Chris- If you configure ISAKMP keepalives, it helps prevent sporadically dropped LAN-to-LAN or Remote Access VPN, which includes VPN clients, tunnels and the tunnels that are dropped after a period of inactivity. This feature lets the tunnel endpoint monitor the continued presence of a remote peer and report its own presence to that peer. If the peer becomes unresponsive, the endpoint removes the connection. In order for ISAKMP keepalives to work, both VPN endpoints must support them. *Cisco PIX/ASA 7.x and later, for the tunnel group named 10.165.205.222 securityappliance(config)#tunnel-group 10.165.205.222 ipsec-attributes securityappliance(config-tunnel-ipsec)#isakmp keepalive threshold 15 retry 10 http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a00807e0aca.shtml Hope that helps.
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