We have 2 PIX 535 connecting in failover mode. It was running fine for last 5-6 days. Now primary firewall is hanging and loosing connectivity from network. It starts well and allow login on console screen, but post 4-5 mins console screen hangs and the firewall looses connectivity from network. However all modules and interfaces status are ok (green). On the other end secondary firewall is running fine. Software version was 7.0 earlier but now it has been upgraded to 7.2 but still the problem is same. Pls suggest.