This is more a design question. We're thinking about changing our campus core from layer 2 to layer 3. What are the advantages to running a routing protocol over a point to point link instead of a VLAN interface? I've read that point-to-point links provide the fastest convergence for routing protocols.
My understanding to this point is when p2p links drop all routes and neighbors associated with that link are dropped. With a VLAN interface the underlying protocol has no way of signaling to the routing protocol that interface state changed. With this design OSPF timers are responsible for killing OSPF session. During this period traffic is black holed.
Is this right? I guess I'm really looking for validation...