1-11 IS-IS ConfigurationWhen configuring IS-IS, go to these sections for information you are interested in:z IS-IS Overviewz IS-IS Configuration Task Listz Configuring IS-IS Basic Functionsz Configuring IS-IS Routing Information Controlz Tuning and Optimizing IS-IS Networksz Configuring IS-IS Authenticationz Configuring System ID to Host Name Mappingsz Configuring IS-IS GRz Enabling the Logging of Neighbor State Changesz Enabling IS-IS SNMP Trapz Binding an IS-IS Process with MIBsz Configuring BFD for IS-ISz Displaying and Maintaining IS-ISz IS-IS Configuration ExampleThe term “router” in this document refers to a router in a generic sense or an Ethernet switch runningrouting protocols.IS-IS OverviewIntermediate System-to-Intermediate System (IS-IS) is a dynamic routing protocol designed by theInternational Organization for Standardization (ISO) to operate on the connectionless network protocol(CLNP).The IS-IS routing protocol was modified and extended in RFC 1195 by the International Engineer TaskForce (IETF) for application in both TCP/IP and OSI reference models, and the new one is calledIntegrated IS-IS or Dual IS-IS.IS-IS is an Interior Gateway Protocol (IGP) used within an Autonomous System. It adopts the ShortestPath First (SPF) algorithm for route calculation.Basic ConceptsIS-IS terminologyz Intermediate system (IS). An IS, similar to a router in TCP/IP, is the basic unit in IS-IS to generateand propagate routing information. In the following text, an IS refers to a router.
