信谊metric IRB

信谊metric IRB involves routing and bridging on both ingress and egress VTEPs. Thus ensuring that bidirectional traffic is tagged with same L3VNI, indicating routing operation to be performed on the egress VTEP. Ingress VTEP routes the traffic between the source subnet and destination subnet, in a VRF (Virtual Routing and Forwarding), and sends the packet to the egress VTEP, encapsulated with L3VNI. Both ingress and egress VTEPs have the VRF mapped to the same L3VNI. The egress VTEP, routes the packet to, the destination subnet in the VRF (mapped to Layer3-VNI).

信谊metric IRB is an optimal solution in a large-scale network, as VTEPs can be selectively configured as gateway for the subnets present on the directly connected hosts.