OReilly.Cisco.IOS.in.a.Nutshell.2nd.Edition-2005.pdf

Cisco IOS in a Nutshell, 2nd Edition

By James Boney

...............................................

Publisher: O'Reilly

Pub Date: August 2005

ISBN: 0-596-00869-4

Pages: 796

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.

Table of Contents

Preface

Organization

What's New in This Edition

Conventions

Safari Enabled

We'd Like to

Hear from You

Acknowledgments

Chapter 1. Getting Started

Section 1.1. IOS User Modes

Section 1.2.

Command-Line Completion

Section 1.3. Get to Know the Question Mark

Section 1.4. Command-Line Editing Keys

Section 1.5. Pausing Output

Section 1.6. show Commands

Chapter 2. IOS Images and Configuration Files

Section

2.1. IOS Image Filenames

Section 2.2. The New Cisco IOS Packaging Model

Section 2.3. Loading Image Files Through

the Network

Section 2.4. Using the IOS Filesystem for Images

Section 2.5. The Router's Configuration

Section 2.6.

Loading Configuration Files

Chapter 3. Basic Router Configuration

Section 3.1. Setting the Router Name

Section

3.2. Setting the System Prompt

Section 3.3. Configuration Comments

Section 3.4. The Enable Password

Section

3.5. Mapping Hostnames to IP Addresses

Section 3.6. Setting the Router's Time

Section 3.7. Enabling SNMP

Section 3.8. Cisco Discovery Protocol

Section 3.9. System Banners

Chapter 4. Line Commands

Section 4.1. The

line Command

Section 4.2. The Console Port

Section 4.3. Virtual Terminals (VTYs)

Section 4.4. Asynchronous

Ports (TTYs)

Section 4.5. The Auxiliary (AUX) Port

Section 4.6. show line

Section 4.7. Reverse Telnet

Section 4.8. Common Configuration Items

Chapter 5. Interface Commands

Section 5.1. Naming and Numbering

Interfaces

Section 5.2. Basic Interface Configuration Commands

Section 5.3. The Loopback Interface

Section 5.4.

The Null Interface

Section 5.5. Ethernet, Fast Ethernet, and Gigabit Ethernet Interfaces

Section 5.6. Token Ring

Interfaces

Section 5.7. ISDN Interfaces

Section 5.8. Serial Interfaces

Section 5.9. Asynchronous Interfaces

Section 5.10. Interface show Commands

Chapter 6. Networking Technologies

Section 6.1. Frame Relay

Section

6.2. ATM

Section 6.3. DSL

Section 6.4. Cable

Section 6.5. VoIP

Chapter 7. Access Lists

Section 7.1.

How Packets Match a List Entry

Section 7.2. Types of Access Lists

Section 7.3. Specific Topics

Chapter 8. IP

Routing Topics

Section 8.1. Autonomous System (AS) Numbers

Section 8.2. Interior and Exterior Gateway Protocols

Section 8.3. Distance-Vector and Link-State Routing Protocols

Section 8.4. Static Routes

Section 8.5. Split Horizon

Section 8.6. Passive Interfaces

Section 8.7. Fast Switching and Process Switching

Chapter 9. Interior Routing

Protocols

Section 9.1. RIP

Section 9.2. IGRP

Section 9.3. EIGRP

Section 9.4. OSPF

Section 9.5. IS-

Chapter 10. Border Gateway Protocol

Section 10.1. Introduction to BGP

Section 10.2. A Simple BGP

Configuration

Section 10.3. Route Filtering

Section 10.4. An Advanced BGP Configuration

Section 10.5. Neighbor

Authentication

Section 10.6. Peer Groups

Section 10.7. Route Reflectors

Section 10.8. BGP Confederacies

Section 10.9. BGP TTL Security

Chapter 11. Quality of Service

Section 11.1. Marking

Section 11.2. Older Queuing

Methods

Section 11.3. Modern IOS QoS Tools

Section 11.4. Congestion Avoidance

Section 11.5. Traffic Policing

Section 11.6. Traffic Shaping

Section 11.7. AutoQoS

Section 11.8. QoS Device Manager

Chapter 12. Dial-on-

Demand Routing

Section 12.1. Configuring a Simple DDR Connection

Section 12.2. Sample Legacy DDR

Configurations

Section 12.3. Dialer Interfaces (Dialer Profiles)

Section 12.4. Multilink PPP

Section 12.5. Snapshot

DDR

Chapter 13. Specialized Networking Topics

Section 13.1. Bridging

Section 13.2. Hot Standby Routing

Protocol (HSRP)

Section 13.3. Network Address Translation (NAT)

Section 13.4. Tunnels

Section 13.5. Encrypted

Tunnels

Section 13.6. Multicast Routing

Section 13.7. Multiprotocol Label Switching (MPLS)

Chapter 14. Switches

and VLANs

Section 14.1. Switch Terminology

Section 14.2. IOS on Switches

Section 14.3. Basic Switch

Configuration

Section 14.4. Trunking

Section 14.5. Switch Monitor Port for IDS or Sniffers

Section 14.6.

Troubleshooting Switches

Chapter 15. Router Security

Section 15.1. Securing Enable Mode Access

Section 15.2.

Routine Security Measures

Section 15.3. Restricting Access to Your Router

Chapter 16. Troubleshooting and Logging

Section 16.1. ping

Section 16.2. trace

Section 16.3. Debugging

Section 16.4. Logging

Chapter 17. Quick

Reference

aaa accounting

aaa accounting delay-start

aaa accounting gigawords

aaa accounting nested

aaa

accounting resource

aaa accounting send stop-record authentication failure

aaa accounting session-duration ntp-adjusted

aaa accounting suppress null-username

aaa accounting update

aaa authentication attempts login

aaa authentication

banner

aaa authentication enable default

aaa authentication fail-message

aaa authentication local-override

aaa

authentication login

aaa authentication password-prompt

aaa authentication ppp

aaa authentication username-prompt

aaa authorization

aaa authorization config-commands

aaa authorization reverse-access

aaa authorization template

aaa configuration route

aaa group server radius

aaa group server tacacs+

aaa new-model

absolute-timeout

access-class

access-enable

access-list

access-list rate-limit

access-template

activation-character

aggregate-address

alias

area authentication

area default-cost

area nssa

area-password

area range

area stub

area virtual-link

arp (global)

arp (interface)

arp timeout

async-bootp

async default ip

address

async default routing

async dynamic address

async dynamic routing

async mode

atm address

atm arp-server

atm esi-address

atm lecs-address

atm lecs-address-default

atm nsap-address

atm pvc

atm-vc

autobaud

autocommand

autodetect encapsulation

autohangup

auto discovery qos

auto qos

voip

auto secure

autoselect

auto-summary

backup

bandwidth (interface)

bandwidth (policy-map)

banner exec

banner incoming

banner login

banner motd

bgp always-compare-med

bgp bestpath as-path

ignore

bgp bestpath med-confed

bgp bestpath missing-as-worst

bgp client-to-client reflection

bgp cluster-id

bgp confederation identifier

bgp confederation peers

bgp dampening

bgp default local-preference

bgp default

route-target filter

bgp deterministic med

bgp fast-external-fallover

bgp log-neighbor-changes

bgp-policy

bridge acquire

bridge address

bridge cmf

bridge crb

bridge forward-time

bridge-group

aging-time

bridge-group circuit-group

bridge-group input-address-list

bridge-group input-lsap-list

bridge-group

input-pattern

bridge-group input-type-list

bridge-group output-address-list

bridge-group output-lsap-list

bridge-

group output-pattern

bridge-group output-type-list

bridge-group path-cost

bridge-group priority

bridge-group

spanning-disabled

bridge hello-time

bridge irb

bridge max-age

bridge multicast-source

bridge priority

bridge protocol

bridge route

busy-message

cable helper-address

calendar set

callback forced-wait

cdp advertise-v2

cdp enable

cdp holdtime

cdp run

cdp timer

channel-group (controller)

channel-

group (interface)

chat-script

class (frame-relay)

class (MPLS)

class (policy-map)

class-map

clear

client-atm-address name

clock calendar-valid

clock rate

clock read-calendar

clock set

clock summer-time

clock timezone

clock update-calendar

compress

config-register

configure

controller

copy

crc

custom-queue-list

databits

data-character-bits

dce-terminal-timing enable

debug

default-

information

default-information originate

default-metric

default-name

delay

delete

description

dialer aaa

dialer callback-secure

dialer callback-server

dialer caller

dialer dtr

dialer enable-timeout

dialer fast-idle

dialer-group

dialer hold-queue

dialer idle-timeout

dialer in-band

dialer isdn

dialer-list

dialer load-threshold

dialer map

dialer map snapshot

dialer max-link

dialer pool

dialer pool-member

dialer priority

dialer remote-name

dialer rotary-group

dialer rotor

dialer string

dialer wait-for-carrier-

time

dialer watch-disable

dialer watch-group

dialer watch-list

dir

disable

disconnect

disconnect-

character

disconnect ssh

dispatch-character

distance

distance bgp

distance eigrp

distribute-list in

distribute-list out

domain-password

downward-compatible-config

down-when-looped

drop

dte-invert-txc

early-token-release

editing

eigrp log-neighbor-changes

enable

enable last-resort

enable password

enable secret

enable use-tacacs

encapsulation (ATM/MPLS)

encapsulation (interface)

end

erase

escape-character

exception core-file

exception dump

exception memory

exception protocol

exception

spurious-interrupt

exec

exec-timeout

exit

fair-queue (policy-map class)

fair-queue (interface)

fair-

queue aggregate-limit

fair-queue individual-limit

fair-queue limit

fair-queue qos-group

fair-queue tos

fair-

queue weight

fddi burst-count

fddi c-min

fddi cmt-signal-bits

fddi duplicate-address-check

fddi

encapsulate

fddi frames-per-token

fddi smt-frames

fddi tb-min

fddi tl-min-time

fddi token-rotation-time

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