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 ExtremeXOS and Switch Engine 31.7 Feature License Requirements 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