Route reflectors allow IBGP to scale better. IBGP requires a full mesh between peers. IBGP routers peer with the route reflectors in order to receive route updates--instead of peering with every other IBGP router within the AS.
Stacking the 3750's will provide you with a single switch block. This doesn't necesarily constitute redundancy from your host's perspective if your host is connected to only one of these switches.Redundancy is achieved by connecting each host inter...