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RC-83
Cisco IOS XR Routing Configuration Guide
Implementing IS-IS on Cisco IOS XR Software
Integrated Intermediate System-to-Intermediate System (IS-IS), Internet Protocol Version 4 (IPv4), is a
standards-based Interior Gateway Protocol (IGP).
Cisco IOS XR implements the IP routing capabilities described in International Organization for
Standardization (ISO)/International Engineering Consortium (IEC) 10589 and RFC 1995, and adds the
standard extensions for single topology and multitopology IS-IS for IP Version 6 (IPv6).
This module describes the new and revised tasks you need to implement IS-IS (IPv4 and IPv6) on your
Cisco IOS XR network.
Note For more information about IS-IS on the Cisco IOS XR software and complete descriptions of the IS-IS
commands listed in this module, you can refer to the “Related Documents” section of this module. To
locate documentation for other commands that might appear while of executing a configuration task,
search online in the Cisco IOS XR software master command index.
Feature History for Implementing IS-IS on Cisco IOS XR Software
Contents
• Prerequisites for Implementing IS-IS on Cisco IOS XR Software, page RC-84
• Restrictions for Implementing IS-IS on Cisco IOS XR Software, page RC-84
• Information About Implementing IS-IS on Cisco IOS XR Software, page RC-84
• How to Implement IS-IS on Cisco IOS XR Software, page RC-91
• Configuration Examples for Implementing IS-IS on Cisco IOS XR Software, page RC-122
• Where to Go Next, page RC-124
• Additional References, page RC-124
Release Modification
Release 2.0 This feature was introduced on the Cisco CRS-1.
Release 3.0 No modification.
Release 3.2 Support was added for the Cisco XR 12000 Series Router. The ability to
configure a broadcast medium connecting two networking devices as a
point-to-point link was added.
Release 3.2.2 Support was added for the multicast-intact feature.