Bookham - Versatile Routing and Services with BGP

Versatile Routing and Services with BGP: Understanding and Implementing BGP in SR-OS

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Copyright 2014 by Alcatel-Lucent

Published by John Wiley & Sons, Inc., Indianapolis, Indiana

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ISBN: 978-1-118-87528-5

ISBN: 978-1-118-87521-6 (ebk)

ISBN: 978-1-118-87562-9 (ebk)

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To my wife, whose patience knows no bounds.

Credits

About the Author

Colin Bookham is a consulting engineer at Alcatel-Lucent with more than 20 years of experience in the telecommunications industry. He has designed or helped to design, and supported, many large IP networks across a broad range of market segments in EMEA.

Prior to working at Alcatel-Lucent, Colin spent a number of years working in IP design and architecture for a UK operator. Before that, he spent the early years of his career studying communications in the Royal Navy. Colin lives in Guildford, UK, and can be reached at colin . bookham@alcatel-lucent . com .

Acknowledgments

Thanks to Adam Simpson, Ian Cowburn, Jorge Rabadan, and Gilles Geerts for their valuable input in validating the content for technical correctness and relevance. Special thanks to Adam for his endless support and for never tiring of my questions.

Thanks to all those people who helped in some way in the technical reviews and helped to fix errors in the manuscript: Walter de Smedt, Guiu Fabregas, Bert Todts, Patrick Colman, Rafa Portillo, Patrick Lynchehaun, Ian Dodds, Rob Shakir, Ilya Varlashkin, and Bruno Decraene.

I also want to express my gratitude to Karyn Lennon and Stephanie Chasse who guided me along this publishing initiative.

Finally, thanks to members of the Alcatel-Lucent senior management teamWim Henderickx, Rudy Hoebeke and Barry Denrochefor supporting me in the writing of this book.

Foreword

Over the past decade we have witnessed an exciting evolution of Internet Protocol (IP) networks from best-effort networks providing basic Internet access services to true multi-service networks providing fixed residential and mobile broadband services, business Virtual Private Network (VPN) services, cloud services, and carrying more and more mission-critical applications.

IP networks have gradually replaced most of the legacy networks of the past, resulting in more efficient and converged network infrastructures. This is not only the case for service provider and enterprise networks; the same evolution applies to strategic industry networks such as defense, energy, health care, transportation, and government networks.

When it comes to IP networking, there is arguably no protocol more important or successful than the Border Gateway Protocol (BGP)it is the protocol that has tied the Internet together over the course of its impressive development in the past 20-plus years.

As the scope of IP networking has evolved over time, so has BGP. BGP has been extended to enable new services such as IP VPN (BGP/MPLS IPv4 VPN and 6VPE) and Layer 2 VPN (Virtual Private LAN, Virtual Leased Line, and BGP/MPLS based Ethernet VPN) services, to support network optimizations such as those provided by large-scale MPLS network designsnow commonly known as seamless MPLSto simplify operations, to enhance network security and to improve network stability, resiliency and reconvergence performance. There is no other protocol that carries such a large and varied set of networking information and that is so central to many networking functions and services, both internally and between Autonomous Systems (AS).