Troubleshooting IP Routing Protocols

Chapter 10. Understanding Intermediate System-to-Intermediate System (IS-IS)

This chapter covers the following key topics:

• IS-IS protocol overview

• IS-IS protocol concepts

• IS-IS link-state database

• Configuring IS-IS for IP routing

This chapter presents the fundamental concepts behind the Intermediate System-to-Intermediate System (IS-IS) routing protocol. Specifically, the material covered is slanted toward Integrated IS-IS and its usability for routing in IP environments.

The IS-IS protocol is one of the popular Interior Gateway Protocols (IGP) used on the Internet. OSPF, which is also covered in this book, is another popular IGP. The IS-IS protocol architecture easily lends itself to adaptation for various applications. IS-IS is one ...