The Cisco implementation of IS-IS provides numerous configuration options for enabling various IS-IS capabilities and modifying protocol parameters both globally and on a per-interface basis. This section presents some of these configuration options, such as advertising default routes, route summarization, and enabling authentication. Route leaking and IS-IS multi-area support are features recently introduced into the Cisco IS-IS implementation. The essence of these features and basic configurations are discussed briefly.
For a current and more complete list of IS-IS configuration options available in the Cisco IOS Software, see the Cisco Configuration Guide at www.cisco.com.