Cisco.Press.Troubleshooting.Remote.Access.Networks.pdf

5259.book Page i Thursday, October 10, 2002 5:39 PM

Troubleshooting Remote

Access Networks

Plamen Nedeltchev, Ph.D.

201 W 103rd Street

Indianapolis, IN 46290 USA

5259.book Page ii Thursday, October 10, 2002 5:39 PM

Troubleshooting Remote Access Networks

Plamen Nedeltchev

Published by:

Cisco Press

201 West 103rd Street

Indianapolis, IN 46290 USA

electronic or mechanical, including photocopying, recording, or by any information storage and retrieval

system, without written permission from the publisher, except for the inclusion of brief quotations in a

review.

Printed in the United States of America 1 2 3 4 5 6 7 8 9 0

First Printing November 2002

Library of Congress Cataloging-in-Publication Number: 2001096586

ISBN: 1-58705-076-5

Warning and Disclaimer

This book is designed to provide information about troubleshooting remote access networks. 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 author, 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.

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All terms mentioned in this book that are known to be trademarks or service marks have been appropriately

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We greatly appreciate your assistance.

5259.book Page iii Thursday, October 10, 2002 5:39 PM

iii

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relationship between Cisco and any other company. (0010R)

Packet

CCNP, CCSI, CD-PAC,

5259.book Page iv Thursday, October 10, 2002 5:39 PM

About the Author

was born in February 1954 in Silistra, Bulgaria. He graduated from high

school as valedictorian in 1972. In 1980, he received an M.S. (Summa Cum Laude) from Saint

Petersburg State Electro-Technical University. In 1989, he received his Ph.D. from the

Bulgarian Academy of Science, Soﬁa, Bulgaria.

Magazine. He

speaks ﬁve languages and has one technical patent. The scope of his technical expertise and

interests includes bridging, switching, routing, capacity planning, compression, multicast,

QoS, content networking, SOHO, ROBO, design/modeling/simulation, ISDN, Frame Relay,

VPN, xDSL, cable modem, dial, wireless, and troubleshooting. In his spare time, he enjoys

political history, philosophy, literature, sports, and music.

Packet

About the Technical Reviewers

(CCIE No. 8036) is the senior network engineer for ShreveNet Inc., an Internet

service provider, where he has been working for the last six years. He is also a Partner in Netjam

LLC, which specializes in sales and support of Cisco network equipment. Brian has more than

ten years experience in the networking industry.

Brian Morgan

(CCIE No. 4865) is a Cisco Press author (

CCNP Remote Access Exam

) and a frequent contributor in both editing and content. He has been in the

networking industry for over ten years as a consultant in large internetworking environments. He

has also spent much of the last ﬁve years as an instructor for Cisco Learning Partners teaching

ICND, BSCN/I, BCRAN, CATM, CVOICE, CCIE/CCNP bootcamps, and other courses.

works as a Cisco Certiﬁed System Instructor for Skyline Computer Corp.

He has 23 years of computer programming and data communication experience. He has worked

for corporations and companies such as Independent Computer Consultants, Numerax,

McGraw-Hill/Numerax, and Standard and Poors. He has teaching experience with the Chubb

Institute, Protocol Interface Inc., Geotrain, Mentor Technologies, and he is currently teaching

at Skyline Computers Corp. William also holds a degree in Computer Science, is a CNE, and

currently holds his CCNA and CCNP from Cisco.

(CCNP, CCDP, working towards CCIE) has been at Cisco for nearly ﬁve years.

He started at Cisco as a UNIX systems administrator, but for the last four years at Cisco, he has

been working as a network engineer supporting Cisco’s internal remote access environment. He

graduated from California Polytechnic State University at San Luis Obispo with a B.S. in MIS

and a minor in Computer Science in 1997.

In addition to being one of the book’s technical reviewers who helped me with all phases to

improve the content, Jonathan is the principal author of the design and troubleshooting content

of Multi-Chassis Multilink Point-to-Point Protocol (MMP) in Chapter 10, “ISDN Design

Solutions” and Chapter 12, “ISDN BRI Troubleshooting” of this book.

Plamen Nedeltchev

Plamen worked as the chief information ofﬁcer of VMT (a division of the Ministry of

Transport of Bulgaria) in his country of origin. He joined Sprint E-Solutions in 1999 as a

senior network architect. The same year, he joined Cisco’s Remote Access team as a technical

consultant. During his career, he has published more than 40 publications in English,

Russian, and Bulgarian, including four recent articles in the Cisco

Brian Feeny

Certiﬁcation Guide

William R Wagner

Jonathan Zung

5259.book Page v Thursday, October 10, 2002 5:39 PM

Dedication

I dedicate this book to one of the most amazing people I have ever met, my wife Tatiana, for

her sincere moral support and help through all these years.

I dedicate this book to my kids, Nickolay and Irina, who make me a very proud father.

—Plamen

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