I have a site to site VPN between a ASA 5520 and a 2801. The connection has been setup for many
years and I have never had any problems.
However over the last few days the VPN Tunnel resets every 60 Secs causing a small "reconnection pause"
between subnets. This happens even with a constant ping from both ends causing a "Request Timed Out"
The IKE Rekey is set to 28800, the idle Timeout is 30 Mins and the IPsec Rekey is 3600 secs.
I have tried deleting and recreating the tunnel and its stills drops and restarts every 60 secs.
Other tunnels stay up without any problems.
I'm guessing it's a mismatch in a ACL but wondered if there was a easier way to find out which one.
Can some give me a few areas to check.
Thank you in advance.