Ipsec to asa 5545x drops every few minutes

[catdsnny]

Old setup: Dell Optiplex GX280 running pfsense 2.1.

Was exhausting the RAM which was causing performance problems.  So I moved to:

Dell T710 (running vmware) with pfsense 2.2.2 (running as a VM)

I did a backup of the 2.1 and restored to the 2.2.2

I have an ipsec tunnel to an ASA 5545x which has been flawless for over a year on the old hardware/software.  After the move/upgrade the tunnel drops every 5 minutes.  ASA is reporting that pfsense is dropping its SA due to DPD timeout.  DPD is not enabled on either side of the tunnel.

EDIT: old system was 32 bit, new system is 64 bit

[r4z13l]

Can you post debugging logs of both sides?