BGP fast reroute is optional on the 7210 SAS. Use the bgp backup-path command to enable the feature.
On the 7210 SAS, the backup-path command is supported only for label-IPv4 routes.
In the base router context, the backup-path command is used to control fast reroute on a per-RIB basis (labeled IPv4 routes). When the command specifies a particular family, BGP attempts to find a backup path for every prefix learned by the associated BGP RIB.
The backup path is the best path after the primary path and any paths using the same BGP next hop as the primary path have been removed.