VXLAN Unicast - Multiple VTEPs and Site B can see A, and Site C can see A, but sites B and C can't see each toehr.

Hi All,

My goal here is to create a stretched L2 VLAN across three VTEPs.

In my main site, let's call it Site A, I have an ASR-1001-X on my left hand side, let's call it Site B, I have another ASR-1001-X, and on my right hand side, I have Site C, which is a Nexus 93240YC-FX2.

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Between A and B, my VNI and VLAN mapping shows L2 adjacency between hosts, and likewise between Site A and C, I can see adjacency between hosts. However, when I attempt to ping or at least see the MAC address from Site B or C - no go.

I have Site A's ASR-X 1001 peering with site B, and C, loopbacks. L3 is there. Verified it.

I defined on the Site B's ASR, Site C's Nexus switch, and vice versa. I think this is where the issue lays.

I'm not using EVPN or any control plane at the moment, this is an 'ingress replication' unicast configured VXLAN fabric.

Anyone experience this "partitioning" before?