CCNP学习指南:CISCO网络互连故障排除 下载 pdf 百度网盘 epub 免费 2025 电子版 mobi 在线

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CONTENTS

Foreword

About the Contributors

Acknowledgments

Preface

Introduction

1 Troubleshooting Methodology

Symptoms, Causes, and Actions

Slow Response Time

Performance Alerts and Notifications

Generic Problem-Solving Model

Steps to Solving a Problem

Pointers for Problem Solving

Recommended Troubleshooting Procedures

Documentation Methods

Protocol Charactenstics Review

Connection-Oriented vs. Connectionless

Certification Summary

Two-Minute Drill

SelfTest

2 LAN Troubleshooting Problem Areas

Physical Layer Responsibilities

Data Link Layer Responsibilities

MAC Layer

Logical Link Layer

Ethernet / IEEE 802.3

CSMA/CD Protocol

Ethernet Statistics for Troubleshooring

Token Ring / IEEE 802.5

Understanding MAC Communications

Troubleshooting Token Ring Necworks

FDDl

ATM LAN Emulation (LANE)

Encapsulation Methods

Certification Summary

Two-Minute Drill

SelfTest

3 WAN Troubleshooting Problem Areas

Point-to-Point Protocols

PPP Frame

LCP/NCP

Encapsulation

Authentication

Link States

SHOW INTERFACE and DEBUG Commands

HDLC

SDLC

PPP'

Switched Protocols

Frame Relay

X.25

SMDS

ATM

ISDN

Layer2ofISDN

Layer 3of lSDN

Certification Summary

Two-Minure Drill

SelfTest

4 The Internet Protocol (IP)

Technology Features Recap

A Note About Terminology

IP, UDP, TCP, lCMP, and Common Pons

A Closer Look at TCP

UDP

IP Broadcast and Mulricast

ICMP

ICMP Redirects

ARP Caching

DNS and DNS Caching

Default Gareway

IPHelperAddresses

Common User Tasks

Obtaining an Address via DHCP

Web Page Download

FTP Transfer

Common Problems and Fixes

Splitting the Problem in Half

Ping Test

Packet-Level Debugging

Troubleshooting Lower Layers

Transport and Above

Certification Summary

Two-Minute Drill

SelfTest

5 Novell's Intemetwork Packet Exchange (IPX)

Protocol

IPX Protocol Suite

IPX

SPX

NCP

LIP

Packet Burst

IPXNetBIOS

RIP

SAP

NLSP

Common Packet Types and Port Numbers

Common User Tasks

Workstation Bootup (Bindery Mode)

Workstation Bootup (NDS Mode)

How SLIST Really Works

How Printing Really Works

Router Proxy GNS by Default

Common Problems and Fixes

Local Connectivity Problems

Connectivity Problems Through a Cisco Router

Intermittent Connectivity Problems

IPX NetBlOS Problems

Certification Summary

Two-Minute Drill

SelfTest

6 Apple's AppleTalk Protocol

The Evolution ofAppleTalk

LocalTalk

Common Mac User Tasks

Bootup and Address Assignment

Zone Lists

Chooser Lists

Common AppleTalk Problems and Fixes

Routing Problems

Something Missing on the Network

AppleTalk Interface Goes Down

Certification Summary

Two-Minute Drill

SelfTest

7 Common Routing Protocols

Periodic Broadcast-Based Protocols

Routing Information Protocol (RlP)

Troubleshooting RlP

Cisco's Interior Gateway Routing Protocol (IGRP)

Troubleshooting IGRP

IPX RlP and Service Advertising Protocol (SAP)

Troubleshooring IPX RlP

AppleTalk Routing Table Maintenance

Protocol (RTMP)

Troubleshooring AppleTalk Nerworks

Event-Driven Protocols

Open Shortest Path First (OSPF)

Troubleshooting OSPF

Cisco's Enhanced IGRP (ElGRP)

Troubleshooring ElGRP

Border Gateway Protocol (BGP)

Troubleshooting BGP

Certification Summary

Two-Minute Drill

SelfTest

8 Troubleshooting Tools

Using Router Diagnostic Tools

Telnet

Ping

Traceroute

Accounting

Router Web Interface

Router Logging

Introduction to CiscoWorks

TheRoleofSNMP

SNMP Traps

Managing with CiscoWorks

The CiscoWorks Applications

Using Third-Party Tools

CMU SNMP Library

Packet Analyzers

Hardware Tools

Other Places to Find Troubleshooting Tools

Certification Summary

Two-Minute Drill

SelfTest

9 Cisco's Diagnostic Tools

Interface-Specific Commands

IP Interfaces

IPX Interfaces

AppleTalk Interfa

WAN Interfaces

Memory and Process Commands

Buffer and Message-Logging Commands

Using Ping, Extended Ping, and Traceroute to Confirm

Network Connectivity

Certification Summary

Two-Minute Drill

SelfTest

10 Advanced Diagnostic Tools

Debug Mode

Debug Mode Cautions

Debugging at the Protocol Level

Interface Debugging

Fault-Tracking Commands

Logging

Interconnectivity Commands

How to Perform a Core Dump

Hardware Diagnostics

Certification Summary

Two-Minute Drill

SelfTest

11 Campus Switches and VLANs

Interface Configuration

Speed and Duplex Detection

Security

Virtual LANs (VLANs)

VLAN Assignment

Virtual Trunking Protocol (VTP)

Inter-Switc Link (ISL) Trunks

Spanning Tree Protocol

BPDU Hello Packets

PortFast

UplinkFast

Troubleshooting with the Span Port

Spanning a Switch Port

Spanning a VLAN

Common Problems and Fixes

The SHOW Commands (CAM DYNAMIC, VIAN

MODULE.andPORT)

Disabled Ports

Missing VTP Domain

Deleted VLAN

10/100 Autodetect Broken

Wrong Speed

Mismatched Duplex

Code Rev Not Supporting New Module

Certification Summary

Two-Minute Drill

SelfTest

12 Hands-on Troubleshooting

Troubleshooting LANs

Ethernet

Token Ring

Fiber Distributed Data Interface (FDDI)

Troubleshooting WANs

Serial Line Connections

ISDN

Prame Relay

Troubleshooting TCP/IP

Troubleshooring IPX

Troubleshooting AppleTalk

Using Cisco Support Functions

CCO Docs

CCO Open Forum

CD-ROM

Cisco Technical Assistance Center (TAC)

Certification Summary

Two-Minute Drill

SelfTest

13 Troubleshooting the ISDN Basic Rate

Interface (BRI)

The ISDN Physical Layer

The ISDN CO Switch

The NTl Device

Verifying Layer 1 Activation

The ISDN Data Link Layer (Q.921)

Q.921 Startup Procedures

Verifying LAPD Status

ISDN Layer 3: SPIDs

Configuring SPIDs

SPID Verification

Dial-on-Demand Routing (DDR)

Defining "Interesting" Traffic

Defining Whom to Call

Troubleshooting DDR

ISDN Q.931 for Call Setup and Teardown

Q.931 Call Establishment

Q.931 Setup Messages

Call Teardown

PPP: The Point-to-Point Protocol

The Link Control Protocol

The Network Control Protocols

Multilink PPP

Certification Summary

Two-Minute Drill

SelfTest

A Self Test Answers

Answers to Chapter 1 SelfTest

Answers to Chapter 2 SelfTest

Answers to Chapter 3 SelfTest

Answers to Chapter 4 SelfTest

Answers to Chapter 5 SelfTest

Answers to Chapter 6 SelfTest

Answers to Chapter 7 SelfTest

Answers to Chapter 8 SelfTest

Answers to Chapter 9 SelfTest

Answers to Chapter 10 SelfTest

Answers to Chapter 11 SelfTest

Answers to Chapter 12 SelfTest

Answers to Chapter 13 SelfTest

B About the CD

Personal Testing Center Test Type Choices

Live

Managing Windows

Saving Scores as Cookies

Using the Browser Buttons

JavaScript Errors

Pracrice

Review

Scoring

C About the Web Site

Access Global Knowledge

What You'll Find There

Glossary

Index

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