Configuring the config>service>vprn>enable-bgp-vpn-backup command causes only imported BGP-VPN routes to be considered when selecting the primary and backup paths.
This command is required to support fast failover of ingress traffic from one remote PE to another remote PE.
7210 SAS platforms do not support BGP backup path commands that are used to enable consideration of multiple paths learned from CE BGP peers when selecting primary and backup paths to reach the CE.