>> In a distributed fabric, where is the traditional control plane run? >> Say I've got 100 BGP sessions of upstream,peer, and downstream across >> ten routers. Is each pizza box grinding this out on its own, or is the >> work done on the x86 box mentioned in the larger installations? > > one way to think of it is that each pizza box (customer facing ports) > recognizes control plane messages (e.g. port 179) and "punts" them to > the control plane box, aka routing engine.
fwiw, that is pretty much what line cards on a big-box fabric do, punt to the RE. randy
