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CCNP Enterprise Design ENSLD 300-420 Official Cert Guide: Designing Cisco Enterprise Networks (2020)

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    CCNP Enterprise Design ENSLD 300-420 Official Cert Guide Designing Cisco Enterprise Networks Anthony Bruno, CCIE No. 2738 Steve Jordan, CCIE No. 11293

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    CCNP Enterprise Design ENSLD 300-420 Official Cert Guide: Designing Cisco Enterprise Networks Anthony Bruno Steve Jordan Copyright© 2021 Published by: Cisco Press and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permissions, request forms, and the appropriate contacts within the Pearson Education Global Rights & Permissions Department, please visit www.pearson.com/permissions. No patent liability is assumed with respect to the use of the information contained herein. Although every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions. Nor is any liability assumed for damages resulting from the use of the information contained herein. ScoutAutomatedPrintCode

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    Library of Congress Control Number: 2020906746 ISBN-13: 978-0-13-657519-1 ISBN-10: 0-13-657519-6 Warning and Disclaimer This book is designed to provide information about the CCNP Enterprise Design ENSLD 300-420 exam. 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 authors, 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. 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. Special Sales

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    For information about buying this title in bulk quantities, or for special sales opportunities (which may include electronic versions; custom cover designs; and content particular to your business, training goals, marketing focus, or branding interests), please contact our corporate sales department at corpsales@pearsoned.com or (800) 382-3419. For government sales inquiries, please contact governmentsales@pearsoned.com. For questions about sales outside the U.S., please contact intlcs@pearson.com. Feedback Information At Cisco Press, our goal is to create in-depth technical books of the 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 of this book, or otherwise alter it to better suit your needs, you can contact us through email at feedback@ciscopress.com. Please make sure to include the book title and ISBN in your message. We greatly appreciate your assistance. Editor-in-Chief: Mark Taub

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    Alliances Manager, Cisco Press: Arezou Gol Director, Product Management: Brett Bartow Executive Editor Nancy Davis Managing Editor Sandra Schroeder Development Editor Ellie Bru Project Editor Mandie Frank Copy Editor Kitty Wilson Technical Editors Kevin Yudong Wu, James Hill Editorial Assistant Cindy Teeters Designer Chuti Prasertsith Composition codeMantra

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    About the Authors Anthony Bruno, CCIE No. 2738 , is an architect and technical resource manager with British Telecom (BT) with more than 27 years of experience in the internetworking field. Previously, he worked for International Network Services (INS) and Lucent Technologies, and he was a captain in the U.S. Air Force. He has consulted for many enterprise and service provider customers in the design, implementation, and optimization of large-scale networks. Anthony leads architecture and design teams in building next- generation networks for customers. Anthony completed a master of science degree in electrical engineering at the University of Missouri–Rolla in 1994 and a bachelor of science in electrical engineering at the University of Puerto Rico–Mayaguez in 1990. For the past 20 years, he has coauthored five editions of the CCDA Official Cert Guide for Cisco Press. Outside work, Anthony enjoys running marathons and Spartan obstacle races, and he has finished seven Ironman distance triathlons. He is also an avid genealogist and ancestry tree researcher. Anthony also enjoys piloting his Mavic Pro drone during trips.

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    Steve Jordan, CCIE No. 11293 , is a principal architect with J. Network Architects and has 23 years of experience in the field of internetworking. For the past 10 years, Steve has specialized in data center and network security architectures involving compute, network, security, storage, and virtualization. Over the years, Steve has worked with many enterprise and service provider customers in both presales and postsales engineering and architecture roles, and he has worked at several Cisco Gold Partners. He has extensive experience in data center and security architecture design and has implemented solutions in many financial, energy, retail, healthcare, education, and telecommunications industries. Steve is a 15-year triple CCIE in the tracks of Routing & Switching, Storage Networking, and Data Center. His other certifications include CCNA, CCNP Enterprise, VMware VCIX6-NV, and VCP6-NV. Steve lives in Houston, Texas, and when he is not working on technology, he can be found traveling to new places, homebrewing, and trading stocks. Over the past 14 years, Steve has coauthored three editions of the CCDA Official Cert Guide . About the Technical Reviewers Kevin Yudong Wu , CCIE No. 10697 (Routing & Switching and Security), is a senior network consultant

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    at British Telecom (BT). He has been engaged as a leading engineer in various network design projects, including LAN, WLAN, data center, and network security with BT’s customers. Before joining BT, Kevin worked as customer support engineer at Cisco High Touch Technical Support (HTTS), supporting both Cisco LAN switching and security products. He holds master’s degrees in both computer science (University of Texas at Arlington, 2003) and materials engineering (Beijing University of Aeronautics and Astronautics, 1995). James Hill , CCIE No. 29455, CISSP, is a highly respected security professional with a career spanning 25 years in the field of IT. Currently, he is the co-owner of H5 Strategic Alliances, LLC, an IT consulting firm, and serves as the chief technology officer. H5 is committed to providing an “intelligent IT” mindset while providing expert-level professional services. H5’s focuses includes cybersecurity, network access control, architectural design, implementation, and support. James has designed and implemented infrastructure and security solutions at several Fortune 500 companies within the United States. James has held the CISSP certification since 2004 and CCIE Security certification since 2011.

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    Dedications Anthony Bruno: This book is dedicated to my wife of 29 years, Yvonne Bruno, Ph.D., and to our daughters, Joanne and Dianne. Thanks for all of your support during the development of this book. And to my mom, Iris Bruno: Thank you for being a wonderful mother. Steve Jordan: This book is dedicated to my daughter, Blake, and my two sons, Lance and Miles, for always supporting me during the development of this book. I also want to dedicate this book to my mother, Frances Brennan, and my good friend David Carswell Jr. for supporting me and providing encouragement during the writing of this book.

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    Acknowledgments This book would not have been possible without the efforts of many dedicated people. I’d like to give special recognition to Ellie Bru, development editor, for providing her expert technical knowledge in editing the book. Thanks to Kitty Wilson, Brett Bartow and Cindy Teeters for your support. And thanks to my coauthor, Steve Jordan, for working with me again on developing this book. And a special thanks to the technical reviewers, Kevin Wu and James Hill; your technical reviews, comments, and attention to detail made this book accurate. —Anthony Bruno This book would not have been possible without all the great people who have assisted me. I would first like to thank Anthony Bruno for inviting me to assist him in this endeavor once more. Thanks to Brett Bartow, executive editor, for his guidance and support during the book’s development. Thanks again to Ellie Bru, development editor, for supporting my schedule delays and keeping me on track. Special thanks to the technical reviewers of this book,

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    James Hill and Kevin Wu, who provided wisdom and helped with keeping the book accurate. Finally, thanks to all the managers and marketing people at Cisco Press who make all these books possible. —Steve Jordan

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    Contents at a Glance Introduction Chapter 1. Internet Protocol Version 4 (IPv4) Design Chapter 2. Internet Protocol Version 6 (IPv6) Design Chapter 3. Routing Protocol Characteristics, EIGRP, and IS-IS Chapter 4. OSPF, BGP, and Route Manipulation Chapter 5. IP Multicast and Network Management Chapter 6. Enterprise LAN Design and Technologies Chapter 7. Advanced Enterprise Campus Design Chapter 8. WAN for the Enterprise Chapter 9. WAN Availability and QoS Chapter 10. SD-Access Design Chapter 11. SD-WAN Design Chapter 12. Automation

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    Chapter 13. Final Preparation Appendix A. OSI Model, TCP/IP Architecture, and Numeric Conversion Appendix B. Answers to the “Do I Know This Already?” Quiz Questions Q&A Questions Appendix C. CCNP Enterprise Design ENSLD 300-420 Official Cert Guide Exam Updates Appendix D. Memory Tables Appendix E. Memory Tables Answer Key Appendix F. Study Planner Glossary

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    Reader Services Other Features Register your copy at www.ciscopress.com/title/9780136575191 for convenient access to downloads, updates, and corrections as they become available. To start the registration process, go to www.ciscopress.com/register and log in or create an account. * Enter the product ISBN 9780136575191 and click Submit. When the process is complete, you will find any available bonus content under Registered Products. *Be sure to check the box saying that you would like to hear from us to receive exclusive discounts on future editions of this product.

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    Contents Introduction Goals and Methods Who Should Read This Book? Strategies for Exam Preparation The Companion Website for Online Content Review How This Book Is Organized Certification Exam Topics and This Book Chapter 1. Internet Protocol Version 4 (IPv4) Design “Do I Know This Already?” Quiz Foundation Topics IPv4 Header IPv4 Addressing IPv4 Address Subnets IPv4 Addressing Design Address Assignment and Name Resolution References and Recommended Readings Exam Preparation Tasks

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    Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 2. Internet Protocol Version 6 (IPv6) Design “Do I Know This Already?” Quiz Foundation Topics Introduction to IPv6 IPv6 Header IPv6 Address Representation IPv6 Address Scope Types and Address Allocations IPv6 Mechanisms IPv6 Routing Protocols IPv4-to-IPv6 Migration Strategies and Deployment Models References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A

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    Chapter 3. Routing Protocol Characteristics, EIGRP, and IS-IS “Do I Know This Already?” Quiz Foundation Topics Routing Protocol Characteristics Routing Protocol Metrics and Loop Prevention EIGRP IS-IS References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 4. OSPF, BGP, and Route Manipulation “Do I Know This Already?” Quiz Foundation Topics OSPFv2 OSPFv3 BGP Route Manipulation

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    References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 5. IP Multicast and Network Management “Do I Know This Already?” Quiz Foundation Topics IP Multicast Review Network Management Design References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 6. Enterprise LAN Design and Technologies “Do I Know This Already?” Quiz Foundation Topics

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    Hierarchical Network Models LAN Media Spanning Tree Protocol Design Considerations References and Recommended Reading Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 7. Advanced Enterprise Campus Design “Do I Know This Already?” Quiz Foundation Topics Campus LAN Design and Best Practices High Availability Network Services References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A

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    Chapter 8. WAN for the Enterprise “Do I Know This Already?” Quiz Foundation Topics WAN Overview WAN Transport Technologies Site-to-Site VPN Design References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 9. WAN Availability and QoS “Do I Know This Already?” Quiz Foundation Topics WAN Design Methodologies Design for High Availability Internet Connectivity Backup Connectivity QoS Strategies Designing End-to-End QoS Policies References and Recommended Readings

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    Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 10. SD-Access Design “Do I Know This Already?” Quiz Foundation Topics SD-Access Architecture SD-Access Fabric Design Considerations for Wired and Wireless Access References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 11. SD-WAN Design “Do I Know This Already?” Quiz Foundation Topics SD-WAN Architecture SD-WAN Design Considerations

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    References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 12. Automation “Do I Know This Already?” Quiz Foundation Topics Introduction to Network APIs and Protocols YANG, NETCONF, and RESTCONF Explored IETF, OpenConfig, and Cisco YANG Models Model-Driven Telemetry References and Recommended Readings Exam Preparation Tasks Review All Key Topics Complete Tables and Lists from Memory Define Key Terms Q&A Chapter 13. Final Preparation

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    Getting Ready Tools for Final Preparation Suggested Plan for Final Review/Study Summary Appendix A. OSI Model, TCP/IP Architecture, and Numeric Conversion Appendix B. Answers to the “Do I Know This Already?” Quiz Questions Q&A Questions “Do I Know This Already?” Answers Quiz Answers Appendix C. CCNP Enterprise Design ENSLD 300-420 Official Cert Guide Exam Updates Always Get the Latest at the Book’s Product Page Technical Content Appendix D. Memory Tables Appendix E. Memory Tables Answer Key Appendix F. Study Planner Glossary

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    Icons Used in This Book

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    Command Syntax Conventions The conventions used to present command syntax in this book are the same conventions used in the IOS Command Reference. The Command Reference describes these conventions as follows: • Boldface indicates commands and keywords that are entered literally as shown. In actual configuration examples and output (not general command syntax), boldface indicates commands that are manually input by the user (such as a show command). • Italic indicates arguments for which you supply actual values. • Vertical bars (|) separate alternative, mutually exclusive elements. • Square brackets ([ ]) indicate an optional element. • Braces ({ }) indicate a required choice. • Braces within brackets ([{ }]) indicate a required choice within an optional element.

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    Introduction Congratulations! If you are reading this Introduction, then you have probably decided to obtain a Cisco certification. Obtaining a Cisco certification will ensure that you have a solid understanding of common industry protocols along with Cisco’s device architecture and configuration. Cisco has a high network infrastructure market share of routers, switches, and firewalls, and a global footprint. Professional certifications have been an important part of the computing industry for many years and will continue to become more important. Many reasons exist for these certifications, but the most popularly cited reason is that they show the holder’s credibility. All other factors being equal, a certified employee/consultant/job candidate is considered more valuable than one who is not certified. Cisco provides three levels of certifications: Cisco Certified Network Associate (CCNA), Cisco Certified Network Professional (CCNP), and Cisco Certified Internetwork Expert (CCIE). Cisco made changes to all three certifications, effective February 2020. The following are the most notable of the many changes:

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    • The exams now include additional topics, such as programming. • The CCNA certification is no longer a prerequisite for obtaining the CCNP certification. • CCNA specializations are not being offered anymore. • The exams test a candidate’s ability to configure and troubleshoot network devices in addition to the candidate’s ability to answer multiple-choice questions. • The CCNP is obtained by taking and passing a Core exam and a Concentration exam. • The CCIE certification requires candidates to pass the Core written exam before the CCIE lab can be scheduled. CCNP Enterprise candidates need to take and pass the Implementing and Operating Cisco Enterprise Network Core Technologies ENCOR 350-401 examination. Then they need to take and pass one of the following Concentration exams to obtain their CCNP Enterprise certification: • 300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) • 300-415 ENSDWI: Implementing Cisco SD-

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    WAN Solutions (SDWAN300) • 300-420 ENSLD: Designing Cisco Enterprise Networks (ENSLD) • 300-425 ENWLSD: Designing Cisco Enterprise Wireless Networks (ENWLSD) • 300-430 ENWLSI: Implementing Cisco Enterprise Wireless Networks (ENWLSI) • 300-435 ENAUTO: Implementing Automation for Cisco Enterprise Solutions (ENAUI) This book helps you study for the Designing Cisco Enterprise Networks (ENSLD 300-420) exam. When you take the exam, you are allowed 90 minutes to complete about 60 questions. Testing is done at Pearson VUE testing centers. Be sure to visit www.cisco.com to find the latest information on CCNP Concentration requirements and to keep up to date on any new Concentration exams that are announced. GOALS AND METHODS The most important and somewhat obvious goal of this book is to help you pass the ENSLD 300-420 exam. In fact, if the primary objective of this book were different, then the book’s title would be misleading; however, the methods used in this book to help you pass the ENSLD

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