With a 3-tiered server farm, including routed access and distribution layers, I have 2 questions:
1.) Would I still be able to deploy network services, such as server load balancing, inter-vlan firewalling, ssl offloading, etc, at the distro layer? In other words, would the L3 isolation provided by the routed access layer preempt the possibility of deploying those services at the distribution layer? It seems to me that the answer is yes -- it would preempt, but please give a detailed explanation as to why not.
2.) Deploying those services would only makes sense at the distribution layer, correct? Correct me if Im wrong, but given the limitations of a routed access layer, such as the inability to span a vlan across a switch cluster, plus given the fact that you want those services appliances/modules to span across the data center and support all server farm switch clusters in the first place, the answer to me is that they must be deployed at the routed distribution layer (probably with a SWITCHED access layer....going back to question 1).
I welcome and appreciate everyone's input, but this really sounds like a Jon Marshall set of questions! :-)