IS-IS

Note

The IS-IS feature is supported only at and above the license level listed for this feature in the license tables in the Switch Engine v33.1.1 Licensing Guide document.

This chapter introduces IS-IS, a link state protocol that distributes routing information between routers belonging to an autonomous system. It provides configuration commands and examples and information about configuring, displaying, and managing IS-IS on a network. This chapter assumes that you are already familiar with Intermediate System-Intermediate System (IS‑IS) and IP routing.

If not, refer to the following publications for additional information:

• RFC 1195—Use of OSI IS-IS for Routing in TCP/IP and Dual Environments
• RFC 2763—Dynamic Hostname Exchange Mechanism for IS-IS
• RFC 2966—Domain-Wide Prefix Distribution with Two-Level IS-IS
• RFC 2973—IS-IS Mesh Groups
• RFC 3373—Three-Way Handshaking for IS-IS Point-to-Point Adjacencies
• RFC 3719—Recommendations for Interoperable Networks using Intermediate System to Intermediate System (IS-IS)
• RFC 3787—Recommendations for Interoperable IP Networks using Intermediate System to Intermediate System (IS-IS)
• draft-ieft-isis-ipv6-06—Routing IPv6 with IS-IS
• draft-ietf-isis-restart-02—Restart signaling for IS-IS
• draft-ietf-isis-wg-multi-topology-11—Multi-topology (MT) routing in IS-IS
• ISO 10589—OSI IS-IS Intra-Domain Routing Protocol (also available as RFC 1142)
• Interconnections: Bridges and Routers by Radia Perlman, ISBN 0-201-56332-0, Published by Addison-Wesley Publishing Company