组建Cisco远程接入网络：英文版

Chapter 1 Introduction

Part I：Introduction to Remote Access Networks

Part II：Identifying Cisco Solutions to Remote Access Needs

Part III：Enabling On-Demand Connections to the Central Site

Part IV：Enhancing On-Demand Connectivity

Part V：Enabling Permanent Connections to the Central Site

Part VI：Scaling Remote Access Networks

Appendixes

Case Studies and Review Questions

Who Should Read this Book?

Conventions Used in this Book

Illustration Iconography

Command Syntax Conventions

Author's Notes，Key Concepts，Notes，and Warnings

Chapter 2 electing Cisco Products for Remote Connections

Remote Access Overview

Defining WAN Connection Types

Dedicated Connections

Circuit-Switched Connections

Packet-Switched Connections

Defining WAN Encapsulation Protocols

PPP Encapsulation

X.25 and Frame Encapsulations

Determining the WAN Type to Use

Selecting WAN Configuration Types

WAN Connections-Speed Comparison

WAN Connections Summary

Identifying Site Requirements

Central Site Considerations

Branch Office Considerations

Telecommuter Site Considerations

Selecting Cisco Remote Access Solutions

Determining the Appropriate Interfaces-Fixed Interfaces

Determining the Appropriate Interfaces-Modular Interfaces

Selecting Products with Cisco Product-Selection Tools

Product Selection Tool Example

Summary

Review Questions

Chapter 3 Assembling and Cabling the WAN Components

Network Overview

Identifying Company Site Equipment

Central Site Router Equipment

Branch Office Router Equipment

Telecommuter Site Router Equipment

Assembling and Cabling the Network

Verifying Network Installation

Verifying Central Site Installation

Verifying Branch Office Installation

Verifying Telecommuter Site Installation

Summary

Review Questions

Chapter 4 Configuring Asynchronous Connections with Modems

Modem Overview

Modem Signaling and Cabling

Data Transfer Group

Flow Control Group

Modem Control Group

Communication Termination

Modem Operation

Communication Wiring and Cabling

Modem Modulation Standards

Error Control and Data Compression

Configuration for Asynchronous Connections

EXEC Connection Commands

Line Types and Numbering

Router Configuration

Interface Async and Line Configuration

Basic Async Configuration-Router Preparation

Basic Async Configuration-Modem Preparation

Manual Configuration of Modems

Automatic Configuration of Modems

Chat-Scripts for Async Lines

Verifying and Debugging Modem Autoconfiguration

Troubleshooting Modem Autoconfiguration

Summary

Case Study 4-1-Configuring Asynchronous Connections with Modems

Scenario

Task 1-Setting Up the Initial Configuration of the Central Site Router

Task 2-Configuring the Serial Interface and Line

Task 3-Configuring the Central Site Modem

Task 4-Configuring the PC Modem and Connecting to Central Site

Task 5-Simplifying Router Modem Configuration with Autoconfigure

Solution to Case Study 4-1-Configuring Asynchronous Connections with Modems

Task 1 Solution-Setting Up the Initial Configuration of the Central Site Router 92

Task 2 Solution-Configuring the Serial Interface and Line

Task 3 Solution-Configuring the Central Site Modem

Task 4 Solution-Configuring the PC Modem

Task 5 Solution-Simplifying Router Modem Configuration with Autoconfigure

Case Study Conclusion

Case Study 4-2-Configuring Remote WAN Routers

Scenario

Solution to Case Study 4-2-Configuring Remote WAN Routers

Solution Summary

Review Questions

Chapter 5 Configuring Point-to-Point Protocol and Controlling Network Access

PPP Overview

PPP Architecture

PPP Mechanisms

PPP Functional Components

Related RFCs

Configuring Cisco Access Servers

Enabling PPP

Configuring Dedicated or Interactive PPP (and SLIP) Sessions

Configuring the Interface Addressing Method for Local Devices

Configuring the Interface-Addressing Method for Remote Devices

PPP Link Control Protocol Options

PAP and CHAP Authentication

Configuring PAP Authentication

Configuring CHAP Authentication

PPP Callback

Callback：How Does it work?

Configuring Async Callback

PPP Compression

Configuring Compression

PPP Multilink

Multilink Operation and Configuration

Verifying and Troubleshooting PPP

Summary

Case Study-Configuring PPP and Controlling Network Access with CHAP 134 Scenario 134

Task 1-Configuring PPP on Your Central Site Router

Task 2-Configuring Your Central Site Router to Accept Telnet Connections

Task 3-Verifying Your PPP Configuration

Solution to Case Study-Configuring PPP and Controlling Network Access with CHAP

Task 1 Solution-Configuring PPP on Your Central Site Route r 136

Task 2 Solution-Configuring Your Central Site Router to Accept Telnet Connections 138

Task 3 Solution-Verifying Your PPP Configuration

Case Study Conclusion

Supplement 5-1-IP Address Negotiations

Supplement 5-2-Authentication Process with Windows 95 and Cisco Routers

Review Questions

Chapter 6 Accessing the Central Site with Windows 95

Windows 95 Dial-Up Networking Overview

The Basics

The Issues

LAN Connection Protocols

Configuring a Windows 95 Dial-Up Connection

Configuring a Windows 95 Dial-Up Client

Verifying a Windows 95 Dial-Up Connection

Summary

Configuring a Windows 95 Dial-Up Connection Using ISDN and DDR to Enhance Remote Connectivity

Scenario

Task 1-Setting Up Windows 95 with Your Network and Dialing

Task 2-Setting Dial-Up Connection Properties

Task 3-Making the Connection

Solution to Case Study-Configuring a Windows 95 Dial-Up Connection

Task 1 Solution-Setting Up Windows 95 with Your Network and Dialing

Task 2 Solution-Setting Dial-Up Connection Properties

Task 3 Solution-Making the Connection

Review Questions

Chapter 7 Using ISDN and DDR Technologies to Enhance Remote Connectivity

ISDN Overview

ISDN versus Asynchronous

SDN Services and Channelized E1 and T1

BRI Call Processing

BRI Functional Groups and Reference Points

PRI-Reference Points

ISDN Protocol Layers

ISDN Layer 1

ISDN Layer 2

ISDN Layer 3-Channel Q.931

ISDN Call Setup

ISDN Call Teardown

ISDN BRI and DDR Overview

Configuring an ISDN BRI 181

Step 1-Selecting the ISDN Switch Type

Step 2-Configuring the Interface

Step 3-Setting the Service Profile Identifiers (SPID)，If Necessary

Step 4-Setting the Encapsulation Protocol

Configuring Dial-on-Demand Routing (DDR)

Step 1-Defining what Constitutes Interesting Traffic

Step 2-Assigning the Dialer-List to an Interface

Step 3-Defining Destination Parameters

Step 4-Defining Optional Call Parameters

Static and Default Routing

Static Route

Default Route

Setting Route Redistribution

Deactivating Routing Updates

Configuring a Router for Initiating an ISDN Call

Using an Extended Access-List to Define a Dialer-List

Optional Configurations

B Channel Aggregation

ISDN Caller Identification

Called-Party Number Answering

ISDN Rate Adaptation

Monitoring the ISDN Interface

The show interface bri Command

The show isdn status Command

Verifying PPP Multilink

Troubleshooting Multilink PPP 208

ISDN debug Commands

ISDN Primary Rate Interface

Selecting the PRI switch

Selecting the ISDN PRI Controller for Configuration

Configuring the Framing，Linecoding，and Clocking of the Controller

Additional ISDN PRI Configuration Parameters

PRI Configuration Example

Summary

Case Study-Using ISDN and DDR to Enhance Remote Connectivity

Scenario

Task 1-Configuring ISDN BRI On Your Branch Office Router

Task 2-Configuring ISDN PRI on Your Central Site Router

Task 3-Verifying the ISDN Connection

Solution to Case Study-Using ISDN and DDR to Enhance Remote Connectivity

Task 1 Solution-Configuring ISDN BRI on your Branch Office Router

Task 2 Solution-Configuring ISDN PRI on Your Central Site Router

Task 3 Solution-Verifying the ISDN Connection

Case Study Conclusion

Review Questions

Chapter 8 Optimizing the Use of DDR Interface-Dialer Profiles and Rotary Groups

Dialer Rotary Overview

Creating and Configuring a Rotary Group

Configuring the Interface Dialer

Dealing with Dialer Timers

Dialer Profile Overview

Components of Dialer Profile

Example of Dialer Profile Configuration

Verifying a Dialer Profile Configuration

Summary

Case Study-Using Dialer Profiles to Enhance DDR

Scenario

Task

Solution to Case Study-Using Dialer Profiles to Enhance DDR

Case Study Conclusion

Review Questions

Chapter 9 Configuring a Cisco 700 Series Router

Cisco 700 Series Overview

Cisco 700 Series Features

Networking Features

Routing and WAN Features

ISDN and Telephony Features

Cisco IOS-700 Release 4.x-Summary of Features

Profile Overview

Cisco 700 User Interface

Configuring the Cisco 700 Series

System Level Configuration

LAN Profile Configuration

User Profile Configuration

Cisco 700-Configuration Example

Additional Interface Configuration

Caller ID

PPP Callback-No Authorization

PPP Callback-Receive Number Authorization

Cisco 700 and Cisco IOS Configuration Examples

IP Traffic with CHAP Authentication between a Cisco 700 and an IOS-Based Router 281

IP Traffic with PAP Authentication between Two Cisco 700s

IPX Traffic with CHAP Authentication between a Cisco 700 and an IOS-based Router 286

Authentication Quick Reference Guide

Monitoring IP Routing

Cisco 700 Series and DHCP

Cisco 700-DHCP Functionality

Summary

Case Study-Configuring a Cisco 700 Series Router

Scenario

Task 1-Resetting the Cisco 700 to Default Settings

Task 2-Configuring the Cisco 700 to Communicate with the Central Site Router

Task 3-Configuring the Cisco 3640 to Communicate with the Cisco 700

Task 4-Placing a Manual ISDN Call from the Cisco 700

Task 5-Configuring the Cisco 700 to Receive Incoming Calls from the Central Site 299

Solution to Case Study-Configuring a Cisco 700 Series Router

Task 1 Solution-Resetting the Cisco 700 to Default Settings

Task 2 Solution-Configuring the Cisco 700 to Communicate with the Central Site Router 300

Task 3 Solution-Configuring the Cisco 3640 to Communicate with the Cisco 700

Task 4 Solution-Placing a Manual ISDN Call from the Cisco 700

Task 5 Solution-Configuring the Cisco 700 to Receive Incoming Calls from the Central Site

Case Study Conclusion

Review Questions

Chapter 10 Using X.25 for Remote Access

X.25 Overview

X.25 Protocol Stack

X.25 DTE and DCE

The Packet Assembler/Deassembler (PAD)

X.121-The X.25 Addressing Standard

X.25 Encapsulation

X.25 Virtual Circuits

Single Protocol Virtual Circuits

Multiprotocol Virtual Circuits

Configuring X.25

Configuring the X.121 address

Configuring X.25 SVCs

Configuring X.25 PVCs

Additional X.25 Configuration Tasks

Configuring X.25 VC Ranges

Configuring X.25 Packet Sizes

Configuring Window Parameters

Additional X.25 Configuration Options Example

Verifying X.25 Configuration

Summary

Case Study-Using X.25 for Remote Access

Scenario

Task 1-Configuring X.25 at the Central Site

Task 2-Configuring X.25 at the Branch Office

Solution to Case Study-Using X.25 for Remote Access

Task 1 Solution-Configuring X.25 at the Central Site

Task 2 Solution-Configuring X.25 at the Branch Office

Review Questions

Chapter 11 Frame Relay Connection and Traffic Flow Control

Frame Relay Overview

Frame Relay Operation

Frame Relay Signaling

Configuring Frame Relay

Verifying Frame Relay Configuration and Operations

show interface serial Command

show frame-relay pvc Command

show frame-relay map Command

show frame-relay lmi Command

Frame Relay Topologies

Reachability Issues with Routing Updates

Solution for Split Horizon Issues-Subinterfaces

Configuring Frame Relay Subinterfaces

Frame Relay Traffic-Shaping Overview

Traffic Shaping and Flow Terminology

Using Traffic Shaping over Frame Relay

Configuring Frame Relay Traffic Shaping

Ways to Define a Map Class

Traffic Shaping Examples

Rate Enforcement Example

Dynamic Enforcement Example

Queuing Example

Verifying Frame Relay Traffic Shaping

Case Study-Establishing a Dedicated Frame Relay Connection and Controlling Traffic Flow

Scenario

Task 1-Configuring Frame Relay Subinterfaces on the Central Site Router

Task 2-Configuring Frame Relay on the Branch Office Router

Task 3-Verifying Frame Relay Operation

Task 4-Enabling Frame Relay Traffic-Shaping BECN Support from the Central Site

Solution to Case Study-Establishing a Dedicated Frame Relay Connection and Controlling Traffic Flow

Task 1 Solution：Configuring Frame Relay Subinterfaces on the Central Site Router 372

Task 2 Solution-Configuring Frame Relay on the Branch Office Router

Task 3 Solution-Verifying Frame Relay Operation

Task 4 Solution-Enabling Frame Relay Traffic-Shaping BECN Support from the Central Site

Case Study Conclusion

Review Questions 377

Chapter 12 Enabling Backup to a Permanent Connection

Dial Backup Overview

Configuring Dial Backup

Example of Dial Backup for Link Failure

Activating a Dial Backup to Support Primary Line Traffic

Example of Dial Backup for Excessive Traffic Load

Backup Interface Operations

Dialer Profiles as Backup Interfaces

Configuring Dial Backup with Dialer Profiles

Routing with the Load Backup Feature

Load Backup with OSPF

Load Backup with IGRP and EIGRP

Verifying Dial Backup Configuration

Summary

Case Study-Enabling a Backup to a Permanent Connection

Scenario

Task 1-Prepare the Branch Office Router's BRI Interface to Be a Dial Backup

Task 2-Establish a Backup Connection for the Central Site's Frame Relay Link

Task 3-Verify and Enable the Dial Backup

Solution to Case Study-Enabling a Backup to a Permanent Connection

Task 1 Solution-Prepare the Branch Office Router's BRI Interface to Be a Dial Backup 394

Task 2 Solution-Establish a Backup Connection for the Central Site's Frame Relay Link

Task 3 Solution-Verify and Enable the Dial Backup

Case Study Conclusion

Review Question

Chapter 13 Managing Network Performance with Queuing and Compression

Queuing Overview

The Need for Traffic Prioritization

Establishing a Queuing Policy

Choosing a Cisco IOS Queuing Option

First In，First Out Queuing Overview

Weighted Fair Queuing Overview

Configuring Weighted Fair Queuing

Priority Queuing Overview

Configuring Priority Queuing

Custom Queuing Overview

Custom Queuing Operation

Configuring Custom Queuing

Custom Queuing Example

Verifying Queuing Operation

Queuing Comparison

Optimizing Traffic Flow with Data Compression

Compression Overview

Link Compression Over a Point-to-Point Connection

Payload Compression

TCP IP Header Compression

Microsoft Point-to-Point Compression

Compression Considerations

Configuring Data Compression

Summary

Case Study-Managing Network Performance with Queuing and Compression

Scenario

Task 1-Devise a Queuing Strategy

Task 2-Verify Your Queuing Configuration

Solution to Case Study-Managing Network Performance with Queuing and Compression 426

Task 1 Solution-Devise a Queuing Strategy

Task 2 Solution-Verify Your Queuing Configuration

Example of Custom Queue Configuration

Case Study Conclusion

Review Questions

Chapter 14 Scaling IP Addresses with Network Address Translation

NAT Overview and Terminology

NAT Implementation Considerations

NAT Operation

Traffic Types Supported in Cisco IOS NAT

Translating Inside Local Addresses

Overloading Inside Global Addresses

TCP Load Distribution

Handling Overlapping Networks

Configuring NAT

Static NAT Configuration

Dynamic NAT Configuration

Inside Global Address Overloading Configuration

TCP Load Distribution Configuration

NAT to Translate Overlapping Addresses Configuration

Verifying and Troubleshooting NAT

Verifying NAT

Troubleshooting NAT

Clearing NAT Translation Entries

Configuring and Troubleshooting PAT On the 700 Router

PAT Porthandler Operation 4 55

Configuring PAT

Monitoring PAT

Summary

Case Study-Scaling IP Addresses with Network Address Translation

Scenario

Task 1-Configuring Static Network Address Translation on the Branch Office Router 458

Task 2-Configuring Dynamic Network Address Translation on the Branch Office Router 458

Solution to Case Study-Scaling IP Addresses with Network Address Translation

Task 1 Solution-Configuring Static Network Address Translation on the Branch Office Router

Task 2 Solution-Configuring Dynamic Network Address Translation on the Branch Office Router

Case Study Conclusion

Review Questions

Chapter 15 Using AAA to Scale Access Control in an Expanding Network

Overview of Cisco Access Control Solutions

Overview of Cisco Secure

Understanding AAA

Router Access Modes

Configuring AAA

Enabling AAA and Identifying the Server

AAA Authentication Commands

AAA Authorization Commands

AAA Accounting Commands

AAA and Virtual Profiles

Summary

Case Study-Using AAA to Scale Access Control in an Expanding Network

Scenario

Task 1-Configure the Central Site Access Server for AAA

Task 2-Verify the Console Back Door

Task 3-Verify that a Valid Network Login Attempt Will Succeed

Task 4-Verify that an Invalid Network Login Attempt Fails

Case Study Solution-Using AAA to Scale Access Control in an Expanding Network

Task 1-Configure the Central Site Access Server for AAA

Task 2-Verify the Console Back Door

Task 3-Verify that a Valid Network Login Attempt will Succeed 483

Task 4- Verify that an Invalid Network Login Attempt Fails

Case Study Conclusion 484

Review Questions

Appendix A Summary of BCRAN Commands

General Commands

General Configuration Commands

General Interface Configuration Commands

General IP Commands

IP Interface Configuration Command

General AAA Commands

General Line Configuration Commands

Map-Class Command

T1/E1 Controller Commands

General WAN Commands

WAN Configuration Commands

Cisco 700 IOS System Commands

Cisco 700 IOS Profile Commands

Appendix B Summary of ICRC Commands

General Commands 503

General Configuration Commands

General Interface Configuration Commands

General IP Commands

IP Configuration Commands

General IPX Commands

IPX Configuration Commands

General AppleTalk Commands

AppleTalk Configuration Commands

General WAN Commands

WAN Configuration Commands

General DECnet Commands

DECnet Configuration Commands

General Vines Commands

Vines Configuration Commands

Appendix C Open Systems Interconnection(OSI) Reference Model

Characteristics of the OSI Layers

Protocols

OSI Model and Communication Between Systems

Interaction between OSI Model Layers

OSI Layer Services

OSI Model Layers and Information Exchange

OSI Model Physical Layer

OSI Model Data Link Layer

OSI Model Network Layer

OSI Model Transport Layer

OSI Model Session Layer

OSI Model Presentation Layer

OSI Model Application Layer

Information Formats

Appendix D AT Commands for Modems and Chat-Scripts

Entering AT Commands

AT Command Sets

Modem Troubleshooting Tips

Sample Modem Scripts

Appendix E RFC List

Appendix F Emerging and Complementary Technologies

Cable Modems

XDSL

VPN and Layer 2 Tunneling Protocol

Mobile IP

Easy IP

Cisco DialOut Utility

Multichassis Multilink PPP

X.25 Over D Channel

Appendix G X.25 and Frame Relay Switching

Setting Up the Router as an X.25 Switch

Complete X.25 Switch Configuration

Setting up the Router as a Frame Relay Switch

Configuring Switching

Frame Relay Switching Example

Complete Frame Relay Switch Configuration

Appendix H Answers to Review Questions

Chapter 2-Selecting Cisco Products for Remote Connections

Chapter 3-Assembling and Cabling the WAN Components

Chapter 4-Configuring Asynchronous Connections with Modems

Chapter 5-Configuring Point-to-Point Protocol and Controlling Network Access

Chapter 6-Accessing the Central Site with Windows 95

Chapter 7-Using ISDN and DDR Technologies to Enhance Remote Connectivity

Chapter 8-Optimizing the Use of DDR Interface-Dialer Profiles and Rotary Groups

Chapter 9-Configuring a Cisco 700 Series Router

Chapter 10-Using X.25 for Remote Access

Chapter 11-Frame Relay Connection and Traffic Flow Control

Chapter 12-Enabling Backup to a Permanent Connection

Chapter 13-Managing Network Performance with Queuing and Compression

Chapter 14-Scaling IP Addresses with Network Address Translation

Chapter 15-Using AAA to Scale Access Control in an Expanding Network

Appendix I BCRAN Case Study Addresses and Dial-Up Phone Numbers

Overview

BCRAN Case Study Addresses and Dial-Up Phone Number Matrix，Part I

BCRAN Case Study Addresses and Dial-Up Phone Number Matrix，Part II

Pod Topology

Glossary

Index