I'm implementing a data center with an Aggregation layer equiped with FWSM-1 which cannot support active/active failover.
I'm thinking about multi-context to manually divide traffic into the two CAT6500.
Any comment or suggestion ?
You did ask for comments after all :-).
You said in your initial post that you could not use active/active but what you describe in terms of failover in your scenario is active/active, see this link -
If you choose to go active/standby you cannot have FWSM1 active for one context and standby for another.