I've now upgraded to 2.2.5 and the IPSEC logging seems to work slightly differently.
To stop all of the DPD traffic logging I've had to set the following Logging Levels in IPSEC Advanced settings to Audit from the default of Control:
IPSEC SA
Networking
Message Encoding
Also, the settings are now preserved between re-boots.
Is there anyway to get the IPSEC logging to show [P1 Description] (like pre 2.2) as this would make reading the log a lot easier?
Regards
Peter