L2TP tunnel issues


I have many sites configured with l2tp tunnel over some Mikrotik. Randomly, most of the time at night, the tunnel will still be connected but no traffic will pass through, so the phones will go down.

At first I tought it was the router but since 2 sites connected in the same PBX with 2 different tunnel last night, I think it’s the l2tp daemon proably who is having issues.

anyone could help?