When I was installing resilient pairs of Cisco ASA5510s
PMSL!
No doubt, after drinking the koolaid, not realising that on route to you the first stop-off this pair made was probably an NSA clearing house for the installation of backdoors.
Not only a poor choice of device riddled with bugs, but also contrary to popular belief amongst the Cisco fraternity Information Secuirty has never ended at Layer 3.