IKE Phase 1 is re-negotiated every 2 hours on Edge devices
When DAIP Edge negotiates Phase 1 with the VPN Gateway, we are getting its proposal to work with community timeout, but afterward, in packet #6 we send notification that timeout should be changed to RA properties.
You can see the following inside 6th packet of IKE Phase 1:
Next Payload: NONE
Length: 00 28 (40)
DOI: 00 00 00 01 (1)
SPI Size: 16
Notify Type: 24576 (RESPONDER-LIFETIME)