Cisco Routers for the Desperate, 2nd Edition: Router and Switch Management, the Easy Way

148 Pages·2009·5.91 MB·English

by  Michael W. Lucas

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T H E E A S Y W A Y
• How to implement basic network redundancy to EE
Cisco routers and switches are the cornerstones of many
reduce the risk of network downtime RR
networks. But when things break, repairs can intimidate
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even the most competent administrator. Luckily, just knowing Cisco Routers for the Desperate, 2nd Edition is designed
M I C H A E L W . L U C A S
the “in case of emergency” basics will take you far. to be read once and left alone until something breaks. FF
When it does, you’ll have everything you need to know OO
Just like the original, this second edition of the highly
in one easy-to-follow guidebook. RR
acclaimed Cisco Routers for the Desperate is written
for the administrator in crisis mode. Updated to cover ABOUT THE AUTHOR T T
switches and the latest Cisco terminology, with a tighter HH
Michael W. Lucas is a network/security engineer with
focus on the needs of the small network administrator, extensive experience working with high-availability EE
this second edition gives you what you need to know to
systems. He is the author of the critically acclaimed DD
provide reliable network services and fix problems fast.
Absolute FreeBSD, Absolute OpenBSD, and PGP &
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You’ll find coverage of:
GPG, all from No Starch Press.
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• Installation—how to get your router and network PP
connections up and running right the first time EE
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• Troubleshooting routers and switches, so that you
can determine whether your hardware or the Internet AA
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“I LAY FLAT.” $24.95 ($24.95 CDN) C
This book uses RepKover—a durable binding that won’t snap shut. NETWORKINGSHELVE IN: AS
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PRAISE FOR THE FIRST EDITION OF
CISCO ROUTERS FOR THE DESPERATE
“If you are a new network admin, or a systems person just exploring routers
and their use, this is a great investment. The tongue in cheek writing style and
excellent descriptions make it a generally good read.”
—ITWORLD
“The topics it covers are those that 95% of readers will need, and they’re
explained well enough, and in so few pages, that it’ll actually get read. Which
is a rare thing these days.”
—UNIX DAEMON
“Step-by-step directions, an informal writing style, and a reader-friendly
layout make the book especially useful.”
—BOOK NEWS
“This book isn’t a reference—it’s a survival guide, a ‘break glass in case of
emergency’ safety harness. . . . What I found remarkable was how it was
obviously written for people like me—who have little interest in router
management but whose jobs depend on the consistent, trusted functioning
of such infrastructure.”
—ASP.NETPRO
“Packed with essential information for all types of scenarios in dealing with
Cisco router problems.”
—HOSTINGRESOLVE.COM
“If only [Cisco Routers for the Desperate] had been on my bookshelf a few
yearsago! It would have definitely saved me many hours of searching for
configuration help on my Cisco routers.”
—BLOGCRITICS.ORG
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C I S C O R O U T E R S
F O R T H E D E S P E R A T E
™
2 N D E D I T I O N
Router and Switch
Management, the Easy Way
by Michael W. Lucas
San Francisco
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CISCO ROUTERS FOR THE DESPERATE, 2ND EDITION. Copyright © 2009 by Michael W. Lucas.
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior
written permission of the copyright owner and the publisher.
13 12 11 10 09 1 2 3 4 5 6 7 8 9
ISBN-10: 1-59327-193-X
ISBN-13: 978-1-59327-193-0
Publisher: William Pollock
Production Editor: Megan Dunchak
Cover and Interior Design: Octopod Studios
Developmental Editor: William Pollock
Technical Reviewer: Richard Bejtlich
Copyeditor: Kathleen Mish
Compositor: Riley Hoffman
Proofreader: Roxanna Usher
Indexer: Karin Arrigoni
For information on book distributors or translations, please contact No Starch Press, Inc. directly:
No Starch Press, Inc.
555 De Haro Street, Suite 250, San Francisco, CA 94107
phone: [phone]; fax: [phone]; [email protected]; www.nostarch.com
Library of Congress Cataloging-in-Publication Data:
Lucas, Michael, 1967-
Cisco routers for the desperate : router and switch management, the easy way / Michael W. Lucas. -- 2nd ed.
p. cm.
Includes index.
ISBN-13: 978-1-59327-193-0
ISBN-10: 1-59327-193-X
1. Routers (Computer networks) 2. Routing (Computer network management) 3. Cisco IOS. 4. Cisco Systems, Inc.
I. Title.
TK5105.543.L83 2009
004.6--dc22
2008050188
No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Other product and
company names mentioned herein may be the trademarks of their respective owners. Rather than use a trademark
symbol with every occurrence of a trademarked name, we are using the names only in an editorial fashion and to the
benefit of the trademark owner, with no intention of infringement of the trademark.
The information in this book is distributed on an “As Is” basis, without warranty. While every precaution has been
taken in the preparation of this work, neither the author nor No Starch Press, Inc. shall have any liability to any
person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the
information contained in it.
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To all those poor bastards who are awake at oh-dark-thirty
trying to get their router working.
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Thanks to Liz, for not smothering me in my sleep as I wrote
this book.
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B R I E F C O N T E N T S
Introduction....................................................................................................................1
Chapter 1: Befriending the Command Line.........................................................................7
Chapter 2: Router Configuration.....................................................................................11
Chapter 3: Router Interfaces...........................................................................................17
Chapter 4: Wide Area Network Connections...................................................................27
Chapter 5: Troubleshooting Routers.................................................................................41
Chapter 6: IOS Changes...............................................................................................57
Chapter 7: Redundancy with BGP and HSRP....................................................................65
Chapter 8: Cisco Switches.............................................................................................87
Chapter 9: Logins, Authentication, and Remote Access......................................................95
Chapter 10: Cisco Network Services.............................................................................103
Appendix: IP Addresses and Netmasks..........................................................................111
Index.........................................................................................................................115
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