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Inside Cisco IOS Software Architecture (CCIE Professional Development) Paperback – 28 Jul 2000

4.0 out of 5 stars 2 customer reviews

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Product details

  • Paperback: 240 pages
  • Publisher: Cisco Press; 1 edition (28 July 2000)
  • Language: English
  • ISBN-10: 1587058162
  • ISBN-13: 978-1587058165
  • Product Dimensions: 18.3 x 1.8 x 22.9 cm
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (2 customer reviews)
  • Amazon Bestsellers Rank: 2,282,950 in Books (See Top 100 in Books)
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Product description

From the Back Cover

An essential guide to understanding the Cisco IOS architecture

In-depth coverage of Cisco's IOS Software architecture provides crucial information to:

  • Prevent network problems and optimize performance through more efficient design and configuration
  • Isolate and resolve network problems more quickly and easily
  • Apply the appropriate packet switching method, such as process switching, fast switching, optimum switching, or Cisco Express Forwarding (CEF)
  • Understand the hardware architecture, packet buffering, and packet switching processes for shared memory routers (Cisco 1600, 2500, 3600, 4000, 4500, and 4700 series)
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco 7200 series routers
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco 7500 series routers
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco GSR 12000 series routers
  • Further your knowledge of how IOS Software implements Quality of Service (QoS)

Inside Cisco IOS Software Architecture offers crucial and hard-to-find information on Cisco's Internetwork Operating System (IOS) Software. IOS Software provides the means by which networking professionals configure and manage Cisco networking devices. Beyond understanding the Cisco IOS command set, comprehending what happens inside Cisco routers will help you as a network designer or engineer to perform your job more effectively. By understanding the internal operations of IOS Software, you will be able to take architectural considerations into account when designing networks and isolate problems more easily when troubleshooting networks. Inside Cisco IOS Software Architecture provides essential information on the internal aspects of IOS Software at this level, and it is an invaluable resource for better understanding the intricacies of IOS Software and how it affects your network.

Inide Cisco IOS Software Architecture begins with an overview of operating system concepts and the IOS Software infrastructure, including processes, memory management, CPU scheduling, packet buffers, and device drivers, as well as a discussion of packet switching architecture with detailed coverage of the various platform-independent switching methods, including process switching, fast switching, optimum switching, and Cisco Express Forwarding (CEF). The book then delves into the intricate details of the design and operation of platform-specific features, including the 1600, 2500, 4x00, 3600, 7200, 7500, and GSR Cisco routers. Finally, an overview of IOS Quality of Service (QoS) is provided, including descriptions of several QoS methods, such as priority queuing, custom queuing, weighted fair queuing, and modified deficit round robin.

About the Author

Curtis Murphy, CCIE #1521, is an engineer in Cisco's Serviceability Design Department in Research Triangle Park, specializing in IOS software products. He has worked in the networking industry since 1989 and at Cisco since 1994. While at Cisco, he has worked both as an IBM protocols specialist in the Technical Assistance Center and as a software engineer in IOS Software Development for mid-range and high-end routers.

Russ White, CCIE #2635, is a member of the IOS Network Protocols Deployment and Scalability Team at Cisco, where he is involved in the design and implementation of routing protocols and scalable network design.

Vijay Bollapragada, CCIE #1606, is currently a manager in the Solution Engineering team at Cisco, where he works on new world network solutions and resolves complex software and hardware problems with Cisco equipment. Vijay also teaches Cisco engineers and customers several courses, including Cisco Router Architecture, IP Multicast, Internet Quality of Service, and Internet Routing Architectures. He is also an adjunct professor in Duke University's electrical engineering department.

Customer Reviews

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Top Customer Reviews

Format: Hardcover
A book of quality rather than quantity. This book contains some interesting information on Cisco router processes and internal packet flows. However, in the main the majority of information, excluding the GSR and CEF overviews, have been presented before at Cisco Networker/CCIE seminars. I was hoping for more detail, which unfortunately the book was lacking. i.e. The book does not really detail how to performance tune a Cisco router, and the more importantly the functionality of the various processes. Admittedly, one can guess what various processes do, but it is disappointing when text has always been available for UNIX and other operating systems. To me this book does not provide access to new (previously un-disclosed) information.
In saying all of this, the book is still a great piece of reference material.
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By A Customer on 23 Oct. 2001
Format: Hardcover
This book provides an excellent description of the intrinsics of Cisco IOS, the various router platforms, and IOS switching methods.
The same information could probably be gathered from numerous Networkers presentations and similar, but here you've got it all.
The final chapter on QoS seems kinda misplaced, and not up to the same standards as the rest of the book.
I wish they'd make a similar book on the Catalyst switches.
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Most Helpful Customer Reviews on (beta) (May include reviews from Early Reviewer Rewards Program) 4.6 out of 5 stars 14 reviews
2 of 2 people found the following review helpful
5.0 out of 5 stars Great Book! 24 Feb. 2013
By Jace - Published on
Format: Paperback Verified Purchase
Even though this book was written some time ago, it is still very useful in 2013. Why? CEF and Fast-Switching are still in all production networks. Almost all platforms still utilize particle buffers, interface buffers, public buffers, etc. The processes, memory and CPU scheduling has not changed much. If you want to be able to critically analyze your Cisco platforms with a firm understanding of the internal workings within the router, this is a fantastic book. Perhaps the greatest part of the book was the end - it ties everything together with applied QoS. The need for QoS becomes so apparent, since the operation of the router is no longer a mystery.

After readings this book, you will be competent in the understanding of the operation of the Cisco router...what happens when a packet arrives, where does it get stored, how does it get processed and WHY does this matter? (solutions) I am currently studying for the CCIE, and besides this being a fantastic book to add to you arsenal of Cisco tools, it can be a much needed change of reading material from the typical routing or switching protocols you have probably been reading enough about.

I paid $8.00 for this "used". I feel like I robbed Cisco Press and the authors.
2 of 3 people found the following review helpful
4.0 out of 5 stars Very Good Information - You need this. 30 Jun. 2003
By Billye Moore - Published on
Format: Hardcover Verified Purchase
I was looking for this information to supplement the information provided in the support exam documentation and the performance field guide from MG Hill, and online docs. This book has great information but does need to have a different name as I thought this would be more geared toward how the IOS was actually programmed and give a better understanding of IOS versions.
If you troubleshoot networks this is part of the magic bullet needed to help in understanding memory and memory pool allocation, IOS Resource Management, processes, CPU, buffers, and cache. The book spends quite a bit of time on large scale routers and needs to give a bit more focus on smaller scale equipement, also the information on Netflow is only 5 pages long
5.0 out of 5 stars internal mechanism of IOS 25 Jan. 2014
By Harrison - Published on
Format: Paperback Verified Purchase
tell me about the internal mechanism of IOS, then understand background of each configuration command; a great help to me.
5.0 out of 5 stars Deepens your understanding 7 April 2001
By Keith Tokash - Published on
Format: Hardcover
I bought this book and read it cover to cover in about two weeks (which for me is pretty good). It's definitely not for beginners, in fact it really benefits people who are running BFRs like 7200 and bigger. Good detail about 7500 and 12000 architectures.
It also gave me a lot of little bits of knowledge that made sense but I hadn't thought about before. Example - if you have a 7206 stacked with fast ethernet cards but your only using half of them, IOS is allocating buffer space to every interface anyway, so pull those cards.
Other topics are queuing methods like weighted RED and a very coherent discussion of process/fast/CEF/distributed switching.
Pricey book but I thought it was worth it.
5.0 out of 5 stars A brilliant tour of the Internals !! 6 Feb. 2001
By A Customer - Published on
Format: Hardcover
I have just completed reading this book and I must say - it was a brilliant handling of a tricky subject like the "Internals" of an operating system.Must for anyone wanting to know what happens 'inside' that router of yours.
I felt the authors could have spent a little more time on the Cisco 12000 GSR section.
Though only 200 odd pages - its "packed" with stuff and it would take you a week to run through the book once.The first chapter is a killer - you will take time over it - so dont fret if your spending a lot of time there !!
Splendid effort !! When's the follow up expected ???
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