Inter-subnet traffic uses the same L3 VNI mapping model in both directions between VTEPs. Which routing model is that?
Select an answer to reveal the explanation.
Short Explanation
Symmetric means both doors use the same keying — L3 VNI/VRF encapsulation matches each way. Asymmetric is the mix-and-match model where ingress routes and egress may just bridge. Same map both directions = symmetric IRB.
Full Explanation
Symmetric inter-VNI routing encapsulates with a consistent L3 VNI (VRF) model in both directions so each VTEP routes similarly. Asymmetric IRB typically routes at ingress toward a remote MAC over the L2 VNI while the egress bridges. CRB forbidding L3 VNIs entirely and underlay multicast without EVPN host routing are different concepts.