The following list identifies considerations and restrictions that apply to virtual NNI links on boundary nodes:
Function on boundary nodes only.
Support only a CLIP (loopback) interface configured on the GRT.
Support only one CLIP (loopback) interface.
Do not support Bidirectional Forwarding Detection (BFD). You cannot enable BFD on a logical interface for a virtual NNI link.
Cannot coexist with VXLAN Gateway. You cannot enable VXLAN Gateway on a loopback interface for a virtual NNI link and you cannot create a loopback interface for a virtual NNI link when VXLAN Gateway is enabled.