Copyright

Abe Martey

Copyright 2002 Cisco Press

Published by:

Cisco Press

201 West 103rd Street

Indianapolis, IN 46290 USA

All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief quotations in a review.

Printed in the United States of America 1 2 3 4 5 6 7 8 9 0

First Printing February 2002

Library of Congress Cataloging-in-Publication Number: 99-67938

Warning and Disclaimer

This book is designed to provide information about IS-IS. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied .

The information is provided on an "as is" basis. The author, Cisco Press, and Cisco Systems, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book or from the use of the discs or programs that may accompany it.

The opinions expressed in this book belong to the author and are not necessarily those of Cisco Systems, Inc.

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Trademark Acknowledgments

All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Cisco Press or Cisco Systems, Inc. cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark.

Credits

Publisher

John Wait

Editor-in-Chief

John Kane

Cisco Systems Management

Michael Hakkert

Tom Geitner

William Warren

Production Manager

Patrick Kanouse

Acquisitions Editor

Tracy Hughes

Development Editor

Howard Jones

Project Editor

San Dee Phillips

Copy Editor

Keith Cline

Technical Editors

Blair Buchanan

Thomas Kramer

Team Coordinator

Tammi Ross

Book Designer

Gina Rexrode

Cover Designer

Louisa Klucznik

Compositor

Octal Publishing, Inc.

Indexers

Tim Wright

Brad Herriman

Corporate Headquarters

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USA

http://www.cisco.com

Tel: [phone]

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Fax: [phone]

European Headquarters

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92782 Issy-les-Moulineaux Cedex 9

France

http://www-europe.cisco.com

Tel: [phone]

Fax: [phone]

Americas Headquarters

Cisco Systems, Inc.

170 West Tasman Drive

San Jose, CA 95134-1706

USA

http://www.cisco.com

Tel: [phone]

Fax:[phone]

Asia Pacific Headquarters

Cisco Systems Australia, Pty., Ltd

Level 17, 99 Walker Street

North Sydney

NSW 2059 Australia

http://www.cisco.com

Tel: [phone]

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Cisco Systems has more than 200 offices in the following countries . Addresses, phone numbers, and fax numbers are listed on the Cisco Web site at www.cisco.com/go/offices

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Copyright 2000, Cisco Systems, Inc. All rights reserved. Access Registrar, AccessPath, Are You Ready, ATM Director, Browse with Me, CCDA, CCDE, CCDP, CCIE, CCNA, CCNP, CCSI, CD-PAC, CiscoLink, the Cisco Net Works logo, the Cisco Powered Network logo, Cisco Systems Networking Academy, Fast Step, FireRunner, Follow Me Browsing, FormShare, GigaStack, IGX, Intelligence in the Optical Core , Internet Quotient, IP/VC, iQ Breakthrough, iQ Expertise, iQ FastTrack, iQuick Study, iQ Readiness Scorecard, The iQ Logo, Kernel Proxy, MGX, Natural Network Viewer, Network Registrar, the Networkers logo, Packet, PIX, Point and Click Internetworking, Policy Builder, RateMUX, ReyMaster, ReyView, ScriptShare, Secure Script, Shop with Me, SlideCast, SMARTnet, SVX, TrafficDirector, TransPath, VlanDirector, Voice LAN, Wavelength Router, Workgroup Director, and Workgroup Stack are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, Empowering the Internet Generation, are service marks of Cisco Systems, Inc.; and Aironet, ASIST, BPX, Catalyst, Cisco, the Cisco Certified Internetwork Expert Logo, Cisco IOS, the Cisco IOS logo, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Collision Free, Enterprise/Solver, EtherChannel, EtherSwitch, FastHub, FastLink, FastPAD, IOS, IP/TV, IPX, LightStream, LightSwitch, MICA, NetRanger, Post-Routing, Pre-Routing, Registrar, StrataView Plus, Stratm, SwitchProbe, TeleRouter, are registered trademarks of Cisco Systems, Inc. or its affiliates in the U.S. and certain other countries.

All other brands, names , or trademarks mentioned in this document or Web site are the property of their respective owners . The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0010R)

Dedication

This book is dedicated to my affectionate mom, Emelia, for giving me her best.