Acknowledgments

To my managers:

This book wouldn't be possible if I didn't have the continuous and unconditional support of my managers: Felicia Brych, who devoted her time for months to make this book happen, and Chuck Trent and Henry White, who encouraged me and created an unmatchable atmosphere of trust and encouragement to ensure the success of this project. Special appreciation goes to my Sprint E-Solutions manager, Debra Wieland, and to Chris Starsiak for believing in me and for the support.

To the Cisco Press team:

Many thanks to Brett Bartow for giving me the chance to write for Cisco Press, and Drew Cupp for his assistance, persistence, and remarkable language skills during the creation of this book. I would also like to thank Sheri Cain for her excellent work in managing this book through the production process. Finally, I want to thank Jill Batistick, Ginny Bess Munroe, Christopher Cleveland, Cris Mattison, Doug Ingersoll, and Marianne Huff for providing me with assistance, formatting, and editing the content, improving the language, and for technical corrections.

To the technical editors of this book:

My special appreciation goes to Brian Feeny (CCIE No. 8036), Brian Morgan (CCIE No. 4865), Bill Wagner (CCSI), and especially to Jonathan Zung (CCDP, CCNP) for their valuable comments, devotion and time, and helping me to make this book better.

To my colleagues who helped write and edit:

Many thanks to my colleagues from the Remote Access team at Cisco, who are some of the most talented engineers I've ever worked with in my carrier. All of them are at different stages of achieving the highest Cisco certifications, but all together, they make what usually is referred to as "The Team" and as such, everyone has their own technical strengths, preferences, and proven techniques. Some of them have written part of this book, some of them have reviewed the content, and some of them did both. Overall, sharing this collective experience, in my understanding, adds value to this book and serves the readers' needs best. As a result, this book includes only the proven best practices type of information and proven troubleshooting scenarios from more than tens of thousands of cases in the recent years . I would like to thank the following team members and note their contributions to this book:

Felicia Brych (BComm, MPM) is from Canada and holds degrees from Memorial University of Newfoundland and the University of Quebec. Felicia managed Cisco's Internal Remote Access Services department from December 1999 to August 2001, with successes that included the global deployment of VPN and significant cost reduction for all remote access solutions. Prior to working for Cisco, she managed Remote Access and Technology Services for Revenue Canada. Felicia currently leads IT initiatives involving collaboration infrastructure and IP telephony for the home. In her spare time, Felicia enjoys gardening and spending time with her husband, three stepchildren, and two Labrador Retrievers.

Felicia is the principal author of the foreword and the "Management Considerations" section for Chapter 1 of this book. Felicia edited the entire content of this book for style and language.

Chuck Cardamon is an IT analyst in Infrastructure, Carrier Services & Provisioning. He has an AOS degree in Culinary Arts and is a veteran, retiring as a U.S. Navy SEAL after 20 years of service. He is a proponent of organ donation and was a live liver donor to save the life of a friend. In his spare time, he rides motorcycles and fly fishes. He has been married for 26 years and has 4 adult children.

Chuck is the principal author of the "Provisioning of Enterprise Remote Access Services" section for Chapter 1.

Jered T. Huegen is a network engineer supporting remote access services for Cisco Systems. He has been working towards his CCIE in Communications and Services and passed the written exam. Jered has helped to facilitate the growth of the remote access infrastructure from a few hundred clients to accommodate 40,000 clients . He has a college background in math and accounting. In his spare time, Jered enjoys being a pit crewmember and making split-second setup decisions for a dirt-track race team. He was married in September 2002.

Jered is the principal author of the following chapters:

• Chapter 5, "Dial Technology Background"

• Chapter 6, "Dial Design and Configuration Solutions"

• Chapter 7, "Dial Troubleshooting"

• Chapter 8, "Dial Troubleshooting Scenarios"

Omid Kaabipour (CCNA) has a B.S. in Business Administration (MIS) from San Jose State University. As a lead engineer for Frame Relay with the Remote Access group, he participated in design, support, and troubleshooting Frame Relay, ISDN, VPN, and Dial. Recently, Omid has been working with the Cisco Northeast Transport Group on transport technologies across a wide range of Cisco platforms, including WAN, LAN, MAN and Frame Relay troubleshooting, design, and maintenance. In his spare time, he thrives on listening to classical music and enjoys going to movies.

Omid is the principal author of the Frame Relay host migration scenario in Chapter 18 of this book and helped with the technical review of this book at its final phase.

David Iacobacci is a network engineer in the Cisco IT Remote Access Services group and has been the technical lead of the team for about two years. He has been working toward his CCIE in Security. A native New Yorker, he lived in Japan for over nine years, working for Nihon Cisco Systems and Procter & Gamble Far East, Inc., after obtaining an MBA from the International University of Japan. He also holds a BS in Mechanical Engineering from Rutgers University and has worked for Citigoup, FMC Corporation, and the U.S. Navy. When not working, David enjoys his free time with his wife and daughter .

David is the principal author of the following chapters:

• Chapter 20, "Remote Access VPN Design and Configuration Solutions"

• Chapter 21, "Remote Access VPN Troubleshooting"

Zack Schaefer (CCNP, CCDP) is currently working on his CCIE. He has spent a majority of his post college career working for Cisco in its Remote Access department. Throughout his entire career at Cisco, he has helped support Cisco's entire VPN infrastructure, solving thousands of VPN problems yearly. He is currently a network engineer supporting WAN, LAN, MAN, and remote access for Latin America and the Central and Southeast United States. Additionally, he routinely performs VPN troubleshooting training for fellow Cisco employees .

Zack is the principal author of Chapter 22, "Remote Access VPN Troubleshooting Scenarios."

James Michael Thompson (CCNP, CCDA) made a move from the music industry to the networking industry in the late 1980s. Before working with the Cisco Remote Access team, Jim worked as a WAN engineer and as a CNE at a network integration company. Jim passed the CCIE qualifying exam and is scheduled to take the lab exam in the near future. He lives in Sonora, California, with hobbies such as photography, hiking , mountain biking, kayaking, and still enjoys making music.

Jim helped with the technical review of this book at its final phase.

Lainie van Doornewaard has been with Cisco Systems, Inc. for approx. five and a half years after leaving a career in law enforcement. She worked as the team lead for support for the engineering community, then joined the Network Operations Team, which is responsible for Cisco's corporate LAN, WAN, and MAN infrastructure. She transferred to the Remote Access team in July of 2000 and has been the backup engineer for VPN and lead engineer for xDSL for almost two years. She is currently a team lead for the Remote Access Engineering team in San Jose.

Lainie helped with the technical review of this book at its final phase.

I'd like to acknowledge the contributions of some of the founders of the Remote Access environment at Cisco: Yinpo Wong, BS, BA, MBA, currently Engineering Manager at Cisco Systems, Inc., John B Cornell III, currently Member of Technical Staff (IT) at Cisco Systems, Inc., and Craig Huegen, CCIE #2100, who is currently Chief Network Architect for Cisco Systems.

Finally, this book enjoyed the encouragement of many people, and I'd like to thank Dave Holloway, Kristine Smith, Lanny Ripple, Julie Martinez, Jeff Galisky, Terrance Blackman, Lilyan Gonzalez, Albert Soeherman, Diana Perez, Sidney Thompson, Damian Morris, Al Roethlisberger, Jawahar Sivasankaran (CCIE 8870), Doug Gober, Kathleen O'Looney, and many others.