We are currently in the process of implementing a Nortel IPT solution into a greenfield site. The switching infrastructure will all be Cisco - 4500's in the access-layer and 6500's collapsed distribution/core.
I am thinking of running layer 3 from the access-layer for fast convergence, equal cost load balancing. This is new for us as all our existing designs use layer 2 from access-layer but none of them have VOIP.
I am interested on any views on this and any pros or cons to this approach.