1. Chapter 1 Getting Started

   1. IOS User Modes

   2. Command-Line Completion

   3. Get to Know the Question Mark

   4. Command-Line Editing Keys

   5. Pausing Output

   6. show Commands

2. Chapter 2 IOS Images and Configuration Files

   1. IOS Image Filenames

   2. The New Cisco IOS Packaging Model

   3. Loading Image Files Through the Network

   4. Using the IOS Filesystem for Images

   5. The Router's Configuration

   6. Loading Configuration Files

3. Chapter 3 Basic Router Configuration

   1. Setting the Router Name

   2. Setting the System Prompt

   3. Configuration Comments

   4. The Enable Password

   5. Mapping Hostnames to IP Addresses

   6. Setting the Router's Time

   7. Enabling SNMP

   8. Cisco Discovery Protocol

   9. System Banners

4. Chapter 4 Line Commands

   1. The line Command

   2. The Console Port

   3. Virtual Terminals (VTYs)

   4. Asynchronous Ports (TTYs)

   5. The Auxiliary (AUX) Port

   6. show line

   7. Reverse Telnet

   8. Common Configuration Items

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, Fast Ethernet, and Gigabit Ethernet Interfaces

   6. Token Ring Interfaces

   7. ISDN Interfaces

   8. Serial Interfaces

   9. Asynchronous Interfaces

   10. Interface show Commands

6. Chapter 6 Networking Technologies

   1. Frame Relay

   2. ATM

   3. DSL

   4. Cable

   5. VoIP

7. Chapter 7 Access Lists

   1. How Packets Match a List Entry

   2. Types of Access Lists

   3. Specific Topics

8. Chapter 8 IP Routing Topics

   1. Autonomous System (AS) Numbers

   2. Interior and Exterior Gateway Protocols

   3. Distance-Vector and Link-State Routing Protocols

   4. Static Routes

   5. Split Horizon

   6. Passive Interfaces

   7. Fast Switching and Process Switching

9. Chapter 9 Interior Routing Protocols

   1. RIP

   2. IGRP

   3. EIGRP

   4. OSPF

   5. IS-IS

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

    9. BGP TTL Security

11. Chapter 11 Quality of Service

    1. Marking

    2. Older Queuing Methods

    3. Modern IOS QoS Tools

    4. Congestion Avoidance

    5. Traffic Policing

    6. Traffic Shaping

    7. AutoQoS

    8. QoS Device Manager

12. Chapter 12 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

13. Chapter 13 Specialized Networking Topics

    1. Bridging

    2. Hot Standby Routing Protocol (HSRP)

    3. Network Address Translation (NAT)

    4. Tunnels

    5. Encrypted Tunnels

    6. Multicast Routing

    7. Multiprotocol Label Switching (MPLS)

14. Chapter 14 Switches and VLANs

    1. Switch Terminology

    2. IOS on Switches

    3. Basic Switch Configuration

    4. Trunking

    5. Switch Monitor Port for IDS or Sniffers

    6. Troubleshooting Switches

15. Chapter 15 Router Security

    1. Securing Enable Mode Access

    2. Routine Security Measures

    3. Restricting Access to Your Router

16. Chapter 16 Troubleshooting and Logging

    1. ping

    2. trace

    3. Debugging

    4. Logging

17. Chapter 17 Quick Reference

18. Chapter 18 About the Author

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, Second Edition 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 around 4,000 B.C. They're about four feet tall, and they're known for long ears, a 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 far distances that often separated them as they searched for sparse food sources in the African desert. Donkeys are relatives of the horse; although they are considerably smaller in stature than their cousins, they live longer, up to 25 or 30 years. They run as fast as 30 miles per hour.

Jamie Peppard was the production editor and proofreader for Cisco IOS in a Nutshell, Second Edition. Lydia Onofrei and Claire Cloutier provided quality control. Abby Fox provided production assistance. Ellen Troutman Zaig wrote the index.

Ellie Volckhausen 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. Karen Montgomery produced the cover layout with Adobe InDesign CS using Adobe's ITC Garamond font.

David Futato designed the interior layout. This book was converted by Keith Fahlgren from Word to FrameMaker 5.5.6. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano, Jessamyn Read, and Lesley Borash using Macromedia FreeHand MX and Adobe Photoshop CS. This colophon was written by Leanne Soylemez.