- Paperback: 231 pages
- Publisher: O'Reilly Media; 1st edition (January 2002)
- Language: English
- ISBN-10: 0596002750
- ISBN-13: 978-0596002756
- Product Dimensions: 7 x 0.7 x 9.2 inches
- Shipping Weight: 14.1 ounces (View shipping rates and policies)
- Average Customer Review: 14 customer reviews
- Amazon Best Sellers Rank: #109,592 in Books (See Top 100 in Books)
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IP Routing 1st Edition
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You've seen the bumper stickers: "If Mama ain't happy, ain't nobody happy." Simply put, Internet Protocol (IP) connectivity is the mama of nearly everything that goes on in information technology. If it's not working right, pretty much nothing else will be working right. IP Routing helps you understand how packets get from one IP address (on one network) to another (on a separate network). This is what the Internet--not to mention all medium-sized and large corporate intranets--is all about. If you're a router technician, you need to understand what's in these pages. That's especially true if you use Cisco Systems equipment. Ravi Malhotra spends time on standard protocols that are used by all router makers, but he devotes significant space to Interior Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP), which are Cisco proprietary. He shows how to do configuration work in Cisco Internetwork Operating System (IOS) exclusively.
In attacking each of the protocols he covers, Malhotra divides his exposition into several parts. First, he explains how to get the protocol running--he provides IOS listings that show how to bring it up on an example network (which he illustrates graphically). He then explains how the protocol assigns metrics to routes, and how it goes about evaluating metrics and choosing routes on the fly (this includes a look at the protocol's routing table structure). There's also coverage of any special features (such as virtual links under Open Shortest Path First--OSPF) and of troubleshooting strategies. Throughout, the author writes clearly, making effective use of graphics and realistic examples. --David Wall
Topics covered: Protocols for finding efficient routes between Internet Protocol (IP) addresses, as those protocols are implemented by Cisco routers. Covered protocols include both versions of Routing Information Protocol (RIP and RIP-2), Interior Gateway Routing Protocol (IGRP), Enhanced IGRP (EIGRP), Open Shortest Path First (OSPF), and Border Gateway Protocol 4 (BGP-4).
"A useful book for those in the networking field or those wishing to migrate between protocols." Raza Rizvi, News@UKUUG, October 2002
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Unfortunately, "IP Routing" does not measure up to my expectations. The author clearly knows his subject, but he writes as you'd expect a knowledgeable person to write who wasn't paying close attention to the difference between discussion and exposition: the writing is sloppy, details are frequently missing, and no care is taken to define and adhere to consistent terminology. Additionally, the book is (admittedly) Cisco-centric and does not clearly separate the structure and function of the routing protocols from the details of the protocols on Cisco routers.
OTOH, the book is usable as an introduction to various routing protocols.
This book does have grammatical errors, and has several typos. This is unfortunate, but not unimportant. It's not a romance novel, and shouldn't "turn you off".
So, you're frustrated about learning router languages? Well, most routers use routing languages similar to Cisco's. Even UNIX/Linux machines have scripts similar to Cisco's command-line. And did you expect to read a book about IP "routing" without talking about routers? To do IP routing, you configure the routers individually. IP Routing is how you setup up the protocols and configurations of each router. What were you expecting? A book about making your internet connection faster by cutting out some code?
"Multi-homing to different ISPs also creates problems with this schema. Uncle-Q has the address block 18.104.22.168/24 from ISP-X but he also connects to ISP-Z. ISP-Z would have to carry Brother-X's specific route 22.214.171.124/24. In other words, since ISP-Z advertises Brother-X's prefix, the routing tables in the attached ASs would see both the aggregate 126.96.36.199/16 from ISP-X and 188.8.131.52 from ISP-A."
What's hard to understand? You're experienced enough to have a preference for BGP, but you don't understand this? It's all subnets and gateways. If you like studying BGP, you must at least understand a little bit of it, right? Then how can you not understand this paragraph about three gateways running BGP? You should be able to make your own picture. Here's a picture: Draw a circle (ISP-Z) with a line to ISP-A (another circle). There's your picture. Maybe the author just assumed a two-node diagram was sufficient and the reader had a little imagination and/or common sense.
Each protocol is described in terms of how it is used in routing, what header fields they contain, and what its best uses are. There are also numerous examples in each chapter that further illustrate what role each protocol plays in routing data from one hop to the next. Any system administrator wishing to know more about the inticacies of Internet routing should pick up this book.
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