I have a need for out-of-the-box setup.
I need my ASA5520 and Cisco 2821 router to peer via HSRP.
The ASA5520 should always be ACTIVE and processing ALL traffic unless the ASA5520 is down (determined via IP SLA, BOOLEAN logic) and then the router becomes the active peer.
Anytime the HSRP peer router is active, the router should forward traffic to the backup site.
The backup site will have the same setup as primary so both site can be active/active full time.
Asymetric routing issue will not be an issue in this specific case but thanks for thinking about this issue too.
FYI, I have pasted this in firewalling fourm too.