Words in brackets that are separated by bars are used when indicating that there are multiple choices of commands. For example, when configuring VTP you can enable the trunk port to choose one mode: on, off, desirable, or auto mode. This will be shown like this: [onoffdesirableauto].

Knowledge of what configuration mode you are in and how to enter each configuration mode on the Cisco Command Line Interface is important. Knowing what each mode configures will aid you in using the proper configuration mode. The Set/Clear command−based IOS CLI uses similar command modes as the Cisco CLI used on Cisco routers and switches, but uses mainly the enable, set, show, and clear commands. Chapter 1 will cover the different CLI command modes.

The Black Book Philosophy

Written by experienced professionals, Coriolis Black Books provide immediate solutions to global programming and administrative challenges, helping you complete specific tasks, especially critical ones that are not well documented in other books. The Black Book’s unique two−part chapter format—thorough technical overviews followed by practical immediate solutions—is structured to help you use your knowledge, solve problems, and quickly master complex technical issues to become an expert. By breaking down complex topics into easily manageable components, this format helps you quickly find what you’re looking for, with commands, jump tables, and step−by−step configurations located in the Immediate Solutions section.

I welcome your feedback on this book. You can either email The Coriolis Group at ctp@coriolis.com or email me directly at sodom@rcsis.com. Errata, updates, information on classes I teach, and more are available at my Web site: http://www.thequestforcertification.com/.

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Cisco Systems RJ-45-to-AUX manual Black Book Philosophy