I've setup two outside interfaces on an ASA 5520, wired them up to two FA ports on a 2800 series router. Setup EIGRP on the router and ASA.
[This was done to test and see if I wanted to setup a second IPSEC tunnel could it be done on a single outside interface or two outside interfaces.]
Digressing, I get an Eigrp host cannot be found message on the router and ASA referring to their upstream IP addresses respectively.
Why does EIGRP have a hard time with two connections between two layer 3 devices?