Cisco Cisco IOS Software Release 12.2(33)SRE

 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a 
specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. 
Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images 
support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to 

. An account on Cisco.com is not required.

 lists only the Cisco IOS software release that introduced support for a given feature in a given 

Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS 
software release train also support that feature.

RSVP Fast Local Repair

12.2(33)SRB

The RSVP Fast Local Repair feature provides quick 
adaptation to routing changes without the overhead of the 
refresh period to guarantee QoS for data flows. With FLR, 
RSVP speeds up its response to routing changes from 30 
seconds to a few seconds.