(2010) [.Cisco Press.] Deploying and Troubleshooting Cisco Wireless LAN Controllers.pdf

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Deploying and
Troubleshooting Cisco
Wireless LAN Controllers
Mark L. Gress, CCIE 25539
Lee Johnson
Cisco Press
800 East 96th Street
Indianapolis, IN 46240
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Deploying and Troubleshooting Cisco Wireless LAN Controllers
Deploying and Troubleshooting Cisco Wireless LAN
Controllers
Mark L. Gress, CCIE 25539 and Lee Johnson
Copyright© 2010 Cisco Systems, Inc.
Published by:
Cisco Press
800 East 96th Street
Indianapolis, IN 46240 USA
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means,
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tem, without written permission from the publisher, except for the inclusion of brief quotations in a review.
Printed in the United States of America
First Printing November 2009
Library of Congress Cataloging-in-Publication data is on file.
ISBN-13: 978-1-58705-814-1
ISBN-10: 1-58705-814-6
Warning and Disclaimer
This book is designed to provide information about the Cisco Unified Wireless Network (CUWN) solu-
tion pertaining to understanding and troubleshooting wireless LAN Controllers (WLC) and access points
(AP). The information contained in this book, in conjunction with real-world experience, also provides an
excellent self-study resource for the CCIE Wireless exam. Every effort has been made to make this book
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Deploying and Troubleshooting Cisco Wireless LAN Controllers
About the Authors
Mark L. Gress, CCIE 25539,
is an escalation engineer at the Cisco Systems Technical
Assistance Center (TAC) in Research Triangle Park, North Carolina, where he has worked
since 2005. He has been troubleshooting complex wireless networks since the birth of
the Cisco Wireless LAN Controller (WLC) as a TAC engineer, a technical lead for the
Enterprise Wireless team, and now as an escalation engineer supporting the complete
Cisco line of wireless products. Mark has diagnosed problems in some of the largest
Cisco wireless deployments and has provided training for TAC teams around the world.
He has also contributed to numerous design guides, application notes, and white papers.
As one of the highest contributors of identifying and assisting in defect resolution, his
work has led to increases in overall product quality and stability. Mark graduated summa
cum laude with a bachelors of science in both computer information systems and busi-
ness management from North Carolina Wesleyan College. For more than ten years, Mark
has been professionally involved in the networking industry.
Lee Johnson
is currently a wireless specialist on the RTP Wireless TAC team at Cisco. He
has been troubleshooting wireless networks, including both autonomous and controller-
based infrastructures, since 2006. Lee troubleshoots complex wireless issues in Cisco
customer networks around the world. He has been dispatched to customer sites to
address critical accounts and represented Cisco at Networkers. He also provides training
and documentation for fellow Cisco engineers in both wireless and nonwireless TAC
groups. Lee works closely with the wireless development group at Cisco to improve
product quality and the customer experience with the WLC. He holds a bachelor of
science degree in biology from the University of North Carolina at Chapel Hill.
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About the Contributing Author
Javier Contreras Albesa,
CCIE Security, is a member of the escalation team for the
Wireless Business Unit, at Cisco Systems in Spain, where he has worked since 2005. Since
the introduction of the Wireless LAN Controllers, he has been an escalation engineer on
the TAC in Belgium and now interfaces between post-sales support and development
responsible for supporting the European region. Javier has been involved on most support
cases for the region and several priority cases worldwide. He has been a significant con-
tributor to quality improvement on different wireless products. He has published several
whitepapers and application notes and is the main developer on the WLC Config
Analyzer, a tool used to simplify the support on WLC deployments. Javier graduated in
computer information systems in Venezuela. For more than 12 years, Javier has been
involved in networking, security consultancy, and the wireless industry.
About the Technical Reviewers
Dmitry Khalyavin
is the lead engineer in Cisco’s Wireless Network Business Unit escala-
tion team. He has six years of experience working with design, implementation, manage-
ment, and troubleshooting of the complete line of Cisco’s wireless product offerings. He
holds a bachelor’s degree in computer science from Polytechnic Institute of New York
University.
Fabian Riesen
is Technical Leader at Cisco Systems’ TAC in Switzerland. He joined
Cisco in 1999 as a project engineer. He owns a Swiss-Engineer degree from the
University of Applied Sciences Winterthur/Zurich* with specialization in Software
Engineering and Transmission Technologies. He is CCIE ISP-Dial and CCIE Wireless
No. 6268.

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