Cisco Books

I recently purchased this book based on the rave reviews even with an updated second edition off the press. I can honestly say that this book is Awesome in detail and explanation and is still extremely relevant to understanding the how too's and processes involved in routing tcp/ip. The most amazing feature about this book is how well explained and the book makes topics that would normally seem dificult or confusing easily understood, in other words grandma could learn how routing tcp/ip works from reading this book!

Brandon, Rome, GA

Great book for understanding IGP in details.

If any book was ever considered as the MUST HAVE BIBLE for Interior Routing Protocols - then Jeff Doyle's first effort on IGPs is THE book (how many cliché's do you want in one sentence)!! The book goes through at a very even pace - dissecting and describing the majority of both open-standard IGPs (OSPF, RIP and a little on ISIS) and Cisco-proprietary IGPs (IGRP and it's beefier brother - EIGRP). The book also includes some invaluable appendixes - including tutorials on working with Binary and hex.

But let's focus on the book's main reason for being - explaining IGPs. Take for instance OSPF - one of the most popular and widely implemented routing protocols in use today. On page 416-417, the book correctly discusses virtual links as a type of network type. The OSPF chapter typically employs 5-8 routers (and shows the required configs). Such a daunting exercise may at first seem like overkill, but Doyle is able to show how (and why) the all these router configs are necessary (to show, for instance, how they interact with or whether a DR or BDR). The book does have it's typos though, as the table on page 484 incorrectly documents stub networks as allowing type 5 and 7 LSAs (not so - thus a stub!)

I cannot imagine there are many CCIEs out there that do not have this book on their bookshelf.

I give this book 5 pings out of 5:
!!!!!

I am reviewing Routing TCP/IP Volume 1 (ISBN 1578700418), part of the CCIE Professional Development Series from Cisco Press. This book is widely regarded as part of the "Holy Trinity" of CCIE preparatory books. In addition to CCIE prep, it is also highly valued as an essential desk reference for anyone pursuing a career as a senior-level routing engineer. The author, Jeff Doyle, having written the two most recognized tomes on IP Routing, is a respected authority on the topic. His writing style is very clear and not at all difficult to read, which sets him apart from a lot of the authors in the "high-end routing book" category.

The book is part of a set of two books. TCP/IP Volume 1 contains coverage of the major interior routing protocols (RIP, IGRP, EIGRP, OSPF & ISIS) and follows it with coverage of route redistribution, filtering and mapping. TCP/IP Volume 2 covers the BGP exterior gateway protocol and follows it with coverage of advanced IP routing issues. As someone who's come up through the CCNA-to-CCNP-to-CCIE-candidate path, I recognized all of the topics from the BSCI curriculum. All this book really does is takes them to another level of depth. I highly recommend this path of coming at the CCIE, because unless you've done it all and seen it all, there's way too much information to take in during a single reading. Reading the BSCI book first gets you familiar with all of the topics, so that you're not overwhelmed when reading the Doyle books.

While many pan this book as being outdated since it was written in 1998, my contention is that all of the covered topics are still fair game for the CCIE qualifying written exam and the book still retains all of its original value. There are a lot of topics which are on the test which are not in Doyle's books, but if you look at the CCIE blueprint, the topics covered in the books map exactly to the topics in the IP Routing & IP Multicast sections of the blueprint. You can't treat any book as being a one stop shop for CCIE preparation. That's impossible. The book would be the size of my desk. I would actually contend that, on the next rewrite, they should break the 2 volume set into 3 volumes, one for the interior protocols, one for BGP by itself, and one for all of the advanced routing issues and multicast. This would make the volumes a bit less daunting and also somewhat easier to carry.

But, carry-ability issues aside, this is a very good book. It takes all of the topics to the degree of depth which you would expect for a CCIE-level book and explains things in a way that doesn't lose the reader. I had to work to keep the examples straight in my head, but no one said becoming a CCIE was easy. On the downside, the book contains no disc. This is unfortunate, because I always like to have the book on PDF. Also, it would be nice to have the review questions and answers put into a question bank. The book is also missing the "Do I Know This Already" section for each chapter, which is present in all of Cisco Press' certification guides. I realize that this is probably due to the fact that this is more of a desk reference / learning book than an official certification guide. However, as someone who's studying for an exam, I always like as many free practice questions as I can get.

I give Routing TCP/IP Volume 1 a 5 on my 5 ping rating scale and look forward to reading Volume 2.
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Routing TCP/IP Volume 1 by Jeff Doyle (ISBN 1578700418) is an advanced level book on the theory and practice of routing and its implementation in Cisco routers. The 1026-page book (with a 50+ page index - always an important part of any technical book) is packed with useful information, example network architectures, and sample commands and their corresponding outputs to help the reader get a thorough grasp of real-life application of the theory.

The book is meant for working professionals in the network and routing field. Part I presents some basic routing theory along with the routing types - static and dynamic. This section, as in other books, is meant as a review for those seasoned engineers who have been working in the field for some time. It also helps to bring up to speed the other readers who may lack the necessary background. Part II contains the real substance of the book. It covers the interior routing protocols in detail including RIP 1 & 2, IGRP, EIGRP, OSPF, and IS-IS. The material presented in these chapters is definitely solid enough to give a detailed understanding of the subject matter and provide the necessary knowledge to allow one to troubleshoot the problems that creep up in maintaining networks running these routing protocols. Part III presents the issue relating to the optimization of networks running these routing protocols such as filtering and redistribution. Part IV consists of the appendices.

The most useful part of the book in my opinion is the examples and sample outputs. These really help the reader to understand the details on implementing the concepts presented in the book. Jeff presents a sample network architecture and uses that architecture to explain various aspects of the topic being discussed. For example, to illustrate various aspects of EIGRP routing and load balancing, a 5-router mesh architecture is presented followed by a detailed discussion of concepts such as succession, load sharing, route transitions and updates, etc. This approach really helps in understanding all aspects of a particular topic with concrete examples to relate to.

I took hold of this book not to help in preparing for the CCIE but to assist in the understanding of routing protocols that I use in my work life. As such, I can not comment on the applicability of this book to preparing for the CCIE exam but as for its application to real world scenarios, this book far exceeds any other on the topic of routing in the Cisco environment.

I am really impressed with the material presented in this book. The book is thorough and detailed in its coverage of interior routing protocols. Jeff Doyle is an expert in his field and this book proves it. On a scale of 1 to 5 with 5 being the highest, I give an enthusiastic 5 to Routing TCP/IP Volume 1 by Jeff Doyle. I can't wait to get my hands on Volume II.

This is a really great book on BGP and Internet Architecture. The explanation of BGP at the protocol level is great. More importantly though is its explanation and examples of using eBGP / iBGP with an IGP.

I've heard it criticized as being dated and too Cisco specific. Though it is Cisco specific, it's still very relevant. I would start with this book and read past NANOG presentations on introductory BGP if I wanted to learn how the Internet works.

Internet Routing Architectures is considered the BGP4 handbook and rightfully so. I found the overall composition easy to read. Even though the book is aimed at varying levels of expertise, it does not assume any level of knowledge in TCP/IP or routing. It explains all the concepts, from the simplest one right up to the most demanding, in a fluent way. The book works hard not to withhold protocol details and design-oriented information, while at the same time realizing that building general understanding comes first. An in depth look at BGP is supplied here from the theory aspect, if you need actual configurations and commands I suggest also:

Cisco BGP-4 Command and Configuration Handbook : CCIE Professional Development

This is a good book, let there be no doubt about it. But in my opinion it goes beyond the scope of the 682-661 exam for which purpose I bought it. However, every ISP backbone routing engineer should have this book with him and use it as a dictionary in case of.

This is the best BGP-4 book out there in preparation for the CCIE. Do not waste your money on others this is the one that you need. It takes you from the beginnings of the Internet to the current uses of the protocol. This book is a must have.

I have always felt that I am part of the small minority that just does not see the beauty of this book if studying for the CCIE. I have, for years, read other's comments on the how Halabi's "Internet Routing Arch" is a `must have', yet I still have not found a similar reason why. While I do feel that the book does (probably) the best job at explaining BGP and how to implement BGP in a Cisco-centric world, I have not discovered the value for the CCIE. I would much rather spend my time with CiscoPress's "Routing TCP/IP" Volume 2, by Jeff Doyle and Jennifer DeHaven Carroll than this book.

One item of concern, there is a noticable amount of trivial errors in this book that can lead to disaster if implemented incorrectly. For example:

Page 106 - "...any traffic that has an origin OR destination that does not belong to the local AS." This clearly should be an AND, not OR.

Page 315 - "You can also specify a PREFIX list..." - I believe this should be a filter list, not a prefix list.

And then there are places where the book is too opinionated - for example - page 206 "Many operators choose to filter dynamically learned defaults to avoid situations in which traffic ends up where it is not supposed to be." I do not feel this is true, and can think of multiple times when not filtering the advertised default route may just end up being the worst option. In fact, I do not feel either configuration is the right configuration to admit or condone, as the wrong configuration can have disastrous effects.

I still have to give this book 4 stars - simply because of it's utilitarian value and overwhelming sense of loyalty given to this book by others. But I don't reach for this book too often.

I give this book 4 pings out of 5:
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I am about 3/4 of the way through at this point. It is a fantastic book with a lot of good information. I would highly recommend it for anyone looking for a good methodology for network design. There is also a lot of good hints for things to keep in mind while designing the network.

This book is a very comprehensive reference source and working guide for 3G mobile networks. If you're only going to buy one book on the subject, this is it.

I purchased this book with the intent on gaining a further understanding of the network design process. I really didn't expect the book to give me as through an understanding of network design as what has turned out to be the case. Coming from the network support side this book has been a tremendous compliment to my support and logic in how traffic flows from A to B. I feel now that after having read the book which is an EASY READ that I have come away with enough knowledge to auctually design and implement a small to midsized company network. The authur does an outstanding job of presenting to the reader the many processes involved in through network design, network logic, and what exactly happens when your pc 1st boots and why it takes so long for the logon screen to appear "if this is the case on your network", and countless other topics. If you are just getting into network design or have been in the field and are a seasoned veteran I highly recommend that you add this book to your networking library.

Like the carpenter, the network designer does well to develop a plan before purchase. The title, Top-Down Network Design, is accurate because the author's key approach throughout the book is to consider what works best for the end user and meet the goals of a Request for Proposal. Priscilla Oppenheimer has presented a well structured textbook that covers every facet of networking in general with the intent of training the reader in the best practices of network design. The point of this book is to discourage going straight to product catalogs and picking out hardware when assigned a network project. Even if the customer is not given an RFP, the designer should present an overview of the project that includes the goals and how those goals will be measured.

The reader should have some basic knowledge of networking. However, this would make an excellent text book at a university or trade school since Oppenheimer covers all of the logical concepts and physical aspects of modern networking. The well read and experienced network engineer will find it a good review with a unique insight or tip sprinkled just often enough to make it worth the read. Except for the CCDP exam, the book is primarily a supplement to the student, but a must have reference for the consulting and design professional.

Oppenheimer gives well thought through, easy to read descriptions of technologies. For example, page 208 gives the most succinct explanation of how IPv6 works I have ever read. Another practical lesson is her definition of the "Heisenberg uncertainty principle" as "the act of observing something can alter what is observed." Consultants should be careful that their analysis doesn't become a problem in itself. Top-Down Network Design is a reference you will want to check yourself and those you hire.

Top-Down Network Design, Second Edition is both a new terrific book and still a terrific book. The original took a systems approach to designing a network which could provide the service the people paying for it expected, partly by getting them to clarify their expectations and needs. The new Second Edition does this, too, but it includes material relevant to the networks being implemented today, and they are very different networks than we saw even three or four years ago.

New technologies, such as VPNs, VoIP, IPv6 as well as v4, Gigabit Ethernet and 10GigE, etc. are covered as part of a networking solution, not just as cool and sexy technologies to be rolled out for that reason. Likewise, new business emphases like reliability, redundancy, resiliency (which are not the same thing), security, and even survivability are addressed. Not all new technologies will help solve these problems, and, more often than not, they aren't even necessary. Thoughtful planning is far more important, and working with the network as it is now, toward what it is desired to become, is how you can really solve these problems.

I think one of the greatest techniques you can learn from TDND, 2e is to characterize the flows of traffic on the network. Priscilla Oppenheimer gives several examples of developing such analyses in a variety of situations - campus networks, WANs, a design testing scenario, and so forth. The Appendix with workstation bootup traffic information is especially helpful - the only thing I would have liked to see that I didn't was a little more detail on the contents of the various packets involved, but it is an Appendix, and using a sniffer will let you see them for yourself.

I have both the original and the new Second Edition - and getting the new one is definitely worth it. Networking has changed, and this book will help you handle the new material.

This is a great book on Cisco networking, so just buy it now. I've tried reading the CCNA prep books before but never got around to finishing them because they got into too much detail and I wasn't working with Cisco products enough to get hands-on experience.

At my current job I'm more involved in networking, so when I saw this book, I thought I'd give it a shot. So far it's been very helpful. This book is strictly practical in nature, so you won't get a lot of detail on Ethernet framing or the OSI model. (Note to author, it would be helpful in the second edition to include one concise chapter on the OSI model and network protocols as a refresher.)

If you have a certification such as MCSA, MCSE, Network+, or CCNA, you will have all the background info you need before reading this book. If you have no networking knowledge at all, this book is not for you.

I've been skipping around reading different chapters (this is the kind of book where you can do that). This is one of the few IT book that I've read that actually gave me practical info that I could put to use right away. Here are two examples:

1.) From Ch 2 regarding auto-negotiation: In June 2008 we moved to a new office that had all new gigabit Cisco switches that replaced our 10/100 switches. A few weeks after our move we started getting reports of errors when saving files to our EMC Celerra NAS. Users would get errors saving files to the NAS and their computers' system logs would report a "Delayed Write Failed" error.

Source: MRxSmb
EventID:50
{Delayed Write Failed} Windows was unable to save all the data for the file \Device\LanmanRedirector
The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

This looked to be a network issue so when I was poking around the Celerra Manager I noticed that its NICs were hard coded to 100 full duplex. Since we were on gigabit switches that were set to auto-negotiate, I deduced (from the knowledge gained in this chapter) that the EMC devices should be set to auto-negotiate as well. So after contacting EMC and then changing the EMC NICs to auto-negotiate, we've had no more reports of these errors.

2.) From Ch 9 regarding routing: I ran into an issue with improper configuration of the gateway of last resort during our office move. For whatever reason, the gateway of last resort was not configured on our new VLANs. We noticed the problem because we couldn't get to the Internet, but we could get to our other offices. When our network support vendor walked my manager through running the sho ip route command, I immediately saw "gateway of last resort is not set" at the top and knew that it was the issue. So even though I had only been reading this book for two weeks, it paid off. I'm sure the vendor would have found the issue after a few more minutes, but it was nice to be able to point out the issue to them.

I found this book to be absolutely remarkable. The text at the top about it being what you need to be that wasn't on the CCNA is all too true.

Mr. Donahue's writing style is what makes the book. He explains often complex topics in a manner of a grizzled old veteran telling a war story. He doesn't break down into the deep technical details, he tells you how it works and why you should do it the way he's telling you to.

There's more that goes into being a network monkey than just knowing what commands to type, and the insight he offers into the more social aspects of how to be a network guy are invaluable. It is my honest opinion that the final chapters, particularly those on how to deal with management and being a nerd, should be required reading for anyone that works at a technology company.

It is my sincere hope that Mr. Donahue continues his writing career and takes his style of communicating to other complex subjects. I would love a dissertation of BGP written in the same manner, for example.

If you're a bright shiny new CCNA, or studying for the CCNA, and you're serious about pursuing a career in networking, buy this book. It won't help you pass any exams, but you'll find it as one of your favorite reference materials nonetheless.

I loved three things about this book:

1- The simple style it conveys from cover to cover. Every subject in network administration is divided into short but detailed chapters in order to keep the reader's attention focused. Anyone can write a book that lists an experienced user's knowledge of the subject, but it takes a real engineer to compile the data in small doses of knowledge.

2- The clarity of the information mentioned. The author uses the same style of defining the problem, suggesting the best solution, and detailing the technical commands to implement the best solution.
Common pitfalls, problem symptoms, and real life examples are provided as well.

3- The deep coverage of the subject at hand. The author goes over almost every subject in network administration, but without the extra fluff. It's really what you need to know.

Definitely a great buy.

Network Warrior is another quite useful O'Reilly effort in the Cisco handbook space. It really is potentially handy for many real-time network operators. One thing I wish the author had spent much more time on is Ethernet switching. He does dig into some of the quirks of configuring VLANs in the Cisco environment but to my way of thinking associated subjects (mirroring, span port config, spanning tree troubleshooting) need a lot more exposure. One area that cannot be talked about enough are the twists involved in setting up spanning tree through a complex VLAN network. Another potentially vital topic involves interoperating with other vendors' equipment in a spanning tree network. I bought this book hoping for more exposure than I got in those areas. This is the only reason I didn't give it five.

One of the best networking books I have read, period. Not just how it works, but why it works and should be configured. After you study and obtain your CCNA, this is the next read that will fill in many information holes.

Highly recommended.

An excellent step through Cisco networking. This book begins with the definition and ends with future development. All aspects of high speed networks are covered along the way.

John has succeeded in making the whole complicated area of what happens behind the computer seem easy to understand. He has explained how to use technology to one's advantage and understand the value of doing so. A well recommended read.

I gave the book as a gift to a friend who is the CIO of an ISP and I know he went out , bought 10 more copies for all of his managers and thanked me with a note saying the John Vacca book is a God sent for his business. What more can I say

With the rapid advances in technology, upgrading of high speed networks will occur sooner rather than latter. High-Speed Cisco Networks by John Vacca provides experienced networking professionals with a step by step approach to all they will need to know about Cisco's LAN and WAN systems. It is the reference tool to use to understand the Cisco products so that planning, designing and implementing a high performance LAN or WAN system can commence.

I have been working in IT & network support for some years now, and am currntly untaking the Cisco Acadmey programs. This book turned up at the right time, as it explains things with greater clarity than anything else I have found. The presentation is logical and of a linear manner, making this my first choice in reference material, for both my studies and professional undertakings.

I come from a routing shop - never having a customer need for Multicast. This book brought me up to speed very quickly on the both the beauty and ease of Multicast. As a tool for my CCIE studies, I felt the first 200 pages were of immense value at helping my studies. I felt Chapter 5 (on DVMRP) was not nearly as valuable as Chapters 6 and 7 (on PIM-DM and PIM-SM).

Some typos I was able to pick out:
page 144 - 2nd line from bottom should read "...it too sends a Graft message to Router C" - not Router D.

page 168 - 3rd line on the 1st paragraph should read "...SPT to pull the (S2, G) traffic down to the RP..." - not (S1, G).

There are some other typos, but they are few and far between (but I'm not an expert on multicast!). I have heard of this book being talked about as the 'bible' for multicast - I can see why.

I give this book 5 pings out of 5:
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I was skeptical about buying a book this old, but I just finished it and am still slightly amazed at how little has changed in multicast technology in ~8 years. I have read Doyle's multicast coverage, listened to InternetworkExpert's excellent "class on demand" (CoD) on the topic many times, and worked through over half of their 20 CCIE lab scenarios, all of which have multicast sections. This doesn't make me an expert by any means, but I know enough now to recognize that the material in this book is still worth reading.

The differences between this book and Doyle's (2004) are:
- Williamson dedicates a lot more effort to explaining the mroute table. This was my single biggest stumbling block in multicast routing
- Doyle, IMO, gives IGMP a better treatment
- Doyle goes over mtrace and mstat
- Williamson spreads the information out over more pages via liberal usage of config snips and diagrams, often one per page. This allows him to go into *brutal, painful and excruciating* detail about every line in the mroute table, every flag, every state transition, etc.
- Williamson does a more thorough job of explaining exactly what happens in PIM-SM networks (100+ pages to Doyle's ~25)
- Doyle goes over Anycast RP and gives a better explanation of MSDN, which appears to have been rather cutting edge when Williamson put finger to keyboard

I finished the book in about a week of serious effort, but I skipped the following chapters (Cisco has not put much effort into the technologies described), leaving me with about 400 pages of groovyness:
DVMRP
CBT
MOSPF
Connecting to DVMRP Networks
and several sections of other chapters

To be sure, some things have changed. I didn't see any mention of the "ip pim autorp listener" command, which negates the need for sparse-dense mode when configuring Auto-RP (can't recall if Doyle mentioned that either). Also, in current versions of IOS one *does* need to specify the RP on the RP itself, whereas Williamson (and Doyle) explicitly say this is not the case (they were both right at the time of print, Cisco has changed this). Overall however, I would say that easily >95% of the material is solid here.

So which book to buy? Well if you're serious about the CCIE and/or running a multicast network you'll get both, and read them both several times. I do hope Williamson updates the book though, as he alludes to several draft proposals, and gives a "state of the multicast internet" address that I would like to know more about without digging through two dozen RFCs. Also, the few things that have changed would be a boon to the book.

Multicasting is truly a technology solution in search of a problem. Excepting highly specialized conferencing applications (a few of which are mentioned here) it is difficult to see how multicasting can be a money-making service for carriers and providers, and the protocols have yet to really penetrate to wide deployment. That said, knowledge of this separate realm of IP networking is a must for any professional in the telecom space.

I'm glad to say that this book rewards determined scrutiny. As a technical writer supporting a very complex product line that has recently added PIM-SM to its bag of tricks, I've found this book painstaking and tremendously informative. You will need to understand IP networking before approaching this title; on the assumption that you do, you will fully understand shared trees, SPTs, and their combination in PIM to an absolute fare-thee-well. My focus when reading this book was on IGMP and PIM-SM, so I have not read absolutely every page of this title. However, Williamson breaks the processes down packet-by-packet for each protocol in the multicasting suite in almost excruciating detail. Advanced coverage of topics such as registration, pruning, and Rendezvous Point behavior means that you will have complete mastery of Cisco multicasting, and for any platform that conforms to the standards, by the time you are finished.

This is an excellent, excellent effort in what I think is a consistently solid networking series.

Multicast has for several years been used in LAN environments to easily exchange information among users, especially in educational and academic research environments. The advent of audio and video conferencing has increased its use in these environments, and it is now making its presence known in WAN and Internet environments. This book gives an overview of the how to implement IP multicast on Cisco devices, and does a good job in that regard. Readers with a general knowledge of networks, even those who have not administered Cisco devices explicitly, can gain much from the book. This reviewer was not interested in the actual implementation of Cisco multicast networks, which is covered in Part 3 of the book, and so this review will concentrate on the other three parts of the book. These parts are mostly descriptive, but they do discuss some of the performance issues involved with the deployment of IP multicast, although nowhere in the book are test cases discussed, even though their inclusion would have been extremely helpful. Multicasting by itself is not a complicated phenomena to understand and use, but when it is deployed over Layer 2 or when coupled with QoS some interesting issues can arise. This reviewer was mostly interested in traffic engineering in multicast environments, and the author spends an entire chapter on this topic.

The book begins with a history of multicast and the MBone, the latter of which is a collection of Internet routers and hosts that are interconnected and are able to forward IP multicast traffic. IP multicast is of course an unreliable transmission mechanism, based as it is on UDP. Along with stating the assigned scope of the multicast addresses over IP, the author also reviews the scheme for multicast MAC addressing. The MAC address mapping will cause a CPU performance hit though since the CPU will have to be interrupted in order to deal with all 32 of the IP multicast groups. This arises since the IP multicast address information cannot be mapped into the available space of the MAC address space. There is a 32:1 address ambiguity when an IP multicast address is mapped to a MAC address.

One can summarize the properties of the multicast routing protocols discussed in the book straightforwardly:

PIM (Protocol Independent Multicasting) can run in three different modes, namely Dense (DM), Sparse (SM) and Sparse-Dense. A router will always forward multicast traffic on a dense mode interface unless all the PIM neighbors of the interface prune themselves from the multicast tree. Multicast traffic will be forwarded on a sparse mode interface only if at least one of the PIM neighbors explicitly joins the multicast tree. In sparse-dense mode, the interface can be running in sparse mode for some groups and dense mode for others. There is a "hello interval" for PIM multicast which is the frequency at which the router will send PIM query messages, the latter of which are used for selecting a PIM designated router. The PIM designated router is responsible for sending IGMP (v1) queries. Bootstrap messages can be forwarded from an interface in PIMv2. This allows all PIM-SM routers in a domain to dynamically learn all Group-to-RP mappings.In PIM-DM, the multicast traffic is periodically forwarded even on pruned interfaces of a source-based distribution tree. This allows the learning of membership changes. This 'state-refresh interval' can be configured on the first-hop routers of the multicast source, allowing the interface to periodically send a state refresh control message down the source-based distribution tree. When doing multicast in an NBMA (NonBroadcast MultiAccess) network, a router will replicate multicast packets for all neighbors configured for broadcast (actually pseudobroadcast to use the author's characterization). To avoid this, one can configure the router in NBMA mode, which will then only allow the replication of packets for PIM neighbors. NBMA mode is only supported by Cisco for SM networks.

DVMRP (Distance Vector Multicast Routing Protocol) does neighbor discovery, where network routing information is exchanged between neighbors. This information consists of Route Report messages that advertise a source network and a hop-count. DVMRP generates two routing tables, one is a multicast routing table to the receivers and a unicast routing table to the sources. When forwarding, a DVMRP router will use the unicast table for RPF (Reverse Path Forwarding) checks and the multicast table for forwarding multicast packets. When doing unicast routing, the router will use the unicast table for the RPF check, but will use a different multicast routing protocol for forwarding multicast packets. There is a metric value associated with a DVMRP unicast route, which is the sum of the interface metrics of a route between the router originating the report and the router in the source network.

For multicast traffic, one can control bandwidth with: 1. Aggregate rate limiting, which sets an upper bound for all multicast traffic being sent on an interface. 2. Mroute table entries wherein each individual multicast stream is set to a maximum rate. 3. `Scoped zones' and multicast boundaries, which prevent multicast traffic with a high rate from traveling outside the provisioned regions. Doing actual multicast traffic engineering is complicated do to the need for calculating the proper RPF (Reverse Path Forwarding) interface (and not the destination IP address). The author discusses in detail some of the techniques that can be used, such as GRE tunnels and `pseudo load-sharing.' GRE tunnels are used to do load-splitting of multicast traffic, which cannot be done otherwise since multicast is allowed only one incoming interface. He also describes how to do traffic conversion between broadcast and multicast, this being allowed for Cisco IOS 11.1 or later. This is a useful capability for networks where the source or the receivers, or both, do not support IP multicast.

This is the best multicast book on the market. It is a must have whether you are preparing for the CCIE Lab or just want to understand multicast.

The explanation was simple and clear. There are tons of configuration examples covering pretty much all kinds of scenarios. The author actually explained every single line of the configurations.

I bought this book for my Lab exam, and after two days of reading, 99.99% of my questions were answered (the only one I still have is I actually made PIM-DM work in a hub-spoke frame relay network. The prune message from one spoke was actually seen by the other spoke, I don't know why the hub would forward it out).

I have to admit this is one of the best books I've read for a long time. Just like Jeff Doyle's TCP/IP Routing is the Bible of IGP, this book is the Bible of Multicast.

Very clear explanations of the core security technologies. The author doesn't shy away from the hard subjects, and makes them quite accessible. The IPSec chapter is the best explanation of the subject I have seen anywhere.

I used this book to pass the CCIE security written exam, and highly recommend it. It is also a very good reference for practicing consultants and network security architects.

Not only for exam preparation, this book is for every Cisco lover. Covers a lot of stuff, took me over 2 months to finish but I feel way more knowledgeable now.

CiscoPress's "Network Security Principles and Practices" by Malik is truly an awesome work. The book weighs in at over 750 pages, and not a page is wasted. The book is split up over multiple sections (Intro to Network Security, Building Security into the Network, Firewalls, VPNs, IDS, AAA and ISP Security). I have found this book of value as I pursue my CCIE Routing & Switchng lab and to better enhance my basic understanding of Cisco's vision towards network security. I also used this book to prepare for my CCSP and CISSP studies.

Practically on every page is either a diagram or detailed configuration explaining the subject at hand. In particular, the configuration examples are extremely helpful as the configs, themselves, are appended with detailed notes of their syntax. Chapter 13, IPSec, is probably the best one-chapter discussion on Cisco's implementation of IPSec and VPN I have found anywhere (and I have over 50 CiscoPress books). Another testament to it's superb level of expertise is the few and far between typos or errors that I have found.

One item to note - you will need to block off a few weeks (or months) to fully understand and appreciate the value of this book. I reference this book often, as I find information in this book I cannot find documented or presented the same way in other books.

I give this book 5 pings out of 5:
!!!!!

Very, VERY good. The IPSec chapter alone is worth the book, and the AAA chapters are _great_. Saadat has been able to explain in a great technical level and very clearly subjects which you're going to find in your day to day work - if working with Cisco and security. But not only that: chapters about IPSec, RADIUS, TACACS, are of value even if you do not use Cisco gear.

Missing from the book: a better chapter on NAT, PPTP. Saadat should write the 2nd edition adding those two topics, updating the IDS section, IPSec (including NAT-T), maybe add a little something about SSL VPNs, PIX 7.0 ? The section on ISP security could also benefit from a refresher (CoPP, uRPF?)

4.5 starts because it shows it age - otherwise, 5 stars for sure.

This is one of the first books I read for anyone preparing for CCIE Security. I found this book to be very comprehensive in its approach. The author has combined all the network security technologies in one book and now this is tough. It starts with an Introduction and then builds on that. It covers the whole nine yards VPN's Firewalls, IDS, Access Control. The Troubleshooting part of the book is very helpul to working professionals as it starts with troubleshooting NAT and then covers everything from Firewalls (PIX and IOS), VPN's, IDS and AAA. A lot of issues can be resolved just using this part of the book. I recommend this book as it will surely help everyone looking for everthing about security. This book is a must read for professionals pursuing the CCSP and CCIE Security Certifications.
Niloufer Tamboly, CISSP

I bought this book for reference rather than than study use, but it has served its purpose well. First, this book provides decent coverage of Cisco Pixes. Brief overviews are provided of key technical concepts - enough that you can understand what exactly you're configuring. Secondly, the book provides excellent example configurations, even going so far as to step you through basic software setup. (i.e. A step-by-step guide to setting up the integrated PPTP Windows 2000 VPN client, including screenshots). Finally, it provides some of the best coverage of Cisco Pixes that I've found outside of Cisco's website.

There is only one thing I would have liked to see included in this book: A basic configuration example for those who want to use the Cisco Pix as a termination point for Cisco VPN Client connections. For THAT, I had to go hunting for information on Cisco's website. Thus far, this is my only complaint about the book.

I can whole-heartedly recommend this book for anybody who needs a good reference on setting up, configuring, and managing Pix firewalls.

Excellent book, everything you want to know about the Pix. Very thorough, topics are explaned well, in great detail and with good examples. This is the best Pix book on the market that I know of.

I got this book to configure a Cisco Secure ACS with VPN clients, and i reached my goal. And you can get many other topics in a cookbook style. You can read the technical information or only take ideas from examples. Excellent PIX firewall book.

This book well and truly paid for itself after the first couple of chapters. We found a number of areas where our setup was wrong and this book provided a very indepth look at the PIX product and enabled us to fix this easily and quickly. Good book for all users.

If you use PIX, get this book, it has a LOT of great info.

Although I haven't had to use this manual yet; as I haven't been out of Cisco school for very long; I'm sure it will be VERY handy down the road after I have forgot half of my command line parameters! Seems to be just as advertised, and it is a handy size to fit in my laptop carrier.

Great book to have. Small so it fits in my lap top carrier. Cisco has so many commands and when you don't use all of them everyday, sometimes it's hard to remember. Also if you are a CCNA student, this is great for CCNA-2 when you start working in the lab. You can find any command in this book that you need.

Great product, either for real life or to study for the CCNA. I do wish they made a version w/ spiral binding.

Must have handy quide and reference for those commands not used everyday and a refreasher on those you forgot! Maps perfectly the Cisco's CCNA network academey classes (CCNA 1,2,3, & $). I'd also recommend the "CCNA Portable Command Guide" too.

Chris

If you are going through the Cisco Academny you will thank you're self for buying this book. Everyone who see this book, rushes out and buys it. It is well worth the money.

I don't write many reviews, but I had to say something for this title. Within 48 hours of receiving this book (along with "Hardening Cisco Routers" also from O'Reilly) I had put some of these recipes into production.

I even find that I can read each chapter like a study or reference guide due to its excellent structure. The first few recipes of each chapter are very basic and explain the concept of what you are trying to achieve. However the author clearly states that the basic solution is either full of pitfalls or security holes. The following recipes cover each pitfall or hole until the last recipe, usually titled 'Putting it All Together', is a full fledged, practical solution with no theory.

The theory and study guides should take some cues from this book, and begin really teaching real-world networking.

ONE WARNING - This book covers working with routers primarily. "Cisco Router Cookbook" would be a more apt title. However I have applied some of the VPN router concepts to Pix firewall configurations.

Mr. Dooley, where is the Cisco Switching Cookbook!!??

As a telecommunications engineer I've read a lot of Cisco books and this is by far one of my favorites. The format: (problem - solution - discussion) really helps tie in the theory with the reality. It is well indexed and I found the discussion sections to be particularly well written and illuminating. I go back to this book time and time again and I am looking forward to purchasing the latest edition. Although not really intended as a study guide for certification I nevertheless found it helpful in clarifying concepts that other books could not. When you're ready to get your hands dirty in a Cisco router this is the book to take with you.

This is a great reference for anyone who supports Cisco routers, BUT... some of the sections are out of date, for example, the section on QOS. Also, a section that needs to be added is MPLS. I would buy a new version just for these two enhancements! Hopefully it is being updated right now and we'll see a new printing this year!

If you are an administrator and you have forgotten details about a router configuration, that you need. this book will be the real lifesaver.
Basic and advanced router config have been included and all the topics are grouped and explained in a clear way.
I found Chapter 9:BGP very useful, showing a hard topic by using a easy to understand solutions.

Si eres un administrador y se te olvido detalles de una configuración, este libro realmente te ayudará.
Se han incluido configuraciones básicas y avanzadas y los temas están agrupados y se explican brevemente, pero muy claro.
Me intereso el capitulo 9 sobre BGP, en que muestra un tema difícil de entender, en una forma sencilla con ejemplos claros.

Cisco Cookbook is a a complete reference guide for field engineers and Network Administrators. The book has practically everything you need to know to competently configure cisco routers for a production environment. However, if you do not already have a working knowledge of Cisco networking technologies this book maybe over your head. For experienced Engineers and Administrators, the book is a must have for your desk reference.

Thomas Villarubia
CCNA CCNP