I'm using dlg_set_property(ka-src) and dlg_set_property(ka-dst) to keep alive my clients. In case of a network change the client does a Re-Invite with the new contact address and kamailio does keep-alives to the new address properly as the fix reported here:

The problem happens when the Re-Invite transaction on the client side is not complete and kamailio happens to send an OPTIONS keep-alive at that same time, the client fails to send back a 200 OK, because the client itself is trying to gain access on the new network. 

So as a work-around I thought would it be possible to end the dialog on missing at least 3 responses and not killing the dialog if one response is missed. Can it be a configurable parameter in the dialog module or something on those lines. Just a suggestion !!

Thanks.

- Jayesh