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CCNP TSHOOT 642-832 Official Certification Guide Kevin Wallace, CCIE No. 7945 Cisco Press 800 East 96th Street Indianapolis, IN 46240 CCNP TSHOOT 642-832 Official Certification Guide Kevin wallace, CCIE N Education, Inc. Publis I or 360 Indianapolis, IN 4624 , Swipe to r. t page book may be reprod c” any means, electroni 10 Pearson East 96th Street .

No part ofthis y form or by g photocopying, recording, or by any in ormation 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 First Printing February 201 0 Library f Congress Cataloging-in-publication Data: Wallace, Kevin, CCNP. CCNP TSHOOT 642-832 official certification guide / Kevin Wallace. p. cm. Includes index. ISBN-13: 978-1-58705-844-8 ISBN-IO: 1-58705-844-8 1.

Computer networks—Management— Examinations—Study guides. 2. Telecommunications engineers— Certification. 3. Cisco Systems, Inc. —Examinations—Study guides. l. Titie. TKS105. 8. CS7W3S 2010 004. 6076—dc22 Warning and Disclaimer This book is designed to provide information about the CCNP TSHOOT Exam (Exam 642-832) for the CCNP Routing and as possible, but no warranty or fitness is implied. The information s provided on an “as is” basis. The authors, Cisco Press, and Cisco Systems, Inc. hall 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, Inca Trademark Acknowledgments AII 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 ofthis nformation.

Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark- Corporate and Government Sales The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may include electronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U. S. Corporate and Government Sales 1-800-382-3419 corpsales@pearsontechgroup. com For sales outside the United States please contact: International Sales nternational@pearsoned. om Feedback Information At Cisco press, our goal is to create in-depth technlcal books of the highest quality and value. Each book is crafted with care and precislon, un PAGF 7 50 technical books ofthe highest quality and value. Each book is crafted with care and precision, undergoing rigorous development that involves the unique expertise of members from the professional technical community. Readers’ feedback is a natural continuation of this process. If you have any comments regarding how we could improve the quality ofthis book, or otherwise alter it to better suit your needs, you can contact us through e- ail at feedback@ciscopress. om. Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Publisher: Paul Boger Associate Publisher: Dave Dusthimer Executive Editor: Brett Bartow Managing Editor: Patrick Kanouse Senior Project Editor: Tonya Simpson Business Operation Manager, Cisco press: Anand Sundaram Manager Global Certification: Erik Ullanderson Copy Editors: Gill Editorial Services and Water Crest Publishing, Inc- Technical Editor: Elan Beer Proofreader: Williams Woods Publishing Semices, LLC Senior Development Editor: Christopher Cleveland Editorial

Assistant: Vanessa Evans Book Designer: Louisa Adair Composition: Mark Shirar Indexer: Tim Wrght CCV TSHOOT 642-832 Oficial Certification Guide About the Author Kevin Wallace, CCIE No. 7945, is a certified Cisco instructor who holds multiple Cisco certifications, including CCSP, CCVP, CCNP, and CCDP, in addition to multiple security and voice specializations. With Cisco experience dating back to 1989 (begnning with a Cisco AGS+ running Cisco IOS 7. ), Kevin PAGF 3 50 experience dating back to 1 989 (beginning with a Cisco AGS+ running Cisco IOS 7 x), Kevin has been a network design specialist or the Walt Disney World Resort, a senior technical instructor for SkillSofVThomson NETg/KnowledgeNet, and a network manager for Eastern Kentucky University. Kevin holds a bachelor of science degree in electrical engineering from the University of Kentucky. Kevin has authored multiple books for Cisco Press, including Routing Video Mentor and TSHOOT Video Mentor, both ofwhich target the current CCNP Routing and Switching certification.

Kevin lives in central Kentucky with his wife (Vivian) and two daughters (Stacie and Sabrina). About the Technical Reviewer Elan Beer, CCIE NO. 1837, CCSI NO. 94008, is a senior consultant nd Certified Cisco Instructor. His internetworking expertise is recognized internationally through his global consulting and training engagements. As one of the industry’s top internetworking consultants and Cisco instructors, Elan has used his expertise for the past 17 years to design, implement, and deploy multiprotocol networks for a wide international clientele.

As a senior instructor and course developer, Elan has deslgned and presented public and implementation-specfic technical courses spanning many of today’s top technologies. Elan specializes in MPLS, BGP, QoS, and other Internetworking echnologies. Dedications This book is dedicated to my family. To my beautiful wife Vivian, you have an unbelievably giving spirit. To my daughter Sabrina, you ha 350 To my beautiful wife Vivian, you have an unbelievably giving spirit.

To my daughter Sabrina, you have a keen business mind at only 12 years of age. You’re destined for big things. To my daughter Stacie, at the age of 14, you radiate happiness and are maturlng into a wonderfu young lady. Acknowledgments My thanks go out to the team of professionals at Cisco Press. l’m proud to be associated with such a respected organization. My amily is unbelievably supportive of my writing efforts. Thank you to my wife, Vivian, and my daughters, Sabrina and Stacie.

You all have been very understanding when I seclude myself to write. Also, l’m grateful to God for surroundlng me with such quality people, both personally and professionally. vi CCNP TSHOOT 642-832 Official certification Guide Contents at a Glance Foreword Introduction Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter g Chapter 10 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 15 AppendixA xvii xviii 3 27 51 79 107 139 167 225

Introduction to Network Maintenance Introduction to Troubleshooting Processes The Maintenance and Troubleshooting Toolbox Basic Cisco Catalyst Switch Troubleshooting Advanced Cisco Catalyst Switch Troubleshooting Introduction to Troubleshooting Routing Protocols OSPF and Route Redistribution Troubleshooting PAGF s 50 Troubleshooting 267 299 327 IP Services Troubleshooting IP Communications Troubleshooting IPv6 Troubleshooting 373 Advanced Services Troubleshooting 419 445 Large Enterprise Network Troubleshooting Final Preparation 473 Answers to the “Do Know ThlS Alreadyr Quizzes Glossary Index 483 79 497 CD-Only Appendixes Appendix B Appendix C Memory Tables Memory Tables Answer Key Contents Foreword xvii xviii 3 Introduction Chapter 1 Introduction to Network Maintenance “Do I Know This Already? ” Quiz Foundation Topics 77 7 3 Understanding Maintenance Methods Introducing Network Maintenance Proactive Versus Reactive Network Maintenance Well-Known Network Maintenance Mo Common Maintenance PAGF 6 350 Foundation Topics 31 31 31 Troubleshooting Methods 27 Defining Troubleshooting The Value of a Structured Troubleshooting Approach Popular Troubleshooting Methods The Top-Down Method 34 34 33

CCNP TSHOOT 642-832 Official Certification Guide Practice Exercise: Selecting a Troubleshooting Approach Using Troubleshooting Procedures Problem Report 40 40 40 42 41 Collect Information 39 38 Examine Collected Information Eliminate Potential Causes Verify Hypothesis Problem Resolution 42 43 Hypothesize Undertying Cause Including Troubleshooting in Routine Network Maintenance Maintaining Current Network Documentation Establishing a Baseline Change Management Exam Preparation Tasks 45 44 43 43 The Relationship Between Maintenance and Troubleshooting Tasks Communicating Throughout the Troubleshooting Process 46 48 8 48 48 51 48 45 Review All the Key Topics Definition of Key Terms Providing Notifications for Network Events Exam Preparation Tasks 73 73 74 Revjew Ali the KE2YTopics 70 Complete Tables and Lists from Memory ix Define Key Terms 74 74 79 Command Reference to Check Your Memory Chapter 4 Basic Cisco Catalyst Switch Troubleshooting “Do I Know This Already? ‘ Quiz Foundation Topics 81 81 81 88 90 VLAN Troubleshooting 79 Reviewing Layer 2 Switching Layer 2 Troubleshooting Techniques Spanning ree Protocol Troubleshooting Reviewing STP Operation STP Troubleshooting Issues Trouble Ticket: STP Trouble Ticket #1 Suggested Solution Exam Preparation Tasks 97 97 101 103 103 91 Collecting Information About an STP Topology 94 96 Troubleshooting EtherChannel 93 Review All the Key Topics Define Key Terms 1 03 103104 Command Reference to Check Your Memory Chapter 5 Advanced Cisco Catalyst Switch Troubleshooting 107 “Do Know This AlreadY? Quiz Foundation 110 110 107 Resolving InterVLAN Routi PAGF 8 50 Catalyst Switch Performance Troubleshooting Cisco Catalyst Switch Troubleshooting Targets TCAM Troubleshooting Trouble Ticket: HSRP Trouble Ticket #2 Suggested Solution Exam preparatlon Tasks Review Al Key Topics Define Key Terms 136 36 139 130 130 134 135 135 135 127 129 High CPU Utilization Level Troubleshooting 122 122 Command Reference to Check Your Memory Chapter 6 Introduction to Troubleshooting Routing Protocols “Do Know This Already? ” Quiz Foundation Topics 141 141 141 144 150 Layer 3 Troubleshooting 139 Basic Routing Processes EIGRP Troubleshooting Troubleshooting Basic Routing 149 152 Data Structures of IP Routing Protocols Data Structures of EIGRP EIGRP Operaticn Trouble Ticket: EIGRP Trouble Ticket Suggested Solution Exam preparation Tasks Review Al Key Topics Define Key Terrns 163 152 154 158 158 161 163 163 EIGRP Troubleshooting Commands 63163167 Command Reference to Check Your Memory Chapter 7 OSPF and Route Redistribution Troubleshooting “Do Know ThiS AlreadY? Quiz Foundation -ropics 170 170 170 178 OSPF Troubleshooting OSPF Data Structures OSPF Operation 171 167 PAGF 350 Trouble Ticket #5 Suggested Solution Exam Preparation Tasks 210 217 221 221 221 Trouble Tlcket: Route Redistribution with EIGRP and OSPF Review All the Key Topics Define Key Terms 222 Command Reference to Check Your Memory Chapter 8 222 225 Troubleshooting BGP and Router Performance Issues “Do I Know This Already7 Quiz Foundation Topics 227 227 230 227 BGP Troublesr,ooting Issues BGP Data structures -rrouble Ticket: BGP Trouble Ticket #6 Suggested Solution 225 BGP Troubleshooting Commands 236 236 242 245 245 Router Performance Issues Excessive CPU Utilization Processes That Commonly Cause Excessive CPU Utilization 246 Cisco IOS Commands Used for Troubleshooting High Processor Utilization 246 Understanding Packet Switching Modes Operation of process Switching Operation of Fast Switching 251 252 254 258 252 251 Operation of Cisco Express Forwarding Troubleshooting Packet Switching Modes Excessive Memo Utilization Excessive BGP 262 Revjew Ali the Key Memorv Use Exam Prepa PAGF