Asadullah Salman Ahmed Adeel - Deploying ipv6 in broadband access networks

Copyright 2009 by John Wiley & Sons, Inc. All rights reserved.

Published by John Wiley & Sons, Inc., Hoboken, New Jersey.
Published simultaneously in Canada.

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Library of Congress Cataloging-in-Publication Data.

Ahmed, Adeel.
Deploying IPv6 in broadband access networks/
Adeel Ahmed and Salman Asadullah

Includes bibliographic references and index

ISBN 978-0-470-19338-9

I dedicate this book to my parents for everything they have done for me; I could never repay them. To my wife: for her love, support, and patience throughout the writing of this book. To my lovely children: Asad, Aashir, and Zeerak, you are my inspiration and my pride and joy. I love you all very much.

I would also like to dedicate the book to all the people suffering in this world and to those people who work endlessly to help others and to make the world a better place.

Adeel Ahmed

I dedicate this book to all who are suffering and going through tribulations, and to those who are working to relieve those in pain and suffering. I also dedicate this work to my loving parents, brothers, and two lights of my life: Bahira and Fatimah!

Salman Asadullah

FOREWORD

The Internet is becoming a utility with an estimated 1.5 billion users, commonly referred to as netizens, around the world. This large user base is surpassed only by the 3.5 billion mobile (cell) phone users on the planet. Approximately 10% of cell phones in use today are smart phones, which also provide Internet services. The Internet backbone is quite robust; however, the last mile of the access layer is made up of a fragmented delivery system ranging from very low speed to high-speed (1 Gbps) connections. To put things in perspective, a 1-Gbps connection will allow downloading of a James Bond movie in about 20 seconds. High-speed download allows better use of Internet resources than does live streaming, which is resource intensive due to time constraints on packet delivery and reordering.

Broadband provides the Internet with an opportunity to become a robust utility similar to the TV networks. It is interesting to note that TV networks were designed with enough capacity to match viewer expectations for quality of experience. The next stage in the evolution of broadband access is to move from asymmetric to symmetric provisioning, thus allowing consumers to download and upload at the same speed. IPv6 provides a large address capacity and will be ideal for a commodity addressing scheme that will enable two-way always-on, Internet services. This scenario will signify the most important shift in adoption of the Internet, by empowering users to become full-time residents instead of simply sporadic in-and-out consumers. The evolving Internet offers a bright future by transforming casual users in TV broadcasters, reporters, and remote entertainers, and by creating new jobs and providing unprecedented opportunities that traditionally required expensive support infrastructure. The deployment of IPv6 has become an issue of strategic importance for many national economies. Telecom operators and Internet service providers (ISPs) are key players in facilitating the deployment of IPv6 on broadband access networks amid the obvious complexities of coexisting with or replacing widely deployed IPv4 services. Evidently, telecom operators and ISPs have to take steps to ensure a workable transition strategy that involves transparent interoperability and integration of mature and advanced applications over both IPv4 and IPv6, this strategy will enable a combination of services that will allow service providers to explore and exploit richer services offered by IPv6 during a potentially long transition from IPv4. This will also lead to new business models that will generate return on investment without waiting for the ubiquitous deployment of IPv6.

The IPv4 address space is virtually depleted, with just over 14% capacity remaining, and is expected to run out by the end of 2010. It is therefore anticipated that the use of IPv6 will gain momentum and the end user will drive differentiated services, achieving returns not only in investments but also in service innovations and flexible communication solutions. Solutions for integrating and deploying both IPv4 and IPv6 services are mature and available to service providers.

The authors of this book have the necessary technical expertise and experience to identify the challenges and to propose recommendations and solutions of great value to a world made of heterogeneous and widely un-interoperable networks designed using private addressing schemes that inhibit end-to-end applications and services. Their extensive involvement in standardization bodies such as the IETF and knowledge spread at the customer level in the design and deployment of IPv6 networks are of paramount value to readers, who can gain first-class knowledge to empower them to tackle the transition to IPv6 with greater confidence.

Welcome to the new two-way IPv6-based broadband access to the Internet!

LATIF LADID
President, IPv6 Forum

PREFACE

This book is meant to be used as a guide by network engineers and architects while deploying IPv6 in their broadband networks. Service providers worldwide are looking for ways to expand their networks and to meet the scalability requirements of the growing number of always-on devices connected to the Internet. IPv6 is currently the only solution available to meet these challenges and to enable service providers to scale their networks and provide new services to customers.