Cisco Cisco IOS Software Release 12.0(22)S

This document describes the Fast ReRoute (FRR) enhancements, including Node Protection, in 
Cisco IOS Release 12.0(22)S. Node Protection can be viewed as a superset of (that is, an 
enhancement to) FRR Link Protection. The document includes the following sections:

If you plan to use or already use MPLS Traffic Engineering Fast ReRoute Link Protection before 
Release 12.0(22)S, contact Cisco TAC Support for important deployment and upgrade information. 

Fast ReRoute (FRR) is a mechanism for protecting MPLS Traffic Engineering (TE) label-switched paths 
(LSPs) from link and node failures by locally repairing the LSPs at the point of failure, allowing data to 
continue to flow on them while their headend routers attempt to establish new end-to-end LSPs to replace 
them. FRR locally repairs the protected LSPs by rerouting them over backup tunnels that bypass failed 
links or nodes.

12.0(10)ST

Fast ReRoute Link Protection feature was introduced.

12.0(16)ST

Link Protection for Cisco Series 7200 and 7500 platforms was added.

12.0(22)S

Fast ReRoute

 

enhancements were added.