Cisco IOS software is the internetworking brain for Cisco switches and routers. Releases are consistantly evolving, being modified and enhanced, and this creates multiple versions that are viable. Different releases contain different features to accomodate the level of complexity of the various networks. A Engineers chooses the correct version by number and types of routers or switches in his network, the nature of business that is performed over the network, and the applications the network is supporting. They have difficulty in choosing the correct IOS version because there are so many and the naming conventions are complex. This book is the ultimate guide to determine how to optimize migration to new IOS releases. This book provides background on the evolution of IOS and explains the logical structure of its naming conventions. Detailed table indicate the features, uses migration paths, strengths, for each release so that you can choose the perfect release for your network.

Amazon.com® Reader Reviews (Ranked by Helpfulness)

Average Amazon.com® Rating:  Based on 3 Ratings

Indispensable to net admin! - 2000-04-02
Reviewer Rating:
Excellent! This book is full of answers that I have been trying to get for the longest time. Maybe the title should have been " demystifying Cisco IOS Software Releases." Indispensable to net admin. The detachable poster-map of IOS Releases helps me quickly identify the correct software release for my implementation. In several occasions I have already referred to the appendixes which contain the IOS feature set and image naming format, and the IOS product numbering scheme.

A Must Have for Cisco Wizards - 2000-06-21
Reviewer Rating:
You must have known that Cisco has a lot varieties of Cisco IOS. Yet do anyone know what 11.2(T) and 11.2 differs ? I bet you dont' know much. This book unleashed all the cisco IOS revisions and their details. So you'll never puzzled out of 'hey what's is on this version'.

Good luck, buy it, CHeap and save time and efforts.

Making it easier to understand the IOS and routers. - 2001-10-04
Reviewer Rating:
Most of the time when a book claims to be a complete reference there is quite a lot of information left out. However in this case the information is complete and covers all the releases of the Cisco IOS from Version 9 to 12.

Only 350 pages, but don't be fooled, what is inside is a vast amount of reference information that will help in understanding how the release are built and what changes have been made, as well as what releases work with what routers and switches.

The 3 part breakdown of the book start in part 1 with how the IOS architecture is laid out and how the IOS has evolved over the years. Also you gain an insight into the naming conventions used with the IOS as well.

In part 2 this is where you begin to breakdown each IOS, in a table format that makes it easy to see what changes have been made, what equipment if affects. Covering Versions 9.X. 10.X, 11.0 to 11.3(2) and 12.0/12.0T to 12.0(7)XV.

In part 3, the hardware and IOS section, coverage of basic router and switch functions takes place. Using the ROM monitor and router architecture is also looked at. This book provides and excellent reference by showing you how the router functions and what takes place during the operation.

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