In a VPRN context, BGP fast reroute is optional and must be enabled. Fast reroute can be applied to all IPv4 prefixes, all IPv6 prefixes, all IPv4 and IPv6 prefixes, or to a specific set of IPv4 and IPv6 prefixes.
If all IP prefixes require backup path protection, use a combination of the BGP instance-level backup-path and VPRN-level enable-bgp-vpn-backup commands. The VPRN BGP backup-path command enables BGP fast reroute for all IPv4 prefixes and/or all IPv6 prefixes that have a best path through a VPRN BGP peer. The VPRN-level enable-bgp-vpn-backup command enables BGP fast reroute for all IPv4 prefixes and/or all IPv6 prefixes that have a best path through a remote PE peer.