Hi NG,
I am currently replacing the combination of an FWSM and ACE-30 out of a Catalyst 6500 chassis with a bunch of F5 AFM/LTM's.
Now, by history of the company the current implementation looks similar to this Layer 2 configuration of ACEs.
The FWSM are serving as Gateway, the same subnet / IP range is spread over two Vlan ID's, the client facing Vlan ID or "shared vlan" and the server facing vlan ID which extends out of the 6500 chassis.
The VIP address lives on the ACE-30's while the rServers are located in the Server facing Vlans.
Existing:
