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Trademark Acknowledgments
All terms mentioned in this book that are known to be trademarks or service marks have been
appropriately capitalized. Macmillan Technical Publishing or Cisco Systems, Inc. cannot attest to the
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uracy of this information. Use of a term in this book should not be regarded as affecting the
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About the Reviewers
Jennifer DeHaven Carroll is a principal consultant for International Network Services. She is CCIE
number 1402. Jennifer has planned, designed and implemented many IP networks over the past 10
years, utilizing RIP version 2, IGRP, E
-
IGRP, OSPF and BGP. She has also developed and taught
theory and Cisco implementation classes on all IP routing protocols.
Michael Tibodeau is a Systems Engineer for Cisco Systems. Over the past two years, Michael has
specialized in security technologies for both his own customers and Networkers audiences. He also
focuses on the Electronic Comm erce and Quality of Service aren
as. Michael holds a Bachelor's
degree in Systems Engineering from the University of Virginia and holds a Master's degree in
Systems Engineering and Management, concentrating on telecommunications.
I ntroduction
Routing is an essential element of all but the
smallest data communications networks. At one level,
routing and the configuration of routers are quite simple. But as internetworks grow in size and
complexity, routing issues can become at once both large and subtle. Perversely, perhaps, I am
grateful f
or the difficult problems large
-
scale routing can present
—
as a network systems consultant,
these problems are my bread and butter. Without them, the phrase "You want fries with that?" could
be an unfortunate part of my daily vocabulary.
Cisco Certified Int
ernetwork Experts are widely recognized for their ability to design, troubleshoot,
and manage large internetworks. This recognition comes from the fact that you cannot become a
CCIE by attending a few classes and then regurgitating some memorized facts ont
o a written test. A
CCIE has proven his or her expertise in an intense, famously difficult hands
-
on lab exam.
Objectives
This book is the first in a series designed to aid you in becoming a Cisco Certified Internetwork
Expert and the first of two volumes t
hat focuses on TCP/IP routing issues. Early in the project, Kim
Lew, Cisco Systems program manager, said, "Our objective is to make CCIEs, not to make people
who can pass the CCIE lab." I entirely agree with that statement and have used it as a guiding
pri
nciple throughout the writing of this book. Although the book includes many case studies and
exercises to help you prepare for the CCIE lab, my primary objective is to increase your
understanding of IP routing
—
both on a generic level and it is implemented
on Cisco routers.
Audience
The audience for this book is any network designer, administrator, or engineer who needs a full
understanding of the interior routing protocols of TCP/IP. Although the practical aspects of the book
focus on Cisco's IOS, the infor
mation is applicable to any routing platform.
sgm2772014-09-02原理很重要啊！
