Ciscopress Bsci Exam Certification Guide2003

Cisco Press 201 W 103rd Street Indianapolis, IN 46290 Cisco Press CCNP Self-Study CCNP BSCI Exam Certification Guide Clare Gough chpt_01.book Page i Thursday, January 9, 2003 4:32 PM ii CCNP BSCI Exam Certification Guide Clare Gough Copyright © 2003 Cisco Systems, Inc. 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 per- mission 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 January 2003 Library of Congress Cataloging-in-Publication Number: 20-02115641 ISBN: 1-58720-078-3 Warning and Disclaimer This book is designed to provide information about building scalable Cisco networks. 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 lia- bility nor responsibility to any person or entity with respect to any loss or damages arising from the information con- tained 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. 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. 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We greatly appreciate your assistance. chpt_01.book Page ii Thursday, January 9, 2003 4:32 PM iii Publisher John Wait Editor-in-Chief John Kane Executive Editor Brett Bartow Cisco Representative Anthony Wolfenden Cisco Press Program Manager Sonia Torres Chavez Cisco Marketing Communications Manager Tom Geitner Cisco Marketing Program Manager Edie Quiroz Production Manager Patrick Kanouse Acquisitions Editor Michelle Grandin Development Editor Dayna Isley Drew Cupp Copy Editor Krista Hansing Keith Cline Technical Editors Jorge Aragon Timothy Sammut Steve Gifkins Brent Stewart Martin Walshaw Steve Wisniewski CD-ROM Question Authors David Barnes Martin Walshaw CD-ROM Technical Editors Steve Gifkins Mike Truett Team Coordinator Tammi Ross Book Designer Gina Rexrode Cover Designer Louisa Adair Production Team Mark Shirar Indexer Lisa Stumpf Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 European Headquarters Cisco Systems Europe 11 Rue Camille Desmoulins 92782 Issy-les-Moulineaux Cedex 9 France http://www- europe.cisco.com Tel: 33 1 58 04 60 00 Fax: 33 1 58 04 61 00 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-7660 Fax: 408 527-0883 Asia Pacific Headquarters Cisco Systems Australia, Pty., Ltd Level 17, 99 Walker Street North Sydney NSW 2059 Australia http://www.cisco.com Tel: +61 2 8448 7100 Fax: +61 2 9957 4350 Copyright © 2000, Cisco Systems, Inc. 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Access Registrar, AccessPath, Are You Ready, ATM Director, Browse with Me, CCDA, CCDE, CCDP, CCIE, CCNA, CCNP, CCSI, CD-PAC, CiscoLink, the Cisco NetWorks 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) 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 Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China • Colombia • Costa Rica • Croatia • Czech Republic • Denmark • Dubai, UAE • Finland • France • Germany • Greece • Hong Kong • Hungary • India • Indonesia • Ireland Israel • Italy • Japan • Korea • Luxembourg • Malaysia • Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines Poland • Portugal • Puerto Rico • Romania • Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain Sweden • Switzerland • Taiwan • Thailand • Turkey • Ukraine • United Kingdom • United States • Venezuela • Vietnam • Zimbabwe chpt_01.book Page iii Thursday, January 9, 2003 4:32 PM iv About the Author Clare Gough , CCIE No. 2893, has been a certified Cisco Systems instructor for the ICRC, ACRC, CIT, CLSC, and CID courses. She holds a master's degree in education and a master’s degree in information systems. Over the last 15 years, she has developed and taught a variety of networking and internetworking courses throughout the world for Digital Equipment Company and various Cisco training partners. She moved from England in 1991 and now lives in San Francisco with her family. About the Technical Reviewers Jorge Aragon, CCIE No. 5567, is a network engineer with Perot Systems Corporation (PSC) in Dallas, Texas. He holds a bachelor of science degree in electrical engineering from the National Polytechnic Institute in Mexico, and has a master of science degree in telecommunications from the University of Pittsburgh. He also holds an MCSE certification and several Cisco specializations. Jorge is part of the PSC Global Infrastructure team, where he designs, implements, and troubleshoots LAN and WAN networks for clients in multiple industries across the globe. He enjoys spending time with his wife and children, reading, jogging, and practicing martial arts. Jorge can be reached at jorge.aragon@ps.net. Steve Gifkins is a CCIE and CCSI of four and five years, respectively. He is based in the United Kingdom, where he runs his own independent Cisco-only consulting and training business. He is married with no children, and his hob- bies include anything to do with outdoor life. Having retired with a knee injury from playing active sports such as squash, rugby, and soccer, he has taken up new hobbies in horse eventing and show jumping. In addition, he enjoys skiing and hill scrambling. Tim Sammut , CCIE No. 6642, is a senior network engineer for ExtraTeam, a Cisco partner in San Francisco, Cali- fornia. Tim has served in key project roles involving technologies from LAN switching to security to SNA integra- tion and has helped many organizations, ranging from 100 to 130,000 users, make the most of their network investment. Tim also holds the CISSP, CCIE Security, MCNE, and MCSE certifications. Brent Stewart is a Cisco instructor for Global Knowledge. As a Global Knowledge employee, he participated in the development of ICND, BSCI, BCMSN, BCRAN, and CIT for Internet-based delivery and served as SME (Subject Matter Expert) for the CD-based ICND and CIT titles. He is currently participating in the BSCI 2.0 update as the lab development engineer. Prior to working for Global Knowledge, Brent owned an ISP and worked as an IT consultant. Brent holds the CCNP and CCDP certifications. Martin Walshaw , CCIE No. 5629, CCNP, CCDP, is a systems engineer working for Cisco Systems in the enterprise line of business in South Africa. His areas of specialty are multiservice (voice and video) as well as security, which keeps him busy both night and day. During the last 12 years or so, Martin has dabbled in many aspects of the IT industry, ranging from programming in RPG III and Cobol to PC sales. When Martin is not working, he likes to spend all his available time with his wife, Val, and his son, Joshua. Without their patience, understanding, and sup- port, projects such as this would not be possible. Steve Wisniewski is CCNP certified and has a master of science degree from Stevens Institute of Technology in telecom management. Steve works for Lehman Brothers as a senior implementation specialist implementing Cisco switches and routers. He has also previously edited several other Cisco books and authored a book titled Network Administration for Prentice Hall. Steve lives in East Brunswick, New Jersey, with his wife, Ellen. chpt_01.book Page iv Thursday, January 9, 2003 4:32 PM v Dedication This book is dedicated to David and Jack, who make everything worthwhile. chpt_01.book Page v Thursday, January 9, 2003 4:32 PM vi Acknowledgments All books are the product of a team, and I have been blessed with a dedicated and professional team, whose exper- tise in their given areas have made this book. Over the course of writing this book and its predecessor, I have come to think of members of this team as friends as well as colleagues. In particular, I would like to thank John Kane, the editor in chief, and Drew Cupp, the development editor, who were always there with solutions and support. My thanks go also to Amy Lewis for her understanding and flexibility. Of course, I thank all the members of the Cisco Press team helping to bring this book together, including the project editor, Marc Fowler, and the copy editor, Krista Hansing. The technical editors, Steve Gifkins, Martin Walshaw, Jorge Aragon, and Steve Wisniewski, were extremely thor- ough. Their careful attention to detail and constructive advice improved this book immeasurably. I would particu- larly like to thank Jorge Aragon and Steve Wisniewski who went the extra mile by testing configurations and producing output screens. I would also like to thank Wendell Odom, who led me into the art of book writing and has ever generously shared his expertise. Of course, I am immensely grateful to my husband, David, for his support, in spite of the long hours demanded by this book, and to our small son, Jack, for making me laugh and see the joy of life. chpt_01.book Page vi Thursday, January 9, 2003 4:32 PM vii Contents at a Glance Chapter 1 Cisco Certifications, the BSCI Exam, and This Book’s Features 3 Chapter 2 Managing Scalable Network Growth 27 Chapter 3 IP Addressing 83 Chapter 4 IP Routing Principles 157 Chapter 5 Using OSPF in a Single Area 205 Chapter 6 Using OSPF Across Multiple Areas 283 Chapter 7 Configuring the Integrated IS-IS Protocol 339 Chapter 8 Using EIGRP in Enterprise Networks 423 Chapter 9 Connecting to Other Autonomous Systems—The Basics of BGP-4 483 Chapter 10 Implementing and Tuning BGP for Use in Large Networks 539 Chapter 11 Controlling Routing Updates Across the Network 593 Chapter 12 Scenarios for Final Preparation 665 Appendix A Answers to Quiz Questions 771 Appendix B Sample Configurations 843 Appendix C Glossary 859 Index 903 chpt_01.book Page vii Thursday, January 9, 2003 4:32 PM viii Contents Chapter 1 Cisco Certifications, the BSCI Exam, and This Book’s Features 3 Goals of This Book 4 This Book’s Intended Audience 5 Prerequisites to Reading the Book 5 Overview of Cisco Certifications 6 Exams Required for Certification 8 What’s on the BSCI Exam 9 Cisco BSCI Exam Outline File Excerpts from Cisco.com 9 Author’s Note About Exam Content 12 Topics in This Book 13 How to Use This Book to Pass the Exam 15 I’ve Taken BSCI—Now What? 17 I’ve Taken the Cisco Networking Academy Courses—Now What? 17 I’m New to Internetworking with Cisco, and I Will Not Be Taking the BSCI Course—Now What? 18 I’ve Learned a Lot About CCNP Topics Through Experience, But I Will Not Be Taking the BSCI Course—Now What? 19 The Features of This Book 20 Command Syntax Conventions 20 References and Suggested Reading 21 Strategies for The Exam Day 21 Icons Used in This Book 22 Conclusion 24 Chapter 2 Managing Scalable Network Growth 27 How to Best Use This Chapter 27 “Do I Know This Already?” Quiz 28 Foundation Topics 32 Introduction to Corporate Networks—Growth, Scalability, and Congestion 32 Key Requirements of a Network 33 Reliability 33 chpt_01.book Page viii Thursday, January 9, 2003 4:32 PM ix Responsiveness 33 Efficiency 34 Adaptability/Serviceability 34 Accessibility/Security 34 Factors That Increase Network Traffic 35 Identifying the Problems Created by Network Congestion 35 Traffic Analysis and Network Design 35 Problems Created by Network Congestion 36 Excessive Traffic 36 Physical Problems of Ethernet 36 Dropped Packets 37 Retransmission of Packets 37 Incomplete Routing Tables 37 Incomplete Server Lists 38 The Spanning-Tree Protocol Breaks 38 Runaway Congestion 39 Symptoms of Congestion 39 Applications Time Out 40 Clients Cannot Connect to Network Resources 40 Network Death Results 40 Creating a Network That Meets the Key Requirements 40 Cisco’s Hierarchical Design 41 Why Scaling Reduces Congestion 41 How Hierarchical Is Hierarchical? 41 The Functions of Each Layer 41 The Access Layer 42 The Distribution Layer 42 The Core Layer 42 General Design Rules for Each Layer 42 IP Access Lists: Alleviating Congestion with Cisco Routers 43 Cisco Proprietary Solutions 44 Managing Network Congestion for IP 44 The Implementation of IP Access Lists 44 IP Access List Overview 45 Standard IP Access Lists 45 Extended IP Access Lists 46 Guidelines for Writing Access Lists 48 Verifying Filter Configuration 49 chpt_01.book Page ix Thursday, January 9, 2003 4:32 PM x Uses of IP Access Lists 51 Security Using Access Lists 51 Controlling Terminal Access 51 Configuration 52 Traffic Control Through Routing Updates 52 Prioritization 54 Types of Prioritization 54 Reducing Network Traffic: Alternatives to Access Lists 55 Null Interface 55 Configuration of Null Interfaces 55 Internet Example 55 Intranet Example 56 CPU Considerations and Additional Methods for Controlling Network Traffic 57 Fast, Autonomous, and Silicon Switching 58 Cisco Express Forwarding 58 Placement of Client/Server 59 Design Principles of a Client/Server Network 59 IP Helper Address 59 Configuration of IP Helper Address 60 Enhanced Interior Gateway Routing Protocol 60 Tunneling into IP 61 Configuration of Tunneling into IP 63 Conclusion 64 Foundation Summary 65 Chapter Glossary 68 Q & A 69 Scenarios 74 Scenario 2-1 74 Scenario 2-2 76 Scenario 2-3 76 Scenario Answers 77 Scenario 2-1 Answers 77 Scenario 2-2 Answers 78 Scenario 2-3 Answers 79 chpt_01.book Page x Thursday, January 9, 2003 4:32 PM [...]... #640-901 BSCI exam Building Scalable Cisco Internetworks (BSCI) #640-604 Switching exam Building Cisco Multilayer Switched Networks (BCMSN) #640-605 Remote Access exam Building Cisco Remote Access Networks (BCRAN) #640-841* Foundation exam BSCI, BCMSN, and BCRAN #640-606 Support exam Cisco Internetwork Troubleshooting (CIT) #640-901 BSCI exam BSCI #640-604 Switching exam BCMSN #640-605 Remote Access exam. .. question refresh, of the CCNP career certification exams The BSCI exam, originally required only for the CCIP certification, replaced the CCNP Routing exam #640-503 To certify for CCNP, you must pass multiple exams This book deals with the BSCI exam Sylvan Promteric exam #640-901 The qualifying exams, the CCNA and the CCDA, require only a single exam The exams generally match the same topics that are covered... Foundation exam BSCI, BCMSN, and BCRAN #640-025 CID exam Cisco Internetwork Design (CID) #640-901 BSCI BSCI #640-905 Implementing Cisco Multicast and QoS MCAST+QOS** CCDP CCIP Course Most Closely Matching Exam Requirements * Exam #640-841 meets the same requirements as passing these three exams: #640-901, #640-604, and #640-605 Therefore, you can substitute exam #640-841 for those three exams, but... 4 Chapter 1: Cisco Certifications, the BSCI Exam, and This Book’s Features The BSCI exam is not an easy exam This is to say that you cannot simply read one book and expect to pass it In fact, the exam is surprisingly difficult; this is so that Cisco can be sure that everyone who passes the test thoroughly understands the subject matter on a conceptual level and is not just good at exams More importantly,... in most cases—and certainly on the BSCI exam more topics are covered on the exam than are in the course Table 1-1 outlines the exams and the courses with which they are most closely matched Table 1-1 Exams and Courses by Certification Level Certification Exam Number Name CCNA #640-607 CCNA exam Interconnecting Cisco Network Devices (ICND) CCDA #640-861 DESGN (or CCDA) exam Designing for Cisco Internetworks... you can expect a longer exam that covers the material in the other three exams ** The CCIP certification requires an elective in addition to the two required exams See www.cisco.com/en/US/ learning/le3/le2/le37/le8/learning _certification_ type_home.html for details chpt_01.book Page 9 Thursday, January 9, 2003 4:32 PM What’s on the BSCI Exam 9 Be cautioned that, although the exam coverage and course... Press Exam Certification Guide can help you prepare for the certification exam, with the added guidance of stressing the most important exam items and coverage of other topics not taught in the prerequisite courses Cisco also maintains the right to change the exam content at will to ensure that the exam is current and fair What’s on the BSCI Exam Every one of us would like to know exactly what is on the BSCI. .. website The BSCI exam is a computer-based exam, with multiple-choice, fill-in-the-blank, and listin-order style questions The exam can be taken at any Sylvan Prometric testing center (1800-829-NETS, www.2test.com) You should check with Sylvan Prometric for the exact length of the exam (Be aware that when you register for the exam, you might be told to allow a certain amount of time to take the exam that... BSCI exam, as well as the other Cisco certification exams Well, to be honest, exactly what is on the exam is a very closely guarded secret Only those who write the questions for Cisco and who have access to the entire question database truly know what is entirely on the exam Cisco publicly only reveals general details about the contents and objectives of the BSCI exam You can find a list of Cisco exams... Cisco Career Certifications exam The BSCI course is the recommended method of preparation for the BSCI exam The topic areas listed in this outline are general guidelines for the type of content that is likely to appear on the exam However, please be advised that other relevant or related topic areas may also appear This list was taken from the Cisco.com website The BSCI (#640-901) exam will contain a combination . for Certification 8 What’s on the BSCI Exam 9 Cisco BSCI Exam Outline File Excerpts from Cisco.com 9 Author’s Note About Exam Content 12 Topics in This Book 13 How to Use This Book to Pass the Exam. Cisco Certifications, the BSCI Exam, and This Book’s Features 3 Goals of This Book 4 This Book’s Intended Audience 5 Prerequisites to Reading the Book 5 Overview of Cisco Certifications 6 Exams. 46290 Cisco Press CCNP Self-Study CCNP BSCI Exam Certification Guide Clare Gough chpt_01.book Page i Thursday, January 9, 2003 4:32 PM ii CCNP BSCI Exam Certification Guide Clare Gough Copyright