I have a hub-spoke vpn solution, using ASA with software 8.0(3).
I have installed the last spoke, an ASA5505 like all others, but the tunnel does not come up!
Using debug I can get this message:
Dec 17 01:56:04 [IKEv1]: IP = X.X.X.X, Duplicate Phase 1 packet detected. Retransmitting last packet.
All spoke are ASA5505 with the same configuration for isakmp and IPSec.