We are having site-to-site vpn between US (Cisco ASA-5510) and india (netscreen).
Recently we have changed the ISP.
Therefore, we have changed the peer end IP after that we have upgraded the US end ASA from 7.2(3) to 8.0(4).
After this upgradation, we are facing every 4 plus hours the tunnel is going down and we have to refresh the tunnel afterwards it is coming up. We have not faced this issue when we are having image 7.2(3).
We checked by changing the lifetime at both the side but no luck.
On Cisco ASA,we have terminated 6 tunnel but for other tunnel we are not having any problem.
Could somebody suggest?