1. Chapter 1 Getting Started

   1. Introduction

   2. IOS User Modes

   3. Command-Line Completion

   4. Get to Know the Question Mark

   5. Command-Line Editing Keys

   6. Pausing Output

   7. show Commands

2. Chapter 2 IOS Images and Configuration Files

   1. IOS Images

   2. Using the IOS Filesystem for Images

   3. The Router's Configuration

   4. Loading Configuration Files

3. Chapter 3 Basic Router Configuration

   1. Configuration Soapbox

   2. Setting the Router Name

   3. Setting the System Prompt

   4. Configuration Comments

   5. The Enable Password

   6. Mapping Hostnames to IP Addresses

   7. Setting the Router's Time

   8. Enabling SNMP

   9. Cisco Discovery Protocol

   10. System Banners

4. Chapter 4 Line Commands

   1. What Is a Line?

   2. The line Command

   3. The Console Port

   4. Virtual Terminals (VTYs)

   5. Asynchronous Ports (TTYs)

   6. The Auxiliary (AUX) Port

   7. show line

5. Chapter 5 Interface Commands

   1. Naming and Numbering Interfaces

   2. Basic Interface Configuration Commands

   3. The Loopback Interface

   4. The Null Interface

   5. Ethernet and Fast Ethernet Interfaces

   6. Token Ring Interfaces

   7. ISDN Interfaces

   8. Serial Interfaces

   9. Asynchronous Interfaces

   10. Interface show Commands

6. Chapter 6 Frame Relay and ATM

   1. Frame Relay

   2. ATM

7. Chapter 7 Lists and Queues

   1. Access Lists

   2. Specific Topics

   3. Managing Priorities with Queues

8. Chapter 8 IP Routing Topics

   1. Routing Protocol Topics

   2. Static Routes

   3. Split Horizon

   4. Passive Interfaces

   5. Fast Switching and Process Switching

9. Chapter 9 Interior Routing Protocols

   1. RIP

   2. IGRP

   3. EIGRP

   4. OSPF

10. Chapter 10 Border Gateway Protocol

    1. Introduction to BGP

    2. A Simple BGP Configuration

    3. Route Filtering

    4. An Advanced BGP Configuration

    5. Neighbor Authentication

    6. Peer Groups

    7. Route Reflectors

    8. BGP Confederacies

11. Chapter 11 Dial-on-Demand Routing

    1. Configuring a Simple DDR Connection

    2. Sample Legacy DDR Configurations

    3. Dialer Interfaces (Dialer Profiles)

    4. Multilink PPP

    5. Snapshot DDR

12. Chapter 12 Special Topics

    1. Bridging

    2. Hot Standby Routing Protocol (HSRP)

    3. Network Address Translation (NAT)

    4. Tunnels

    5. Encrypted Tunnels

13. Chapter 13 Router Security

    1. The enable Password

    2. Features to Disable on Your Gateway Routers

    3. Use a Warning Banner

    4. Protect VTYs with an Access List

14. Chapter 14 Troubleshooting and Logging

    1. ping

    2. trace

    3. Debugging

    4. Logging

15. Chapter 15a Quick Reference A-H

16. Chapter 15b Quick Reference I-M

17. Chapter 15c Quick Reference N-Z

1. Colophon

Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects. The animal on the cover of Cisco IOS in a Nutshell is a donkey, Equus asinus, also known as a domesticated ass. Today's donkeys are probably descendants of the African wild ass, and they were domesticated by the Egyptians in around 4000 B.C. They're about four feet tall, and they're known for their long ears, the short mane that looks a bit like a push broom, and the braying noise they make. The big ears and braying enabled wild asses to keep in touch across the distances that often separated them as they searched for sparse food sources in the African desert. Donkeys are relatives of the horse; though they are considerably smaller in stature than their cousins, they live longer, up to 25-30 years. They can also run as fast as 30 miles per hour. Emily Quill was the production editor and Rachel Wheeler was the copyeditor for Cisco IOS in a Nutshell. Ann Schirmer and Sada Preisch provided quality control; Derek DiMatteo and Philip Dangler provided production assistance. Ellen Troutman wrote the index.

Hanna Dyer designed the cover of this book, based on a series design by Edie Freedman. The cover image is a 19th-century engraving from the Dover Pictorial Archive. Emma Colby produced the cover layout with Quark™XPress 4.1 using Adobe's ITC Garamond font.

Melanie Wang designed the interior layout, based on a series design by Nancy Priest. Mihaela Maier converted the files from Microsoft Word to FrameMaker 5.5.6 using tools created by Mike Sierra. The text and heading fonts are ITC Garamond Light and Garamond Book. The illustrations that appear in the book were produced by Robert Romano and Jessamyn Read using Macromedia FreeHand 9 and Adobe Photoshop 6. This colophon was written by Leanne Soylemez.