View Larger Image	Plamen Nedeltchev Cisco Press, Hardcover, Published November 2002, 864 pages, ISBN 1587050765
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• Gain a solid grasp of enterprise telecommunications technology fundamentals, including service options and clocking, line coding, and framing in carrier systems
• Understand how network traffic is handled by carriers and service providers
• Examine a layer-by-layer, systematic approach to troubleshooting issues
• Design, configure, and troubleshoot T1 and PRI circuits, text and PPP dial-in and dial-out services, and Cisco AS5000 Access Servers
• Design, configure, and troubleshoot ISDN BRI at the physical, data link, and network levels, as well as PPP, MMP, and telephone interfaces
• Design, configure, and troubleshoot Frame Relay UNI and NNI interfaces, with a focus on new installs, wrong DLCI, LMI settings, performance and multicast issues, and re-hosting of Frame Relay service<
• Design, configure, and troubleshoot PTPP, L2TP, and IPSec VPNs, examining specific VPN clients, Internet technology, and LAN issues
• Resolve common availability issues for all major remote access technologies through real-world scenarios for dial, ISDN, Frame Relay, and VPNs

The ranks of telecommuters, remote employees, and mobile users are growing every day and their communications needs are expanding just as rapidly. Advancements in remote access technologies allow users to become less dependent on the office and to increase productivity without sacrificing the convenience of direct access to the corporate network. Convenient, secure, and reliable connections are crucial to corporate reliance on remote access. Customers, employees, and partners should connect seamlessly, as if they were in company headquarters. They also must count on the ability to log in and to remain connected at an expected level of performance. Understanding how to deploy remote access services is the first step to realizing the benefits that these services offer but inconsistent performance or denial of service threaten productivity gains. It is critical that these services not only be available but also perform as promised.

Troubleshooting Remote Access Networks helps you understand underlying technologies and gain insight into the challenges, issues, and best practices for supporting remote access networks. This book focuses on the enterprise portion of a remote access network and includes service provider troubleshooting and design information that helps both enterprise and service provider network engineers understand the larger picture of remote access networks. This book opens with a section covering fundamental concepts. Design issues, provisioning, DSL and cable connectivity options, central office operations, authentication techniques, and troubleshooting tools are all addressed in this part of the book, forming the foundation upon which later sections are built. Each of the subsequent four parts examines a key remote access technology, including dial, ISDN, Frame Relay, and VPNs. Each part is a self-contained tutorial, providing foundation review, design and configuration overviews, and troubleshooting techniques. Each part concludes with a series of real-world support scenarios that represent proven best practices for remote access network management, drawn from tens of thousands of cases handled by the Cisco Remote Access team.

Whether you are looking for a design, configuration, and support reference guide, or need a preparation tool to help you prepare for the CCIE exam, Troubleshooting Remote Access Networks provides you with expert-level solutions to help guarantee the availability of remote access services.

Table of Contents

Foreword.

Introduction.

I. REMOTE ACCESS FUNDAMENTALS.

1. Remote Access Overview.

Management Considerations. Defining the Remote Access User Population. Remote Access Service Options. VPN Service Vehicles. Provisioning of Enterprise Remote Access Services.

2. Telecommunication Basics.

Shannons Capacity Theorem. Modulation and Line-Coding Techniques in Wired Networks. Modulation and Line-Coding Techniques in Wireless LANs. Modulation and Line-Coding Techniques in Hybrid Networks. Clocking, Line Coding, and Framing in Carrier Systems. End Notes.

3. The Cloud.

Carriers, Service Providers, and How Traffic Is Carried. FDM. Digitalization of the Signal and Pulse Code Modulation. TDM. T-Carriers. SONET, Synchronous Transport Signal, and Synchronous Digital Hierarchy. Carriers Facilities and Switching Systems. ISPs and ASPs. Data Centers and Internet Hosting Services. The Future of Service Providers. End Note.

4. Troubleshooting Approaches, Models, and Tools.

Interconnection Models. Troubleshooting Models and the Baseline. Common and Cisco-Specific Tools. End Notes.

II. DIAL.

5. Dial Technology Background.

Overview of Modems. Telco Issues. Authentication Options. PPP. End Notes.

6. Dial Design and Configuration Solutions.

Dial Design Solutions. Dial Configuration Solutions.

7. Dial Troubleshooting.

Troubleshooting NAS WAN Links. Troubleshooting Dial-In Service. Troubleshooting Dial-Out Service. AS5x00 Specific Commands and Debugs.

8. Dial Troubleshooting Scenarios.

Scenario 1: Authentication Time Outs—Part I. Scenario 2: Authentication Time Outs—Part II. Scenario 3: Frequent Retrains and Disconnects. Scenario 4: Dirty Phone Line. Scenario 5: Bad Modem. Frequently Asked Questions and Answers.

III. ISDN.

9. ISDN Technology Background.

ISDN Standards. ISDN Channels. ISDN Planes: ISDN Layer Architecture. ISDN Switch Types.

10. ISDN Design Solutions.

Enterprise and ISP Designs. IP Pool Design. NAT and PAT. Per-User (Per Function) Configuration. MLP. MMP.

11. Cisco ISDN Configuration Solutions.

Cisco ISDN Cost-Effective Solutions. ISDN Security. Configuring the POTS (Telephone) Interfaces.

12. ISDN BRI Troubleshooting.

Troubleshooting the Physical Layer. Troubleshooting the Data Link Layer. Troubleshooting the Network Layer. Troubleshooting PPP. Troubleshooting Telephone Interfaces. End Notes.

13. Troubleshooting Scenarios for ISDN BRI.

Recommendations for Practical Troubleshooting of ISDN Remote Services. Scenario 1: New Install Problems. Scenario 2: Dial-Out Problems. Scenario 3: ISDN Performance Problems. Scenario 4: End-to-End Communication Problems. Scenario 5: Windows 2000 DDR Issue.

IV. FRAME RELAY.

14. Frame Relay Technology Background.

Frame Relay Standards. Frame Relay Service Architecture. Frame Relay Protocols. End Notes.

15. Frame Relay Design Solutions.

Design Parameters. Frame Relay Topologies and Congestion Control. Frame Relay and Upper-Layer Protocols. LMI. Address Resolution: ARP, Reverse ARP, and Inverse ARP. End Notes.

16. Basic and Advanced Frame Relay Configurations.

Basic Frame Relay Configurations. Advanced Frame Relay Configurations.

17. Frame Relay Troubleshooting.

Beginning the Frame Relay Troubleshooting Process. Physical Layer Troubleshooting. Data Link Layer Troubleshooting. Performance Problems. End Notes.

18. Frame Relay Troubleshooting Scenarios.

Scenario 1: New Install Issues. Scenario 2: Mismatched DLCI Settings. Scenario 3: Performance Issues from Flapping Lines and Traffic Shaping Issues. Scenario 4: IP Multicast Issues in Frame Relay. Scenario 5: Frame Relay Host Migration.

V. VPN.

19. VPN Technology Background.

Service Provider, Dedicated, and Access VPNs. Enterprise VPNs Overview. Enterprise VPN Categories. Network Layer (Layer 3) VPNs. End Notes.

20. Remote Access VPN Design and Configuration Solutions.

Remote Access VPN Design Solutions. VPN Configuration Considerations. End Notes.

21. Remote Access VPN Troubleshooting.

Troubleshooting Cisco Remote Access VPN Clients. Internet Technologies and Remote Access VPNs. LAN and General Networking Issues Affecting Remote Access VPNs. End Notes.

22. Remote Access VPN Troubleshooting Scenarios.

Warming Up with Preliminary Troubleshooting Steps. Scenario 1: Cannot Authenticate. Scenario 2: Can Authenticate but Problems Passing Data. Scenario 3: PPPoE Software/Hardware Problems. Scenario 4: 3002 Connection Problems. Scenario 5: Extranet Issues. Summary.

Appendix A. Answers to Review Questions.

Index.

About the Author

Plamen Nedeltchev, Ph.D., is a technical solutions consultant on the Cisco Remote Access team at Cisco Systems. His responsibilities include design, configuration, troubleshooting, and engineering of remote access for the existing remote access infrastructure at Cisco. Plamen has more than 20 years experience in research, design, and development of LANs/WANs. He has extensive experience with all the major remote access technologies, including ISDN, Frame Relay, DSL, dial, wireless, and VPNs. Plamen has written more than 40 publications on these and other subjects

May 8, 2005     Brion S. Washington from So Cal
WOW!! Awesome Book, A must have
WOW!!! If this book isn't in your library, then your library is not complete. This book is a must have for the serious network professionals. Being in the CCIE Professional Development Series should tell you all you need to know about this AWESOME book. Do you want to know about ISDN? Frame Relay? Dial Services? VPN's? How Remote Access troubleshooting? Then look no further The first part of the book gives the reader foundational information on telecommunications and the various technologies associated with it. Then you learn about the options that can be deployed for remote access. The options section is good, and it describes the technologies along with the limitations and benefits for each of them. This will help you to make an informed decision on what you should deploy. You are also presented a handy section on management considerations for remote access. Its always nice to know what management might be thinking. The telecommunication chapter is very well done. After reading this chapter your knowledge of this subject will be substantial. Next you get into the cloud chapter as the author calls it. This chapter describes the components that you would find in the network cloud. The pages in this chapter are good and provide the reader with a wealth of information. This is a very well prepared section that helps the user build a solid foundation. Trust me youll have to know and use this material in the real world regardless of whether you are on a data, voice or converged network. The components and service provider sections are good for helping complete the readers knowledge and understanding of a cloud. The troubleshooting chapter is GOLDEN. You are given general steps and advice to help resolve problems in any type of environment not just remote networks. You are then taken on a review of the DoD and OSI models. They even through in a cool little protocol diagram that maps different protocols all the way from layer 7 to layer 1. I could ramble on and on about this chapter suffice it to say this is arguably the BEST TROUBLESHOOTING SECTION I have ever read!!! Buy the book and checkout this chapter. Parts II - V of the book gets into the main technologies that can be used for remote access. I really liked the format the author used for these parts of this book. He starts by providing an overview of the technology. Once you have a solid foundation he then takes you into design solutions. After your introduction you are shown practical application of it. Next you are taught how to troubleshoot this specific technology. The next phase that is used to hammer home everything you just read of the last few chapters is a chapter on troubleshooting scenarios. You are walked through various problems complete with commands and screen outputs. The materials that are presented in parts II - V are just incredible for knowledge of Dial up, ISDN, Frame Relay. This book is for people that need to have accurate and detailed information on Remote Access. Whether youre looking for foundational skills or need to troubleshoot remote access networks. You will be very happy with this book. After all it is in the CCIE Professional series, which should be enough to buy the book alone.

Apr 16, 2004     Rich Hill from Kansas City, MO
Caffeine and Concentration ESSENTIAL
I am reviewing Troubleshooting Remote Access Networks (ISBN 1587050765), part of the CCIE Professional Development Series from Cisco Press. This book weighs in at 800 pages, but the font size and subject matter make it feel like well over 1000. Normally, I try to average 50 pages of technical reading a day, but I had trouble getting anywhere close to that. The book is divided into 5 sections. Section 1 covers remote access fundamentals, while sections 2-5 cover Dial, ISDN, Frame Relay, and VPN technologies, respectively. The book is authored by Plamen Nedeltchev, an engineer who worked for Cisco during the development of much of their remote access technology. The problem with this is that its like discussing photographs with the guy that worked in R&D at Canon. He knows his stuff, but youd better watch out, lest you be drowned with terminology.

The author does a decent job of explaining the technical concepts, but he has a tendency to get wordy. Maybe Im having a bad month for cognitive focus, but I find myself phasing out while reading this book. If I really concentrate, I can follow the author for a chapter, but trying to hammer out day after day of concentration on this book is really hard. Id recommend it as a troubleshooting guide or as a desk reference, but as straight ahead CCIE study material, its too cumbersome. Read a chapter of this book, then go read a section of another CCIE book, then come back here for a few more chapters. That might make this thing easier to take. The book states that the reader should have at least CCNA level skills to read this book. I have to disagree and say that the reader must have passed the BCRAN exam for the CCNP before reading this book. The book is intended to teach troubleshooting, so youd better know the basics of the technologies and their implementation prior to reading this book. Also, if youre not in the mood for TLA & FLAs (Three and Four Letter Acronyms), then youd better get in the mood before tackling this book.

All of this may make it sound like I dont like this book. Thats not true. When Im in the right mindset, which is to say that the room is right, and the noise level is right, and I have the right level of caffeine, then I can read a section of this book and learn a LOT about the material that hes trying to convey (he IS an expert, after all). On that note, I have to say that I especially enjoyed the section on VPN technologies, as my personal experience and studies are quite light on the subject up to this point. It really piqued my interest in the subject. So much so that I think one of my next reads will be the Cisco Secure VPN Guide.

Im reading this book as part of my studies for the CCIE written exam. Im not sure if I needed this much information prior to the written exam. Im sure I probably could have gotten by with a re-scan of the BCRAN book, but Im also sure that I will be coming back to this book again and again during my preparations for the lab exam.

On my 5 ping rating scale, I give it a 3. !!..!

Feb 1, 2004     Wole from Baltimore, Maryland
The Authority of an Instructor !!!
Dr. Nedeltchevs demonstration of his mastery of the terrain is in no doubt. Like an Instructor, he walks you through the art of troubleshooting remote access networks, concentrating on 4 of the most popular remote access types; Dial, ISDN, Frame Relay and VPN. The modular layout of the text makes it an easy read, not just for CCIE candidates but an invaluable reference guide for the practicing network engineer, who is confronted with many of the troubleshooting scenario highlighted in the book on a daily basis. The book is organized into 5 parts.

Section 1 is a must read for everyone interested in Remote Access Network Technologies from the end user customer, planning to procure remote access service/solution to the service provider customer support engineers whose job it is to ensure customer satisfaction and the infrastructure engineers who are faced with ensuring the health of the system. This section quickly lay out the fundamental issues in Remote Access Network technology, as much as can fit in less than 150 pages, and still provide a good feel for the issues at stake.

Chapters 5 to 22 are where the real juice is. The almost 700 pages of text is divided into 4 modules, each dealing with one of Dial, ISDN, Frame Relay and VPN, in that other.

A feature I found very useful is the modular nature of the book, providing easy reference for the information you need. In practice, Engineers may not have to work with all technologies, but still find the book handy as a reference to the technology that interests them as well as a quick guide to troubleshooting that technology.

Chapters 5 through 8 describes dial technology and troubleshooting issues and chapters 9 though 13 explores ISDN technology.

Chapters 14 to 18 is on Frame Relay technology and as is the pattern throughout the book starts with an overview of frame Relay technology in 14, moving on to design solutions in chapter 15 and configurations in 16. chapter 17 explores the topic of troubleshooting frame relay network detailing specific commands and pointing to specific tools, while chapter 18 reviews some troubleshooting scenarios including new install, mismatched dlci, traffic shaping, ip multicast and even host migration.

The coverage of VPN is quite detailed (chapters 19 through 22) with description of VPN categories, link technologies and a break down of IKE an IPSec technologies providing the ground work for a full chapter on design and configurations which then presented a clear case for the troubleshooting chapter with Cisco equipment as benchmark. Chapter 22 looks at some real life VPN troubleshooting scenarios. Of course the application environment is windows. Linux operating systems users of the popular Cisco VPN software will have to get resources from Cisco website.

Like most Cisco press texts, this book has its share of IOS snapshots and scenario examples and lives up to its stated billings as a guide to understanding tools, commands and methodologies that enable reliable performance of remote access services

Having this book within reach when dealing with remote access networks is guaranteed to save you time, no matter what stage of the system you may find yourself, from planning though maintenance/support. For aspiring CCIE, I will recommend this as a must have.

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