In the Multi-Site scenario of a CloudFabric solution, what are the correct items in the following description of Layer 2 interoperability?
A.
In the mapped VNI mode, the Fabric GW at both ends uses BGP EVPN to negotiate a mapped VNI, and all packets sent to the peer end are routed using the mapped VNI VXLAN packing
B.
In practice, different sites have their own independent VNI space, so VXLAN tunnels inside different sites are likely to use different VNI C. Layer 2 interconnection is supported in two modes: local VNI and mapped VNI
C.
In local VNI mode, the local VNI of the local Fabric GW is used as the outbound VXLAN packet to encapsulate VXLAN packets to the VNI
Resolution: Option A is correct, the mapped VNI is the VNI used for communication between data centers . Option B is correct, multi-site uses the segment vxlan interconnect scheme, so the fabric gw will terminate the DC or Fabric , so the DC can have its own independent VNI space. Option C is correct, local VNI mode and mapped VNI mode are the two modes currently supported by L2 interworking, but some models of switches do not support local VNI mode, this needs to refer to the switch manual. The D option is wrong, in local vni mode, the fabric gw outbound direction is encapsulated with the other party's vni as the outbound direction .
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