Tunnel works for a while then the tunnel stops. The 3 rd party device log says
SA xxxxxx not found. once we bounce the tunnel , it again started working
Offhand, that suggests your IKE Phase 1/2 timers don't match on both sides.
You will need to check this.
that matches. Checking DPD configuration options on both end. as other side has DPD enabled , found one sk for enabling the response checkpoint side too
Retrieving data ...