find when ICA Citrix session disconnect of F5

Hi, I have a question about F5,Xenapp and the session reliability. I need to find the exact moment (with discard of 5 seconds) when the ICA sessions, connected through the F5 (SSL offload), go to disconnected and the session reliability comes in operation. I tried to find this information with the "show sys connection" command on the F5 shell but the connection remain on "established" also if the client lost the internet connection, and the idle time of this connection not go over the 2 seconds. Maybe there are some mechanisms to keep the connections alive.

Thanks for all

Stefano.