The following describes the behavior on the 7750 SR, 7450 ESS, and 7950 XRS with respect to VLAN tag handling for VXLAN VPLS services:
Dot1q, QinQ, and null SAPs, as well as regular VLAN handling procedures at the WAN side, are supported on VXLAN VPLS services.
No ‟vc-type vlan” like VXLAN VNI bindings are supported. Therefore, at the egress of the VXLAN network port, the router does not add any inner VLAN tag on top of the VXLAN encapsulation, and at the ingress network port, the router ignores any VLAN tag received and considers it as part of the payload.