Just Like you, I thought that LISP was the answer. BUT LISP is not capable of extend a broadcast domain. VXLAN, on the other hand, can do this. AND LISP, is in fact, the control-plane but of the SD-Access, in the SDA environment, data plane is VXLAN, but generally speaking (that is, in "underlay") VXLAN is a control plane protocol, because routers and switches use the control plane to use VXLAN.
I agree, it should be A - VXLAN is a data plane technology - LISP is control plane related.
upvoted 4 times
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