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Thomas D. Nadeau and Ken Gray
SDN: Software Defined Networks
SDN: Software Defined Networks
by Thomas D. Nadeau and Ken Gray
Copyright © 2013 Thomas D. Nadeau, Ken Gray. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are
also available for most titles (http://my.safaribooksonline.com). For more information, contact our corporate/
institutional sales department: 800-998-9938 or corporate@oreilly.com.
Editors: Mike Loukides and Meghan Blanchette
Production Editor: Kristen Borg
Copyeditor: Jasmine Kwityn
Proofreader: Amanda Kersey
Indexer: Judith McConville
Cover Designer: Karen Montgomery
Interior Designer: David Futato
Illustrator: Rebecca Demarest and Kara Ebrahim
August 2013:
First Edition
Revision History for the First Edition:
2013-08-07: First release
See http://oreilly.com/catalog/errata.csp?isbn=9781449342302 for release details.
Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly
Media, Inc. SDN: Software Defined Networks, the image of a goosander duck, and related trade dress are
trademarks of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as
trademarks. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a trade‐
mark claim, the designations have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the publisher and authors assume
no responsibility for errors or omissions, or for damages resulting from the use of the information contained
herein.
ISBN: 978-1-449-34230-2
[LSI]
Table of Contents
Foreword by David Meyer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Foreword by David Ward. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
1.
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.
Centralized and Distributed Control and Data Planes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Introduction 9
Evolution versus Revolution 10
What Do They Do? 11
The Control Plane 11
Data Plane 16
Moving Information Between Planes 18
Why Can Separation Be Important? 20
Distributed Control Planes 28
IP and MPLS 29
Creating the IP Underlay 30
Convergence Time 32
Load Balancing 33
High Availability 34
Creating the MPLS Overlay 34
Replication 37
Centralized Control Planes 37
Logical Versus Literal 38
ATM/LANE 39
Route Servers 42
Conclusions 44
3. OpenFlow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
iii
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