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| Foreword | |
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| About the Contributors | |
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| Acknowledgments | |
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| Preface | |
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| Introduction | |
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| Troubleshooting Methodology | |
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| Symptoms, Causes, and Actions | |
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| Slow Response Time | |
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| Performance Alerts and Notifications | |
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| Generic Problem-Solving Model | |
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| Steps to Solving a Problem | |
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| Pointers for Problem Solving | |
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| Recommended Troubleshooting Procedures | |
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| Documentation Methods | |
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| Protocol Characteristics Review | |
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| Connection-Oriented vs. Connectionless | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| LAN Troubleshooting Problem Areas | |
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| Physical Layer Responsibilities | |
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| Data Link Layer Responsibilities | |
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| MAC Layer | |
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| Logical Link Layer | |
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| Ethernet/IEEE 802.3 | |
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| CSMA/CD Protocol | |
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| Ethernet Statistics for Troubleshooting | |
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| Token Ring / IEEE 802.5 | |
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| Understanding MAC Communications | |
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| Troubleshooting Token Ring Networks | |
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| FDDI | |
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| ATM LAN Emulation (LANE) | |
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| Encapsulation Methods | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| WAN Troubleshooting Problem Areas | |
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| Point-to-Point Protocols | |
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| PPP Frame | |
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| LCP/NCP | |
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| Encapsulation | |
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| Authentication | |
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| Link States | |
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| SHOW INTERFACE and DEBUG Commands | |
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| HDLC | |
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| SDLC | |
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| PPP | |
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| Switched Protocols | |
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| Frame Relay | |
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| X.25 | |
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| SMDS | |
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| ATM | |
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| ISDN | |
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| Layer 2 of ISDN | |
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| Layer 3 of ISDN | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| The Internet Protocol (IP) | |
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| Technology Features Recap | |
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| A Note About Terminology | |
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| IP, UDP, TCP, ICMP, and Common Ports | |
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| A Closer Look at TCP | |
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| UDP | |
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| IP Broadcast and Multicast | |
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| ICMP | |
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| ICMP Redirects | |
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| ARP Caching | |
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| DNS and DNS Caching | |
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| Default Gateway | |
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| IP Helper Addresses | |
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| Common User Tasks | |
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| Obtaining an Address via DHCP | |
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| Web Page Download | |
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| FTP Transfer | |
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| Common Problems and Fixes | |
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| Splitting the Problem in Half | |
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| Ping Test | |
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| Packet-Level Debugging | |
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| Troubleshooting Lower Layers | |
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| Transport and Above | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Novell's Internetwork Packet Exchange (IPX) Protocol | |
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| IPX Protocol Suite | |
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| IPX | |
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| SPX | |
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| NCP | |
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| LIP | |
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| Packet Burst | |
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| IPX NetBIOS | |
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| RIP | |
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| SAP | |
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| NLSP | |
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| Common Packet Types and Port Numbers | |
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| Common User Tasks | |
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| Workstation Bootup (Bindery Mode) | |
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| Workstation Bootup (NDS Mode) | |
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| How SLIST Really Works | |
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| How Printing Really Works | |
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| Router Proxy GNS by Default | |
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| Common Problems and Fixes | |
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| Local Connectivity Problems | |
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| Connectivity Problems Through a Cisco Router | |
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| Intermittent Connectivity Problems | |
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| IPX NetBIOS Problems | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Apple's Apple Talk Protocol | |
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| The Evolution of AppleTalk | |
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| LocalTalk | |
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| Common Mac User Tasks | |
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| Bootup and Address Assignment | |
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| Zone Lists | |
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| Chooser Lists | |
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| Common AppleTalk Problems and Fixes | |
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| Routing Problems | |
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| Something Missing on the Network | |
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| AppleTalk Interface Goes Down | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Common Routing Protocols | |
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| Periodic Broadcast-Based Protocols | |
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| Routing Information Protocol (RIP) | |
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| Troubleshooting RIP | |
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| Cisco's Interior Gateway Routing Protocol (IGRP) | |
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| Troubleshooting IGRP | |
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| IPX RIP and Service Advertising Protocol (SAP) | |
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| Troubleshooting IPX RIP | |
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| AppleTalk Routing Table Maintenance Protocol (RTMP) | |
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| Troubleshooting AppleTalk Networks | |
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| Event-Driven Protocols | |
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| Open Shortest Path First (OSPF) | |
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| Troubleshooting OSPF | |
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| Cisco's Enhanced IGRP (EIGRP) | |
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| Troubleshooting EIGRP | |
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| Border Gateway Protocol (BGP) | |
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| Troubleshooting BGP | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Troubleshooting Tools | |
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| Using Router Diagnostic Tools | |
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| Telnet | |
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| Ping | |
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| Traceroute | |
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| Accounting | |
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| Router Web Interface | |
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| Router Logging | |
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| Introduction to Cisco Works | |
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| The Role of SNMP | |
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| SNMP Traps | |
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| Managing with Cisco Works | |
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| The Cisco Works Applications | |
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| Using Third-Party Tools | |
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| CMU SNMP Library | |
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| Packet Analyzers | |
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| Hardware Tools | |
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| Other Places to Find Troubleshooting Tools | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Cisco's Diagnostic Tools | |
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| Interface-Specific Commands | |
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| IP Interfaces | |
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| IPX Interfaces | |
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| AppleTalk Interfaces | |
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| WAN Interfaces | |
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| Memory and Process Commands | |
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| Buffer and Message-Logging Commands | |
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| Using Ping, Extended Ping, and Traceroute to Confirm Network Connectivity | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Advanced Diagnostic Tools | |
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| Debug Mode | |
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| Debug Mode Cautions | |
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| Debugging at the Protocol Level | |
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| Interface Debugging | |
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| Fault-Tracking Commands | |
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| Logging | |
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| Interconnectivity Commands | |
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| How to Perform a Core Dump | |
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| Hardware Diagnostics | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Campus Switches and VLANs | |
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| Interface Configuration | |
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| Speed and Duplex Detection | |
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| Security | |
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| Virtual LANs (VLANs) | |
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| VLAN Assignment | |
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| Virtual Trunking Protocol (VTP) | |
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| Inter-Switch Link (ISL) Trunks | |
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| Spanning Tree Protocol | |
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| BPDU Hello Packets | |
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| PortFast | |
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| UplinkFast | |
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| Troubleshooting with the Span Port | |
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| Spanning a Switch Port | |
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| Spanning a VLAN | |
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| Common Problems and Fixes | |
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| The SHOW Commands (CAM DYNAMIC, VLAN, MODULE, and PORT) | |
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| Disabled Ports | |
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| Missing VTP Domain | |
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| Deleted VLAN | |
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| 10/100 Autodetect Broken | |
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| Wrong Speed | |
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| Mismatched Duplex | |
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| Code Rev Not Supporting New Module | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Hands-on Troubleshooting | |
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| Troubleshooting LANs | |
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| Ethernet | |
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| Token Ring | |
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| Fiber Distributed Data Interface (FDDI) | |
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| Troubleshooting WANs | |
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| Serial Line Connections | |
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| ISDN | |
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| Frame Relay | |
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| Troubleshooting TCP/IP | |
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| Troubleshooting IPX | |
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| Troubleshooting AppleTalk | |
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| Using Cisco Support Functions | |
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| CCO Docs | |
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| CCO Open Forum | |
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| CD-ROM | |
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| Cisco Technical Assistance Center (TAC) | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Troubleshooting the ISDN Basic Rate Interface (BRI) | |
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| The ISDN Physical Layer | |
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| The ISDN CO Switch | |
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| The NT1 Device | |
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| Verifying Layer 1 Activation | |
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| The ISDN Data Link Layer (Q.921) | |
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| Q.921 Startup Procedures | |
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| Verifying LAPD Status | |
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| ISDN Layer 3: SPIDs | |
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| Configuring SPIDs | |
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| SPID Verification | |
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| Dial-on-Demand Routing (DDR) | |
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| Defining "Interesting" Traffic | |
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| Defining Whom to Call | |
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| Troubleshooting DDR | |
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| ISDN Q.931 for Call Setup and Teardown | |
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| Q.931 Call Establishment | |
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| Q.931 Setup Messages | |
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| Call Teardown | |
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| PPP: The Point-to-Point Protocol | |
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| The Link Control Protocol | |
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| The Network Control Protocols | |
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| Multilink PPP | |
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| Certification Summary | |
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| Two-Minute Drill | |
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| Self Test | |
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| Self Test Answers | |
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| Answers to Chapter 1 Self Test | |
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| Answers to Chapter 2 Self Test | |
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| Answers to Chapter 3 Self Test | |
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| Answers to Chapter 4 Self Test | |
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| Answers to Chapter 5 Self Test | |
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| Answers to Chapter 6 Self Test | |
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| Answers to Chapter 7 Self Test | |
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| Answers to Chapter 8 Self Test | |
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| Answers to Chapter 9 Self Test | |
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| Answers to Chapter 10 Self Test | |
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| Answers to Chapter 11 Self Test | |
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| Answers to Chapter 12 Self Test | |
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| Answers to Chapter 13 Self Test | |
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| About the CD | |
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| Personal Testing Center Test Type Choices | |
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| Live | |
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| Managing Windows | |
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| Saving Scores as Cookies | |
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| Using the Browser Buttons | |
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| JavaScript Errors | |
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| Practice | |
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| Review | |
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| Scoring | |
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| About the Web Site | |
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| Access Global Knowledge | |
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| What You'll Find There | |
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| Glossary | |
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| Index | |