Enhanced descriptions from Syndetics:

The Cisco Internetwork Troubleshooting course is recommended training for CCNP certification candidates. This book serves as a supplement for those who have taken the course and a replacement for those who choose not to. It includes troubleshooting exercises to simulate the labs in the CIT course.

Table of contents provided by Syndetics

• Foreword (p. xiv)
• Introduction (p. xv)
• Part 1 Troubleshooting Tools and Methodology
• Chapter 1 Troubleshooting Methodology (p. 4)
• Using a Systematic Troubleshooting Method (p. 5)
• The Complexity of Internetworks (p. 6)
• The Problem-Solving Model (p. 8)
• Step 1 Define the Problem (p. 10)
• Step 2 Gather the Facts (p. 12)
• Step 3 Consider the Possibilities (p. 12)
• Step 4 Create an Action Plan (p. 14)
• Step 5 Implement the Action Plan (p. 15)
• Step 6 Observe the Results of the Action Plan (p. 16)
• Step 7 Repeat the Problem-Solving Process (p. 16)
• Step 8 Resolve the Problem (p. 18)
• Preparing Yourself to Troubleshoot (p. 18)
• Chapter 2 Protocol Characteristics Overview (p. 24)
• Basic Protocol Characteristics (p. 25)
• Connection-Oriented Services (p. 26)
• Connectionless Services (p. 27)
• Sample Connection Sequences (p. 28)
• Detailed Protocol Characteristics (p. 33)
• Connection-Oriented Versus Connectionless Protocols (p. 35)
• OSI Layer 2 Characteristics (p. 39)
• OSI Layers 3 to 7 Characteristics--Routed Protocols and Routing Protocols (p. 92)
• Chapter 3 Cisco Routing and Switching Processes (p. 150)
• Routing (p. 151)
• Switching (p. 153)
• Basic Switching Paths (p. 154)
• Sample Packet Flow (p. 159)
• Switching Features That Affect Performance (p. 162)
• Process Switching (p. 164)
• System Buffering and Queuing (p. 165)
• Input and Output Queues (p. 167)
• Interface Buffers (p. 168)
• Chapter 4 General Troubleshooting Tools (p. 172)
• Low-End Cable Test Equipment (p. 173)
• High-End Cable Testers (p. 175)
• Digital Interface Testing Tools (p. 176)
• Network Monitors (p. 177)
• Protocol Analyzers (p. 178)
• Network Management Systems (p. 180)
• Simulation and Modeling Tools (p. 182)
• Chapter 5 Cisco Management and Diagnostic Tools (p. 186)
• Cisco Management Tools (p. 187)
• Cisco Works (p. 187)
• The Netsys Network Management Suites (p. 190)
• TrafficDirector Remote Monitoring Software (p. 192)
• The VlanDirector Switch Management Application (p. 194)
• WAN Manager (p. 195)
• Cisco Diagnostic Commands (p. 196)
• show Commands (p. 198)
• debug Commands (p. 221)
• Ping and trace Commands (p. 229)
• The cdp Command (p. 240)
• Core Dumps (p. 252)
• Chapter 6 Troubleshooting Sample Exercises (p. 256)
• Exercise 1 A Token Ring Network (p. 257)
• Exercise 2 The Sydney Router (p. 259)
• Exercise 3 The Brussels Router (p. 262)
• Part II Routing and Routed Protocol Troubleshooting
• Chapter 7 Troubleshooting TCP/IP Connectivity (p. 274)
• TCP/IP Router Diagnostic Tools (p. 275)
• The TCP/IP ping Command (p. 275)
• The TCP/IP trace Command (p. 280)
• TCP/IP show Commands (p. 282)
• TCP/IP debug Commands (p. 294)
• Problem Isolation in TCP/IP Networks (p. 302)
• Symptom: Users Can Access Some Hosts but Not Others (p. 303)
• Symptom: Users Cannot Connect When One Redundant Path Is Down (p. 305)
• Troubleshooting IP Internetworking with Windows NT (p. 306)
• Browsing Problems (p. 307)
• TCP/IP Symptoms and Problems (p. 308)
• TCP/IP Problems and Action Plans (p. 309)
• Pinging Your Loopback and Local IP Addresses (p. 313)
• Pinging Your Cisco Router (p. 313)
• Pinging the DNS Server, Default Gateway, and WINS Server (p. 313)
• Pinging the Remote Target IP Address (p. 314)
• The tracert Tool (p. 314)
• Checking the Routing Table on a Windows NT System (p. 315)
• Clearing the Windows NT System ARP Cache (p. 316)
• DNS Configuration (p. 316)
• The HOSTS File (p. 317)
• The LMHOSTS File (p. 317)
• Winsock Proxy Problems (p. 317)
• Chapter 8 Troubleshooting Novell Connectivity (p. 322)
• Novell NetWare Router Diagnostic Tools (p. 323)
• The IPX ping Command (p. 323)
• The IPX show Commands (p. 324)
• The IPX debug Commands (p. 338)
• Problem Isolation in NetWare Networks (p. 345)
• NetWare Symptoms and Problems (p. 347)
• Troubleshooting Encapsulation Mismatches (p. 348)
• NetWare Problems and Action Plans (p. 349)
• Chapter 9 Troubleshooting AppleTalk Connectivity (p. 356)
• AppleTalk Router Diagnostic Commands (p. 357)
• AppleTalk show Commands (p. 357)
• NBP Testing (p. 374)
• AppleTalk debug Commands (p. 376)
• Problem Isolation in AppleTalk Networks (p. 385)
• AppleTalk Symptoms and Problems (p. 386)
• AppleTalk Problems and Action Plans (p. 388)
• AppleTalk Internetworking Configuration Tips (p. 392)
• Part III Campus Switch and VLAN Troubleshooting
• Chapter 10 Diagnosing and Correcting Catalyst Problems (p. 398)
• Catalyst Series Overview (p. 399)
• Catalyst 5000 Internal Architecture (p. 401)
• Catalyst Switching Technology (p. 404)
• Spanning-Tree Review (p. 406)
• VLAN Frame Tagging with ISL (p. 408)
• Catalyst 5000 Troubleshooting Tools (p. 415)
• Troubleshooting Catalyst Switch LEDs (p. 418)
• Catalyst 5000 Switch Diagnostic Tools: ping (p. 421)
• CDP (p. 421)
• SPAN (p. 423)
• Catalyst Commands (p. 425)
• show Commands for System Settings (p. 426)
• show Commands for Switch Configuration (p. 430)
• Problem Isolation in Catalyst Networks (p. 437)
• Catalyst Symptoms and Problems (p. 438)
• Chapter 11 Troubleshooting VLANs on Routers and Switches (p. 442)
• VLANs on Routed and Switched Networks (p. 444)
• VLAN Switching, Translation, and Routing (p. 445)
• The Router's Layer 2 Translation Function (p. 447)
• Cisco IOS Fast Ethernet Troubleshooting (p. 447)
• VLAN Troubleshooting Issues (p. 450)
• VLAN Design Issues (p. 450)
• Router Functionality in a Switched Network (p. 451)
• CDP (p. 452)
• Using Telnet to a Switch on a Different Subnet (p. 452)
• Router VLAN show Commands (p. 453)
• The show vlan Command (p. 454)
• The show span Command (p. 455)
• Router VLAN debug Commands (p. 457)
• The debug vlan packet Command (p. 457)
• The debug span Command (p. 458)
• Problem Isolation in Router/Switch VLAN Networks (p. 460)
• Troubleshooting Example: Dropped Packets and Loops (p. 460)
• Router VLAN Symptoms and Problems (p. 462)
• Part IV WAN Troubleshooting
• Chapter 12 Diagnosing and Correcting Frame Relay Problems (p. 468)
• Troubleshooting Frame Relay (p. 469)
• Frame Relay Frame Format (p. 471)
• Problem Isolation in Frame Relay WANs (p. 471)
• Overview of Troubleshooting Commands (p. 474)
• WAN and Frame Relay Diagnostic Tools (p. 475)
• The Frame Relay show Commands (p. 475)
• The Frame Relay debug Commands (p. 480)
• Frame Relay Loopback Tests (p. 485)
• Chapter 13 Diagnosing and Correcting ISDN BRI Problems (p. 488)
• Problem Isolation in ISDN BRI Networks (p. 489)
• Overview of Troubleshooting Commands (p. 493)
• ISDN BRI Diagnostic Tools (p. 493)
• ISDN BRI show Commands (p. 493)
• ISDN BRI debug Commands (p. 505)
• Part V Appendixes
• Appendix A Chapter Test Answer Key (p. 530)
• Appendix B Cisco Support Functions (p. 542)
• Using CCO to Prevent Problems (p. 545)
• Cisco Documentation (p. 546)
• Cisco Press (p. 547)
• CCO MarketPlace (p. 547)
• CCO Software Center (p. 548)
• Using CCO to Correct Problems (p. 548)
• Cisco's Bug Toolkit II (p. 549)
• CCO Troubleshooting Engine (p. 549)
• CCO Stack Decoder (p. 550)
• CCO Open Forum (p. 550)
• TAC (p. 551)
• CCO Training Information (p. 553)
• Chapter C References and Recommended Reading (p. 554)
• Books and Periodicals (p. 555)
• Technical Publications and Standards (p. 557)
• Chapter D Problem-Solving Checklist and Worksheet (p. 562)
• Troubleshooting Checklist (p. 563)
• Troubleshooting Worksheet (p. 564)
• Index (p. 570)

Author notes provided by Syndetics

Laura Chappell , senior protocol analyst, is a highly energetic speaker and author who has trained thousands of LAN/WAN administrators, engineers, technicians, and developers. Ms. Chappell has provided Cisco training since 1992 and has written numerous books and articles on a variety of networking subjects.

Dan Farkas , CCIE(r) N0. 3800, is a general manager for Advanced Network Information (ANI), a high-quality Cisco Learning Partner. He is CCIE certified and a certified Cisco Systems instructor. For the last five years, Dan has been teaching a variety of network configuration, design, and troubleshooting classes, including various router, LAN switching, and voice/data integration classes.