If the ASBRs and the local leaf are connected by a route reflector, the BGP add-path command must be enabled on the route reflector for mcast-vpn-ipv4 and mcast-vpn-ipv6, or for label-ipv4 if Option C is used. The add-path command forces the route reflector to advertise all ASBRs to the local leaf as the next hop for the actual root.
If the add-path command is not enabled for the route reflector, only a single ASBR is advertised to the local root, and ASBR MoFRR is not available.