A label-IPv4 is automatically added as a BGP tunnel entry to the tunnel table if all of the following conditions are met.
The label-IPv4 route is the best BGP path for the /32 IPv4 prefix.
The label-IPv4 route has the numerically lowest preference value among all routes (regardless of the protocol) for the /32 IPv4 prefix.
The disable-route-table-install command does not apply to the route.
The selective-label-ipv4-install command does not prevent the installation of the route.
If multipath and ECMP are configured so that they apply to label IPv4 routes, then a BGP tunnel can be installed in the tunnel table with multiple ECMP next-hops, each one corresponding to a path through a different BGP next-hop. The multipath selection process described in BGP route installation in the route table also applies to this case.