Cisco router to ASA. Interesting traffic from router will not bring up tunnel. Packet tracker from ASA will bring up tunnel. Basic Phase 1 and Phase 2 configurations match. Router needs to be the side that brings up tunnel. Here is syslog from ASA when router tries. “May 14 01:02:16 odc-gw %ASA-7-710006: ESP request discarded from 6x.x.x.x to outside:2x.x.x.x.” When ASA tries Phase 2 completes and router can then access ASA’s network. ASA portions of config supplied if requested.
I have this problem too.