Contents\r\n\r\nIntroduction \r\n\r\nAssessment Test \r\n\r\nChapter 1 Troubleshooting Methodology\r\n\r\nThe Complexity of Internetworks \r\nThe Problem-Solving Model \r\nStep 1:Define the Problem \r\nStep 2:Gather Facts \r\nStep 3:Consider Possibilities\r\nSteps 4 and 5:Create and Implement the Action Plan\r\nStep 6:Observe Results \r\nStep 7:Iterate as Needed \r\nWhen the Problem Is Resolved \r\nStep 8:Document the Changes \r\nThe Problem-Solving Checklist \r\nSummary \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions\r\n\r\nChapter 2 Protocol Attributes \r\n\r\nThe OSI Reference Model \r\nGlobal Protocol Classifications \r\nConnection-Oriented Protocols \r\nConnectionless Protocols \r\nOSI Layer 3:Routed and Routing Protocols \r\nInternet Protocol (IP) \r\nInternet Control Message Protocol (ICMP)\r\nTransport Control Protocol (TCP) \r\nRouting Information Protocol (RIP) \r\nInterior Gateway Routing Protocol (IGRP)\r\nEnhanced IGRP (EIGRP) \r\nOpen Shortest Path First (OSPF) \r\nInitializing OSPF \r\nBGP(Border Gateway Protocol)\r\nNovell NetWare Protocols \r\nAppleTalk Protocols \r\nOSI Layer 2:Data-Link Layer Protocols and Applications \r\nEthernet/IEEE 8O2.3 \r\nToken Ring/IEEE 8O2.5 \r\nFiber Distributed Data Interface (FDDI) \r\nPoint-to-Point Protocol (PPP) \r\nSynchronous Data Link Control (SDLC)\r\nX.25 \r\nFrame Relay \r\nIntegrated Services Digital NetWork (ISDN) \r\nSummary \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions\r\n\r\nChapter 3 Generic Troubleshooting Tools \r\n\r\nPhysical Media Test Equipment\r\nMultimeters and Cable Testers \r\nTime Domain Reflectors (TDRs) and OpticaI TDRs (OTDRs) \r\nDigital Interface Testing Tools \r\nSoftware Test Equipment \r\nNetwork Monitors \r\nNetwork Analyzers \r\nNetwork Management Systems (NMSs)\r\nCisco Network Management Software \r\nCiscoWorks 2OOO \r\nNetSys \r\nCiscoSecure \r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions\r\n\r\nChapter 4 Ciscos Diagnostic Commands\r\n\r\nUnderstanding the Output from Diagnostic Commands\r\nThe Routing Process \r\nThe Switchiflg Process\r\nSwitching Methods \r\nPacket Flow-High-End Routers\r\nThe Route Processor \r\nBuffers and gueues in the Cisco 7OOO Series\r\nBuffers and gueues in Low-End Routers\r\nTroubleshooting Commands\r\nshow Commands \r\ndebug Commands \r\nExecuting a Router Core Dump\r\nping Commands \r\ntraceroute Command \r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions\r\n\r\nChapter 5 Applying Cisco’s Diagnostic Tools\r\n\r\nIdentifying and Resolving Generic Router Problems\r\nScenario #1 \r\nScenario #2 \r\nTroubleshooting Ethernet Problems\r\nScenario #1 \r\nScenario #2 \r\nTroubleshooting Token Ring Problems\r\nScenario #1 \r\nScenario #2 \r\nSummary \r\nCommands Used in This Chapter \r\nReview Questions \r\nAnswers to Review Questions \r\n\r\nChapter 6 Troublesbooting TCP\IP Connectivity\r\n\r\nTCP/IP Router Diagnostic Tools\r\nping and traceroute Commands \r\nshow Commands \r\ndebug Commands \r\nProblem Isolation in TCP/IP Networks\r\nProblem Isolation for Windows 95/98/NT\r\nLAN Connectivity Problems \r\nObtaining an IP Address\r\nARP\r\nWAN Access Problems \r\nDefault Gateways \r\nStatic and Dynamic Routing\r\nIP Access Lists \r\nStandard Access Lists \r\nExtended Access Lists \r\nICMP Messages\r\nTroubleshooting RIP\r\nRIP1 and RIP2 \r\nshow Commands\r\ndebug Commands \r\nTypical Problems \r\nTroubleshooting IGRP \r\nshow Commands \r\ndebug Commands \r\nTypical Problems \r\nTroubleshooting EIGRP\r\nNeighbor Formation \r\nshow Commands \r\ndebug Commands \r\nTypical Problems \r\nTroubleshooting OSPF \r\nNelghbor and Adjacency Formation\r\nOSPF Area Types \r\nshow Commands \r\ndebug Commands \r\nTypical Problems \r\nRedistribution of Routing Protocols\r\nDealing with Routing Metrics \r\nDistribute Lists \r\nRoute Maps \r\nTCP/IP Symptoms and Problems:Summary Sheet\r\nTCP/IP Symptoms and Action Plans:Summary Sheet\r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions \r\n\r\nChapter 7 Troubleshooting Serial Line and Frame Relay Connectivity \r\n\r\nTroubIeshooting Serial Lines \r\nHDLC Encapsulation \r\nshow interface sertal Command\r\nshow controllers Command\r\nshow buffers Command\r\ndebug serial interface Command\r\ndebug serial packet Command\r\nCSU/DSU Loopback Tests\r\nSerlal Line Summary\r\nTroubleshooting X.25\r\nshow interface serial Commands\r\ndebug Commands \r\nX.25 Link Summary\r\nTroubleshooting Frame Relay\r\nFrame Relay show Commands\r\nFrame Relay debug Commands\r\nFrame Relay Summary\r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions \r\n\r\nChapter 8 Troubleshooting ISDN\r\n\r\nISDN Fundamentals\r\nCommon ISDN Problems \r\nMisconfigured Routers \r\nPhysical Layer Connections\r\nMisconfigured Phone Switches\r\nISDN Troubleshooting Commands\r\nPing \r\nclear interface brin \r\nshow interface brin\r\nshow interface brin 1 2 \r\nshow controller bri \r\nshow isdn status \r\nshow dialer\r\nshow ppp multilink \r\nDebugging ISDN \r\nebugging ISDN \r\ndebua bri \r\ndebua isdn q921 \r\ndebug PPP negotaition \r\ndebug isdn q931 \r\ndebug PPP packet \r\ndebug dialer \r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nReview Questions \r\nAnswers to Review Questions \r\n\r\nChapter 9 Troubleshooting Novell Connectivity\r\n\r\nIPX NetWorking Fundamentals\r\nConriecting to a Novell Network\r\nEncapsulation \r\nGet Nearest Server \r\nService Advertising \r\nNovell Router Diagnostic Tools\r\nping Commands \r\nshow Commands \r\ndebug Commands \r\nCommon Novell Troubleshooting Issues\r\nEthernet Encapsulation Mismatches and Network Settings \r\nProblems Attaching to Remote Servers\r\nSAP Congestion Management in IPX RIP \r\nDebugging Scalable NetWare Protocols\r\nIPX EIGRP \r\nNLSP and IPXWAN \r\nSummary \r\nCommands Used in This Chapter \r\nKey Terms \r\nLaboratory Exercise \r\nReview Questions \r\nAnswers to Review Questions \r\n\r\nChapter 1O Troubleshooting AppleTalk Connectivity\r\n\r\nThe AppleTalk Protocol \r\nAppleTalk Addressing \r\nAppleTalk Routing \r\nAppleTalk ping Command \r\nAppleTalk show Commands \r\nAppleTalk test Commands \r\nAppleTalk debug Commands \r\nCommon AppleTalk Troubleshooting Issues\r\nZIP Storms\r\nAARP Broadcast Frames\r\nPhase One/Phase Two Compatibility Problems\r\nDuplicate or Crossed Network Numbers\r\nOverloaded Network\r\nNo Resources Listed in Chooser\r\nSummary\r\nCommands Used in This Chapter\r\nKey Terms\r\nReview Questions\r\nAnswers to Review Questions\r\n\r\nChapter 11 Troubleshooting Switched Ethernet\r\n\r\nSwitches,Bridges,adn Hubs\r\nCatalyst Troubleshooting Tools\r\nCatalyst Command Line Interface\r\nCiscoWorks for Switched Internetworks\r\nRMON\r\nIndicator Lights\r\nControlling Recurring Paths with Spanning Tree\r\nTroubleshooting Spanning Tree Problems\r\nThe Catalyst 5000 Internal Structure\r\nSAMBA\r\nSAINT\r\nSAGE\r\nEARL\r\nVirtual LANs\r\nInter-Switch Link(ISL)\r\n802.1q Trunking\r\nVLAN Trunking Protocol(VTP)\r\nCabling Issues\r\nCable Problems\r\nCross-Over Cables\r\nTroubleshooting Switched Connections\r\nThe Switched Port Analyzer\r\nThe Route Switch Module and Catalyst Routing\r\nVLANs across Routers and Switches\r\nVLAN Design Issues and Troubleshooting\r\nSummary\r\nCommands Used in This Chapter\r\nKey Terms\r\nLaboratory Exercise\r\nReiew Questions\r\nAnswers to Review Questions\r\n\r\nChapter 12 Cisco Support Functions\r\n\r\nCisco Connection Family\r\nCisco Connection Online(CCO)\r\nOnline Information\r\nFeatures and Electronic Services\r\nTroubleshooting Engine\r\nCisco Connection Documentation\r\nCisco’s Technical Assistance Center(TAC)\r\nOther Cisco Documentation\r\nSummary\r\nCommands Used in This Chapter\r\nKey Terms\r\nReview Questions\r\nAnswer to Review Questions\r\n\r\nAppendix A Practice Exam\r\n\r\nPractice Exam Questions\r\nAnswers to Practice Exam\r\n\r\nAppendix B Commands in This Study Guide\r\n\r\nGlossary