ASA5505 EasyVPN client fails to detect broken VPN tunnel

[saiiven07]

Hey guys,

I have a bunch of ASA5505s that act as EasyVPN clients and running ASA 7.2(4). My problem is that some of them have an unreliable Internet connection that is, there are some minor interruptions in service. After those interruptions, I find them (ASAs) in the following state: the IPsec tunnel doesn't work (no traffic goes through the VPN tunnel), but the state of the tunnel is AM_ACTIVE. In order to make it work again, I have to disable "EasyVPN client" on the ASA and then re-enable it again. I've been trying to find a solution to this problem, but didn't succeed. Looks like there's no way to enable Dead Peer Detection on an ASA 5505, and you can't schedule to execute a script or issue a command either. If someone has any suggestions or thoughts on how to solve this problem, your help will be greatly appreciated.

[JORGE RODRIGUEZ]

DPD is enabled by default  unless it has been disabled, perhaps  you may want to check your tunnel  groups to ensure this is not the case and look into other causes .

http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a00807e0aca.shtml#Solution4

http://www.cisco.com/en/US/docs/security/asa/asa72/command/reference/i3_72.html#wp1732140