................................................................................265Monitoring and Testing the Configuration....................................................................................266

Lab #31: IGRP Timer Configurations.................................................................................................267Equipment Needed........................................................................................................................267Configuration Overview................................................................................................................267Router Configurations...................................................................................................................268RouterA.........................................................................................................................................268RouterB.........................................................................................................................................269RouterC.........................................................................................................................................270Monitoring and Testing the Configuration....................................................................................270

Lab #32: Configuring Unicast IGRP Updates.....................................................................................271Equipment Needed........................................................................................................................271Router Configurations...................................................................................................................271RouterA.........................................................................................................................................271Monitoring and Testing the Configuration....................................................................................272

Troubleshooting IGRP.........................................................................................................................272Conclusion...........................................................................................................................................274

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Table of ContentsChapter 8: OSPF.............................................................................................................................................275

Overview..............................................................................................................................................275Introduction..........................................................................................................................................275OSPF Terminology..............................................................................................................................275Technology Overview..........................................................................................................................276

Link State Routing Protocol..........................................................................................................276Flooding.........................................................................................................................................277Dijkstra Algorithm........................................................................................................................277Areas..............................................................................................................................................277Backbone Area 0...........................................................................................................................277Designated Router (DR)................................................................................................................278OSPF Protocol Packets..................................................................................................................278Link State Advertisements............................................................................................................279Router Link....................................................................................................................................279Network Link................................................................................................................................280Summary Link...............................................................................................................................280External Link.................................................................................................................................280How It Works................................................................................................................................280How an Adjacency Is Formed.......................................................................................................281Sniffer Trace of Database Synchronization...................................................................................282

OSPF Network Types..........................................................................................................................287Broadcast.......................................................................................................................................287NonBroadcast..............................................................................................................................288PointtoPoint..............................................................................................................................289PointtoMultipoint......................................................................................................................289

Commands Discussed in This Chapter................................................................................................289Definitions.....................................................................................................................................290

IOS Requirements................................................................................................................................292Lab #33: Basic OSPF Configuration...................................................................................................292

Equipment Needed........................................................................................................................292Configuration Overview................................................................................................................292Enabling OSPF..............................................................................................................................292Router Configurations...................................................................................................................293RouterA.........................................................................................................................................293RouterB.........................................................................................................................................293Monitoring and Testing the Configuration....................................................................................294

Lab #34: Configuring OSPF Priority "DR Election"...........................................................................296Equipment Needed........................................................................................................................296Configuration Overview................................................................................................................296Router Configurations...................................................................................................................296RouterA.........................................................................................................................................296RouterB.........................................................................................................................................297RouterC.........................................................................................................................................298RouterD.........................................................................................................................................298Monitoring and Testing the Configuration....................................................................................299

Lab #35: Configuring OSPF Virtual Links..........................................................................................300Equipment Needed........................................................................................................................300Configuration Overview................................................................................................................301Router Configurations...................................................................................................................301RouterA.........................................................................................................................................301RouterB.........................................................................................................................................302RouterC.........................................................................................................................................302

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Table of ContentsChapter 8: OSPF

Monitoring and Testing the Configuration....................................................................................303Lab #36: Configuring OSPF Neighbor Authentication.......................................................................305

Equipment Needed........................................................................................................................305Overview.......................................................................................................................................305Configuration Overview................................................................................................................305Router Configurations...................................................................................................................306RouterA.........................................................................................................................................306RouterB.........................................................................................................................................307RouterC.........................................................................................................................................308Monitoring and Testing the Configuration....................................................................................308

Lab #37: Configuring OSPF on NBMA Network "NonBroadcast Model"......................................309Equipment Needed........................................................................................................................309Overview.......................................................................................................................................309Configuration Overview................................................................................................................310Router Configurations...................................................................................................................310FrameSwitch..................................................................................................................................310RouterA.........................................................................................................................................311RouterB.........................................................................................................................................312RouterC.........................................................................................................................................312Monitoring and Testing the Configuration....................................................................................313

Lab #38: Configuring OSPF on NBMA Network "Broadcast Model"...............................................316Equipment Needed........................................................................................................................316Overview.......................................................................................................................................316Configuration Overview................................................................................................................316Router Configurations...................................................................................................................316FrameSwitch..................................................................................................................................317RouterA.........................................................................................................................................317RouterB.........................................................................................................................................318RouterC.........................................................................................................................................319Monitoring and Testing the Configuration....................................................................................320

Lab #39: Configuring OSPF on NBMA Network "PointtoMultipoint Model"..............................322Equipment Needed........................................................................................................................322Overview.......................................................................................................................................322Configuration Overview................................................................................................................322Router Configurations...................................................................................................................323FrameSwitch..................................................................................................................................323RouterA.........................................................................................................................................324RouterB.........................................................................................................................................324RouterC.........................................................................................................................................325Monitoring and Testing the Configuration....................................................................................326

Lab #40: Configure OSPF Interface Parameters.................................................................................326Equipment Needed........................................................................................................................326Overview.......................................................................................................................................327Configuration Overview................................................................................................................327Router Configurations...................................................................................................................327RouterA.........................................................................................................................................327RouterB.........................................................................................................................................328RouterC.........................................................................................................................................329Monitoring and Testing the Configuration....................................................................................329

Lab #41: InterArea and External Route Summarization...................................................................331Equipment Needed........................................................................................................................331

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Table of ContentsChapter 8: OSPF

Overview.......................................................................................................................................332Configuration Overview................................................................................................................332Router Configurations...................................................................................................................332RouterA.........................................................................................................................................332RouterB.........................................................................................................................................333RouterC.........................................................................................................................................334RouterD.........................................................................................................................................334RouterE..........................................................................................................................................335Monitoring and Testing the Configuration....................................................................................335

Lab #42: Regular, Stub, Totally Stub, and NSSA Areas.....................................................................338Equipment Needed........................................................................................................................338Overview.......................................................................................................................................338Configuration Overview................................................................................................................338Router Configurations...................................................................................................................339RouterA.........................................................................................................................................339RouterB.........................................................................................................................................340RouterC.........................................................................................................................................340RouterD.........................................................................................................................................341RouterE..........................................................................................................................................341Monitoring and Testing the Configuration....................................................................................342

Troubleshooting OSPF........................................................................................................................345Conclusion...........................................................................................................................................348

Chapter 9: Enhanced Interior Gateway Routing Protocol.........................................................................349Overview..............................................................................................................................................349Introduction..........................................................................................................................................349

EIGRP Terminology......................................................................................................................349Technology Overview..........................................................................................................................351

EIGRP Metrics..............................................................................................................................351IOS Requirements................................................................................................................................353Commands Discussed in This Chapter................................................................................................353

Definitions.....................................................................................................................................354Lab #43: Basic EIGRP Configuration.................................................................................................355

Equipment Needed........................................................................................................................355Configuration Overview................................................................................................................355Router Configurations...................................................................................................................355RouterA.........................................................................................................................................355RouterB.........................................................................................................................................356RouterC.........................................................................................................................................356Monitoring and Testing the Configuration....................................................................................357

Lab #44: Passive Interface Configuration............................................................................................360Equipment Needed........................................................................................................................360Configuration Overview................................................................................................................361Router Configurations...................................................................................................................361RouterA.........................................................................................................................................361RouterB.........................................................................................................................................362RouterC.........................................................................................................................................362Monitoring and Testing the Configuration....................................................................................363

Lab #45: EIGRP UnequalCost Load Balancing................................................................................365Equipment Needed........................................................................................................................365Overview.......................................................................................................................................365

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Table of ContentsChapter 9: Enhanced Interior Gateway Routing Protocol

Configuration Overview................................................................................................................365Router Configurations...................................................................................................................366RouterA.........................................................................................................................................366RouterB.........................................................................................................................................366RouterC.........................................................................................................................................367Monitoring and Testing the Configuration....................................................................................367

Lab #46: EIGRP Timer Configuration................................................................................................369Equipment Needed........................................................................................................................369Overview.......................................................................................................................................369Configuration Overview................................................................................................................370Router Configurations...................................................................................................................370RouterA.........................................................................................................................................370RouterB.........................................................................................................................................371Monitoring and Testing the Configuration....................................................................................371

Lab #47: Configuring EIGRP on an NBMA Network........................................................................372Equipment Needed........................................................................................................................372Overview.......................................................................................................................................373Configuration Overview................................................................................................................373Router Configurations...................................................................................................................373FrameSwitch..................................................................................................................................373RouterA.........................................................................................................................................374RouterB.........................................................................................................................................375RouterC.........................................................................................................................................375Monitoring and Testing the Configuration....................................................................................376Troubleshooting EIGRP................................................................................................................377

Conclusion...........................................................................................................................................378

Chapter 10: Border Gateway Protocol (BGP).............................................................................................380Overview..............................................................................................................................................380Introduction..........................................................................................................................................380

BGP Terminology.........................................................................................................................381Technology Overview...................................................................................................................382BGP Neighbor Negotiation...........................................................................................................383BGP Message Format....................................................................................................................384Open Message Format...................................................................................................................384Update Message Format................................................................................................................385KeepAlive Message Format..........................................................................................................388Notification Message Format........................................................................................................388

Commands Discussed in This Chapter................................................................................................389Definitions.....................................................................................................................................390IOS Requirements.........................................................................................................................392

Lab #48: BGP Configuration...............................................................................................................392Equipment Needed........................................................................................................................392Configuration Overview................................................................................................................393Router Configurations...................................................................................................................393RouterA.........................................................................................................................................393RouterB.........................................................................................................................................394RouterC.........................................................................................................................................394Monitoring and Testing the Configuration....................................................................................395BGP Summarization......................................................................................................................398BGP Aggregation..........................................................................................................................399

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Table of ContentsChapter 10: Border Gateway Protocol (BGP)

Router Configurations...................................................................................................................400RouterA.........................................................................................................................................400RouterB.........................................................................................................................................401RouterD.........................................................................................................................................401

Lab #49: BGP Route Reflectors..........................................................................................................403Equipment Needed........................................................................................................................403Route Reflector Overview.............................................................................................................403Configuration Overview................................................................................................................404Router Configurations...................................................................................................................404RouterA.........................................................................................................................................404RouterB.........................................................................................................................................405RouterC.........................................................................................................................................406RouterD.........................................................................................................................................406Monitoring and Testing the Configuration....................................................................................407

Lab #50: Manipulating BGP Path Selection........................................................................................409Equipment Needed........................................................................................................................409BGP Path Selection Overview......................................................................................................409Configuration Overview................................................................................................................410Router Configurations...................................................................................................................410RouterA.........................................................................................................................................410RouterB.........................................................................................................................................411RouterC.........................................................................................................................................411RouterD.........................................................................................................................................412Monitoring and Testing the Configuration....................................................................................413Local Preference Attribute............................................................................................................414The MultiExit Discriminator (MED) Attribute...........................................................................415AS Path Manipulation...................................................................................................................417Route Filtering Based on Network Number..................................................................................418BGP Soft Configuration................................................................................................................418Regular Expressions......................................................................................................................419Filtering Based on AS Path...........................................................................................................419

Lab #51: BGP Confederations.............................................................................................................421Equipment Needed........................................................................................................................421Configuration Overview................................................................................................................421Router Configurations............................................................................................