Hi, >This is addressed in RFC 4320, which also suggests normative >updates to RFC 3261. >I did not understand the question about Cancel for non-Invite >transaction, is that allowed or useful?
I am not aware of any text explicitly saying it's not allowed. And, people can do things no matter whether it's useful or not :) Regards, Christer > >-----Original Message----- > >From: [EMAIL PROTECTED] > >[mailto:[EMAIL PROTECTED] On Behalf > Of Christer > >Holmberg (JO/LMF) > >Sent: Monday, June 04, 2007 8:54 AM > >To: [EMAIL PROTECTED]; sip-implementors@cs.columbia.edu > >Subject: Re: [Sip-implementors] 100 response for non-INVITE requests > > > > > >Hi Dale, > > > >I can't speak for others, but I have never heard about crashes due > >receiving 100 Trying responses to non-INVITE requests. > > > >One question, however, is whether 100 Trying responses for > non-INVITE > >requests have any impact on the re-transmission. > > > >Another question is what happens if terminals, after receiving 100 > >Trying for non-INVITE requests, start to send CANCEL... > > > >Regards, > > > >Christer > > > > > >> -----Original Message----- > >> From: [EMAIL PROTECTED] > >> [mailto:[EMAIL PROTECTED] On Behalf Of > >> [EMAIL PROTECTED] > >> Sent: 4. kesäkuuta 2007 4:19 > >> To: sip-implementors@cs.columbia.edu > >> Subject: [Sip-implementors] 100 response for non-INVITE requests > >> > >> We're noticing that when the SIP network gets congested, > phones will > >> be fairly frantic about resending requests that they do > not receive > >> (provisional or final) responses for. > >> Unfortunately, this only increases the load on the proxy, > which does > >> not help the situation. > >> For INVITEs, the proxy sends 100 responses to stop the phone from > >> resending (and to keep it from failing over to another > proxy). But > >> for non-INVITE requests, 100 responses are SHOULD NOT. > >> > >> However, we're considering adjusting the proxy so that if it > >receives > >> a resend of a non-INVITE request (on a non-reliable transport), it > >> will send a 100 response to (hopefully) quench the resends. > >> > >> 1) Will phones respond to 100 responses to non-INVITE requests to > >> quench resends? > >> > >> 2) Will SIP agents behave badly if they receive 100 responses to > >> non-INVITE requests? > >> > >> Dale > >> _______________________________________________ > >> Sip-implementors mailing list > >> Sip-implementors@cs.columbia.edu > >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > >> > > > >_______________________________________________ > >Sip-implementors mailing list > >Sip-implementors@cs.columbia.edu > >https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
