Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

Cisco routers are everywhere that networks are. They come in all sizes, from inexpensive units for homes and small offices to equipment costing well over $100,000 and capable of routing at gigabit speeds. A fixture in today's networks, Cisco claims roughly 70% of the router market, producing high-end switches, hubs, and other network hardware. One unifying thread runs through the product line: virtually all of Cisco's products run the Internetwork Operating System, or IOS.

If you work with Cisco routers, it's likely that you deal with Cisco's IOS software--an extremely powerful and complex operating system, with an equally complex configuration language. With a cryptic command-line interface and thousands of commands--some of which mean different things in different situations--it doesn't have a reputation for being user-friendly.

Fortunately, there's help. This second edition of Cisco IOS in a Nutshell consolidates the most important commands and features of IOS into a single, well-organized volume that you'll find refreshingly user-friendly.

This handy, two-part reference covers IOS configuration for the TCP/IP protocol family. The first section includes chapters on the user interface, configuring lines and interfaces, access lists, routing protocols, and dial-on-demand routing and security. A brief, example-filled tutorial shows you how to accomplish common tasks.

The second part is a classic O'Reilly quick reference to all the commands for working with TCP/IP and the lower-level protocols on which it relies. Brief descriptions and lists of options help you zero in on the commands you for the task at hand. Updated to cover Cisco IOS Software Major Release 12.3, this second edition includes lots of examples of the most common configuration steps for the routers themselves. It's a timely guide that any network administrator will come to rely on.

1140202975
Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

Cisco routers are everywhere that networks are. They come in all sizes, from inexpensive units for homes and small offices to equipment costing well over $100,000 and capable of routing at gigabit speeds. A fixture in today's networks, Cisco claims roughly 70% of the router market, producing high-end switches, hubs, and other network hardware. One unifying thread runs through the product line: virtually all of Cisco's products run the Internetwork Operating System, or IOS.

If you work with Cisco routers, it's likely that you deal with Cisco's IOS software--an extremely powerful and complex operating system, with an equally complex configuration language. With a cryptic command-line interface and thousands of commands--some of which mean different things in different situations--it doesn't have a reputation for being user-friendly.

Fortunately, there's help. This second edition of Cisco IOS in a Nutshell consolidates the most important commands and features of IOS into a single, well-organized volume that you'll find refreshingly user-friendly.

This handy, two-part reference covers IOS configuration for the TCP/IP protocol family. The first section includes chapters on the user interface, configuring lines and interfaces, access lists, routing protocols, and dial-on-demand routing and security. A brief, example-filled tutorial shows you how to accomplish common tasks.

The second part is a classic O'Reilly quick reference to all the commands for working with TCP/IP and the lower-level protocols on which it relies. Brief descriptions and lists of options help you zero in on the commands you for the task at hand. Updated to cover Cisco IOS Software Major Release 12.3, this second edition includes lots of examples of the most common configuration steps for the routers themselves. It's a timely guide that any network administrator will come to rely on.

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Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

by James Boney
Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

Cisco IOS in a Nutshell: A Desktop Quick Reference for IOS on IP Networks

by James Boney

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Overview

Cisco routers are everywhere that networks are. They come in all sizes, from inexpensive units for homes and small offices to equipment costing well over $100,000 and capable of routing at gigabit speeds. A fixture in today's networks, Cisco claims roughly 70% of the router market, producing high-end switches, hubs, and other network hardware. One unifying thread runs through the product line: virtually all of Cisco's products run the Internetwork Operating System, or IOS.

If you work with Cisco routers, it's likely that you deal with Cisco's IOS software--an extremely powerful and complex operating system, with an equally complex configuration language. With a cryptic command-line interface and thousands of commands--some of which mean different things in different situations--it doesn't have a reputation for being user-friendly.

Fortunately, there's help. This second edition of Cisco IOS in a Nutshell consolidates the most important commands and features of IOS into a single, well-organized volume that you'll find refreshingly user-friendly.

This handy, two-part reference covers IOS configuration for the TCP/IP protocol family. The first section includes chapters on the user interface, configuring lines and interfaces, access lists, routing protocols, and dial-on-demand routing and security. A brief, example-filled tutorial shows you how to accomplish common tasks.

The second part is a classic O'Reilly quick reference to all the commands for working with TCP/IP and the lower-level protocols on which it relies. Brief descriptions and lists of options help you zero in on the commands you for the task at hand. Updated to cover Cisco IOS Software Major Release 12.3, this second edition includes lots of examples of the most common configuration steps for the routers themselves. It's a timely guide that any network administrator will come to rely on.


Product Details

ISBN-13: 9780596553111
Publisher: O'Reilly Media, Incorporated
Publication date: 08/22/2005
Series: In a Nutshell (O'Reilly)
Sold by: Barnes & Noble
Format: eBook
Pages: 798
File size: 3 MB

About the Author

Jim Boney has worked for the last eight years as a consultant specializing in a wide variety of subjects: network design, network management, Unix administration, and programming in various languages (Perl, Java, Tcl/Tk, and C/C++). For the last three years, he has been working on the vLab project, which allows complete access to Cisco routers over the Internet.

Table of Contents

Prefaceix
1Getting Started1
IOS User Modes2
Command-Line Completion5
Get to Know the Question Mark5
Command-Line Editing Keys6
Pausing Output7
Show Commands7
2IOS Images and Configuration Files11
IOS Image Filenames11
The New Cisco IOS Packaging Model14
Loading Image Files Through the Network17
Using the IOS Filesystem for Images21
The Router's Configuration25
Loading Configuration Files26
3Basic Router Configuration29
Setting the Router Name29
Setting the System Prompt30
Configuration Comments30
The Enable Password31
Mapping Hostnames to IP Addresses31
Setting the Router's Time32
Enabling SNMP34
Cisco Discovery Protocol35
System Banners36
4Line Commands38
The line Command38
The Console Port40
Virtual Terminals (VTYs)41
Asynchronous Ports (TTYs)42
The Auxiliary (AUX) Port43
Show line44
Reverse Telnet46
Common Configuration Items47
5Interface Commands49
Naming and Numbering Interfaces50
Basic Interface Configuration Commands51
The Loopback Interface54
The Null Interface55
Ethernet, Fast Ethernet, and Gigabit Ethernet Interfaces56
Token Ring Interfaces56
ISDN Interfaces57
Serial Interfaces59
Asynchronous Interfaces62
Interface show Commands64
6Networking Technologies71
Frame Relay71
ATM79
DSL87
Cable90
VoIP91
7Access Lists100
How Packets Match a List Entry102
Types of Access Lists106
Specific Topics114
8IP Routing Topics121
Autonomous System (AS) Numbers121
Interior and Exterior Gateway Protocols123
Distance-Vector and Link-State Routing Protocols123
Static Routes126
Split Horizon128
Passive Interfaces128
Fast Switching and Process Switching139
9Interior Routing Protocols144
RIP144
IGRP149
EIGRP155
OSPF167
IS-IS184
10Border Gateway Protocol193
Introduction to BGP193
A Simple BGP Configuration198
Route Filtering202
An Advanced BGP Configuration206
Neighbor Authentication211
Peer Groups211
Route Reflectors213
BGP Confederacies213
BGP TTL Security215
11Quality of Service216
Marking217
Older Queuing Methods219
Modern IOS QoS Tools224
Congestion Avoidance230
Traffic Policing232
Traffic Shaping234
AutoQoS235
QoS Device Manager237
12Dial-on-Demand Routing238
Configuring a Simple DDR Connection239
Sample Legacy DDR Configurations240
Dialer Interfaces (Dialer Profiles)246
Multilink PPP249
Snapshot DDR250
13Specialized Networking Topics256
Bridging257
Hot Standby Routing Protocol (HSRP)263
Network Address Translation (NAT)267
Tunnels274
Encrypted Tunnels277
Multicast Routing289
Multiprotocol Label Switching (MPLS)298
14Switches and VLANs305
Switch Terminology306
IOS on Switches313
Basic Switch Configuration314
Trunking318
Switch Monitor Port for IDS or Sniffers328
Troubleshooting Switches329
15Router Security330
Securing Enable Mode Access330
Routine Security Measures332
Restricting Access to Your Router336
16Troubleshooting and Logging342
Ping342
Trace345
Debugging346
Logging349
17Quick Reference353
Appendix731
Index743
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