Rating: 
Summary: Awesome Book
Review: Don has done a brilliant job in writing this book. Not only did he cover IPSEC and VPN technologies. He also covered IOS, which was great. This is an all one book. Before I had this book I was reading a multitude of books to find out information I needed. Once I read Don's book the search was over. Great Job Cisco and Don!
Rating:
Summary: IP++ : Beyond Routing!
Review: Great book that presents the material in a very structured manner
and in a way that is easy to understand. For those of you who are
looking for a good starting point on Quality of Service, IPsec
and other services, this book is for you. Beginners should have a
firm grasp of IP routing before moving on to this book. Although
this book is a relatively fast read compared to other Cisco Press
books, it's full of great information. Must have for your Cisco
library!
Rating: 
Summary: Make (very) complicated thing easier (not simple)
Review: I cannot see anything "awesome" or "the best" or "kick serious butt" in this book, nither can it be compared to Jeff Doyle and Kennedy Clarke classic. But one description is true - that it "presents highly complex information in a relaxed manner to allow for ease of understanding". The chapter on IPSec especially fit this description. Many other authors present IPSec in totally un-understandable and confusing manner - paying little attention to the fact that IPSec has layers upon layers of interwining and interrelated subtopics where you "see all the trees but cannnot figure out the jungle". Even MCNS course material left me with so many false concepts and numerous doubt on IPSec. Donald Lee do a most surgical dissection to cut off all these complicated and arguably unneccessary portions (e.g. IKE is IKE - totally left out aggressive/quick mode - and no Phase 1 & 2) and left you with a manageable IPSec knowledge (Still - prepare to read it 10 times to get a good picture). Other topics in the book - access-list, QoS, Routing protocol, Redistribution, IOS fireware etc - it display excellent teaching - but truely I do not need any additional help on these topics except perhaps IOS CBAC firewall - which again MCNS make it look so complicated.
Rating:
Summary: Excellent teacher, Good topics to see in a book!
Review: I liked this book for three main reasons: (1) It is very well-written -- what I mean by that is, the book explains the technologies clearly like a good teacher would, but without being simplistic. This is an advantage 'Enhanced IP Services' has over most 'technical' books I own. (2) The topics are relatively new, good for keeping sharp in today's Internet world, and (surprisingly) quite interesting. I do a lot of Cisco networking, but I would recommend this book to anyone who wants to learn more about IP, CIDR, routing, VPNs, stopping hackers, and IP quality of service. There's a lot in there. (3) What I didn't know before buying the book is there's also some quite handy appendixes. There's one that is like a 'Cisco IOS in a Nutshell,' which I thought I didn't need but I found some new tricks in there that are useful on Cisco routers. Another appendix reminds you how to fix a router if you don't know the password (useful when I get used routers). Bottom line: A great book for the Cisco or IP professional. Great job Cisco Press.
Rating:
Summary: One of the best...
Review: I must nearly have the entire Cisco Press catalog - but this book surely stands out as the best. There are other classics (such as Routing TCP/IP 1 and 2 by Jeff Doyle), but the author of this book explains things so clearly and with a minimum of complexity that you wish he had authored ALL the Cisco Press books. I did not get this book for the section on IGPs and their interaction but rather for the chapters on QoS and Security - and in no time i had configured RSVP, WRED and IPSec VPN's with IKE all with a good solid understanding of the underlying technologies. Fantastic! If you are a network engineer, with even some relativley light Cisco skills, then this book will have you understanding some more complex and useful topics in no time. It serves as a great primer for those more complex Cisco tomes.
Rating:
Summary: Incredible balance of info and easy to read
Review: I read a ton of tech books. This book is an easy read that is not to long on any subject but detailed enough to help you through the basics of any of the included topics. I love the section on ipsec, its killer.
Rating:
Summary: Excellent! New technology and well-written. Learning a lot
Review: I was very happy to find this book because it covers topics I've not found together (and done well) in other networking books. Particularly, I have found IPsec (VPN), Quality of Service, Security, NAT, and intrustion detection well covered and timely. I like the practical and brief explanations of Cryptography techniques (wasn't all mathematical and abstract). The author does a good job explaining VLSM (one of the better I've seen). There are some "advanced" routing topics there too (the author seems to make some CCIE test hints, might help me). What I really like is that he clearly explains each IOS command line-by-line. I have lots of net books, but this book is unique, well-written, and a keeper. The book takes a stance that you should get more out of your routers by using more of the technology in Cisco IOS. It has given me some good ideas for our network, some that I've started to implement (like anti-spoofing access lists). I'm a bit surprised that some of the topics are fairly new (bleeding edge?); like Class based weighted fair queuing which just came out in IOS 12.0(5)T! I highly recommend this book for networking professionals, especially those who are bored of routing books (like myself).
Rating:
Summary: Wow! It's all so clear now!
Review: I've had this book for a while and bought it because I wanted to know more about VPNs and also due to good reviews. Anyway, the VLSM part is truly outstanding. So is the IPSec section. Then, I started working with PIX for a while so this book was gathering dust until this week when I had to setup a new IOS router for the first time. Since I had never worked with IOS, I reviewed the sections that I had skipped before and they are just as great. CBAC (IOS FW) is clearly explained and shows best practice access-lists, etc. I am also glad to have discovered Annex E (IOS crash course). This author really knows how to convey a somewhat complicated (well, not anymore) subject in such simple and logical manner. Thanks Mr Lee.
Rating:
Summary: Wow! It's all so clear now!
Review: I've had this book for a while and bought it because I wanted to know more about VPNs and also due to good reviews. Anyway, the VLSM part is truly outstanding. So is the IPSec section. Then, I started working with PIX for a while so this book was gathering dust until this week when I had to setup a new IOS router for the first time. Since I had never worked with IOS, I reviewed the sections that I had skipped before and they are just as great. CBAC (IOS FW) is clearly explained and shows best practice access-lists, etc. I am also glad to have discovered Annex E (IOS crash course). This author really knows how to convey a somewhat complicated (well, not anymore) subject in such simple and logical manner. Thanks Mr Lee.
Rating:
Summary: This book kicks serious butt
Review: If you are interested in learning about IP Sec this book is for you. I have been looking for a book of this type for a long time. Other items touched upon: Default Routes, Route Maps, Queueing and Access-lists
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