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Cisco IOS XR Routing Configuration Guide
Implementing BGP on Cisco IOS XR Software
The Border Gateway Protocol (BGP) is an Exterior Gateway Protocol (EGP) that allows you to create
loop-free interdomain routing between autonomous systems. An autonomous system is a set of routers
under a single technical administration. Routers in an autonomous system can use multiple Interior
Gateway Protocols (IGP) to exchange routing information inside the autonomous system and an EGP to
route packets outside the autonomous system.
This module describes information that is unique to BGP for IP Version 4 (IPv4) and IP Version 6 (IPv6)
implementation in Cisco IOS XR Software.
Note For more information about BGP on the Cisco IOS XR software and complete descriptions of the BGP
commands listed in this module, you can see the “Related Documents” section of this module. To locate
documentation for other commands that might appear while executing a configuration task, search online
in the Cisco IOS XR software master command index.
Feature History for Implementing BGP on Cisco IOS XR Configuration Module
Contents
• Prerequisites for Implementing BGP on Cisco IOS XR Software, page RC-2
• Information About Implementing BGP on Cisco IOS XR Software, page RC-2
• How to Implement BGP on Cisco IOS XR Software, page RC-27
• Configuration Examples for Implementing BGP on Cisco IOS XR Software, page RC-76
• Where to Go Next, page RC-79
• Additional References, page RC-80
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.