All BGP-EVPN (control plane for a VXLAN DC), BGP-AD (control plane for MPLS-based spoke SDPs connected to the WAN), and one site for BGP multi-homing (control plane for the multi-homed connection to the WAN) can be configured in one service in a specified system. If that is the case, the following considerations apply:
The configured BGP route-distinguisher and route-target are used by BGP for the two families, that is, evpn and l2vpn. If different import/export route targets are to be used per family, vsi-import/export policies must be used.
The pw-template-binding command under BGP, does not have any effect on evpn or bgp-mh. It is only used for the instantiation of the BGP-AD spoke SDPs.
If the same import/export route-targets are used in the two redundant DGWs, VXLAN binding as well as a fec129 spoke SDP binding is established between the two DGWs, creating a loop. To avoid creating a loop, the router allows the establishment of an EVPN VXLAN binding and an SDP binding to the same far-end, but the SDP binding is kept operationally down. Only the VXLAN binding is operationally up.