Cisco Catalyst LAN Switching

This book covers switching from the basics to advanced features, such as multilayer switching, as they pertain to Cisco's Catalyst products. Because of the rapidly changing Catalyst product line, I was unable to include all the latest products. However, I am sure that this is one of the most up-to-date reference materials available.
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Cisco Catalyst LAN Switching Page i Cisco Catalyst LAN Switching Page ii McGRAW-HILL CISCO TECHNICAL EXPERT SERIES Albritton Cisco IOS Essentials 0-07-134743-7 Caputo Cisco Packetized Voice and Data Integration 0-07-134777-1 Fischer Configuring Cisco Routers for ISDN 0-07-022073-5 Held and Hundley Cisco Security Architectures 0-07-134708-9 Lewis Cisco Switched Internetworks:VLANs, ATM, and Voice/Data Integration 0-07-134646-5 Lewis Cisco TCP/IP Routing Professional Reference, 2/e 0-07-041130-1 Parkhurst Cisco Multicast Routing and Switching 0-07134647-3 Parkhurst Cisco Router OSPF 0-07-048626-3 Rossi Cisco and IP Addressing 0-07-134925-1 Sackett Cisco Router Handbook 0-07-058098-7 Slattery Advanced IP Routing with Cisco Networks 0-07-058144-4 Van Meter Cisco and Fore ATM Internetworking 0-07-134842-5 Page iii Cisco Catalyst LAN Switching Louis R. Rossi Louis D. Rossi and Thomas L. Rossi McGraw-Hill New York San Francisco Washington, D.C. Auckland Bogotá Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto Page iv Copyright © 2000 by The McGraw-Hill Companies, Inc. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a data base or retrieval system, without the prior written permission of the publisher. 1 2 3 4 5 6 7 8 9 0 DOC/DOC 9 0 4 3 2 1 0 9 0-07-134982-0 The sponsoring editor for this book was Steven Elliot, the editing supervisor was Ruth W. Mannino, and the production supervisor was Claire Stanley. It was set in New Century Schoolbook by Victoria Khavkina of McGraw-Hill's desktop composition unit in cooperation with Spring Point Publishing Services. Printed and bound by R. R. Donnelley & Sons Company Throughout this book, trademarked names are used. Rather than put a trademark symbol after every occurrence of a trademarked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringement of the trademark. Where such designations appear in this book, they have been printed with initial caps. Information contained in this work has been obtained by The McGraw-Hill Companies, Inc. (McGraw-Hill) from sources believed to be reliable. However, neither McGraw-Hill nor its authors guarantee the accuracy or completeness of any information published herein and neither McGraw-Hill nor its authors shall be responsible for any errors, omissions, or damages arising out of use of this information. This work is published with the understanding that McGraw-Hill and its authors are supplying information but are not attempting to render engineering or other professional services. If such services are required, the assistance of an appropriate professional should be sought. This book is printed on recycled, acid-free paper containing a minimum of 50% recycled de-inked fiber. Page v Contents Preface xi Acknowledgments xiii Chapter 1 1 Switching and Bridging Concepts Ethernet 2 Ethernet Frame Formats 5 Ethernet II 7 IEEE 802.3 with 802.2 Logical Link Control 7 IEEE 802.3 Sub-Network Access Protocol (Ethernet SNAP) 8 Novell Ethernet 8 Carrier Sense Multiple Access with Collision Detection 8 (CSMA/CD) (CSMA/CD) Fast Ethernet 9 Gigabit Ethernet 10 Full-Duplex Ethernet 11 Physical Segmentation 11 Broadcasts and Logical Segmentation 14 Multicasts 16 What Is the Difference between a Switch and a Bridge? 16 Frame-Forwarding Methods of a Switch 16 Bridges and Segmentation 17 Switches and Segmentation 18 Routers and Segmentation 21 Comparing Segmentation with Routers, Bridges, and Switches 21 What to Buy, Routers or Switches 23 How Many Nodes Should Be Placed on a Physical Segment? 23 How Many Nodes Should Be Placed on a Logical Segment? 24 Chapter 2 ...