Network Warrior SECOND EDITION Network Warrior Gary A. Donahue O'REILLY Beijing Cambridge Farnham . Köln Sebastopol Tokyo Network Warrior, Second Edition by Gary A. Donahue Copyright © 2011 Gary Donahue. All rights reserved. Printed in the United States of America. Published by O'Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472. O'Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles (http://my.safaribooksonline.com). For more information, contact our corporate/institutional sales department: (800) 998-9938 or corporate@oreilly.com. Editor: Mike Loukides Indexer: Lucie Haskins Production Editor: Adam Zaremba Cover Designer: Karen Montgomery Copyeditor: Amy Thomson Interior Designer: David Futato Proofreader: Rachel Monaghan Illustrator: Robert Romano Production Services: Molly Sharp Printing History: June 2007: First Edition. May 2011: Second Edition. Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered trademarks of O'Reilly Media, Inc. Network Warrior, the image of a German boarhound, and related trade dress are trademarks of O'Reilly Media, Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and O'Reilly Media, Inc. was aware of a trademark claim, the designations have been printed in caps or initial caps. While every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions, or for damages resulting from the use of the information con- tained herein. ISBN: 978-1-449-38786-0 [LSI] 1305147383 Table of Contents Preface 1. What Is a Network? 2. Hubs and Switches Switches Switch Types Planning a Chassis-Based Switch Installation 3. Autonegotiation What Is Autonegotiation? How Autonegotiation Works When Autonegotiation Fails Autonegotiation Best Practices Configuring Autonegotiation 4. VLANs Conn