Chapter 1. IS-IS Fundamentals

Intermediate System to Intermediate System (IS-IS) is a link state routing protocol which has long been used by telephone network operators and various other public utilities, such as power companies, and has recently surged in popularity, particularly among Internet Service Providers (ISPs). Information about IS-IS, however, is not easy to come by—many people wonder how IS-IS works and what all those strange addresses mean.

We've written this book to demystify IS-IS for a broad range of engineers and networking neophytes just beginning to work with the protocol. When you have finished reading this book, you should know enough about the protocol to successfully deploy an IS-IS network. If you're a developer looking ...

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