Cisco ASR 9000 Series

CHAPTER 6
Implementing IS-IS
Integrated Intermediate System-to-Intermediate System (IS-IS), Internet Protocol Version 4 (IPv4), is a
standards-based Interior Gateway Protocol (IGP). The Cisco software 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 how to implement IS-IS (IPv4 and IPv6) on your Cisco IOS XR network.
Currently, only default VRF is supported. VPNv4, VPNv6 and VPN routing and forwarding (VRF) address
families, L3VPN and Multicast will be supported in a future release.
Note
•
Prerequisites for Implementing IS-IS, page 341
•
Restrictions for Implementing IS-IS, page 341
•
Information About Implementing IS-IS , page 342
•
Configuration Examples for Implementing IS-IS , page 394
•
Where to Go Next, page 402
•
Additional References, page 402
Prerequisites for Implementing IS-IS
You must be in a user group associated with a task group that includes the proper task IDs. The command
reference guides include the task IDs required for each command. If you suspect user group assignment is
preventing you from using a command, contact your AAA administrator for assistance.
Restrictions for Implementing IS-IS
When multiple instances of IS-IS are being run, an interface can be associated with only one instance (process).
Instances may not share an interface.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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