I have configured the Site to site vpn between 2 ASA 5520 firewalls say site A and Site B. The problem is that.
If site A initiate the traffic, it brings the VPn up and both sites can communicate with each other.If site A stop the traffic then after 5 minutes if site B sends the traffic it dropped unless the site A sends the traffic. even one packet from site A allow the site B to communicate. This is a very strange problem never encountered before. your help in this case would be helpfull for me.