Francois Audet writes: > I think the point is that some proxies WANT to know. They want to use > the keep-alive to keep tract of the availability of the UA without > waiting for a request to fail.
then we are talking about a different application than keeping tcp NAT binding alive. was scope of christer's draft to define a general purpose "is UA alive" detection protocol? i don't think that existing UA implementations that support CRLF send them if they are not behind NAT. if proxy wants to know if UA is still alive or not, then we need to mandate CRLF keepalive for all UAs whether behind NAT or not. in my opinion this would be a quite fundamental addition to sip UA behavior. but even in that case the proxy could measure the interval between the first two CRLFs and thus auto-detect it. -- juha _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
