Thanks Srinivas for reply. Is there any specification which restricts to send REGISTER with expires=0 before receiving final response of REGISTER with expires>0?
Also, what if first REGISTER(With Expires>0) reaches to the network and after that DUT sending REGISTER with expires=0? Regards, Parveen On Wed, Jun 28, 2017 at 11:04 AM, Banda, Srinivas (Srinivas) < sriba...@avaya.com> wrote: > What if the Previous REGISTER(expires > 0) lost in the network, and the > REGISTER with expires = 0 might reach the REGISTRAR first in this case > REGISTRAR will not find the active registration, so end up with 4xx > response. > > Regards > Srinivas > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu [mailto: > sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Parveen > Aggarwal > Sent: Wednesday, June 28, 2017 10:41 AM > To: sip-implementors@lists.cs.columbia.edu > Subject: [Sip-implementors] Sending deRegister request just after sending > REGISTER request > > Dear Expert, > > Is it valid to send deRegister request i.e. REGISTER with expires=0 before > receiving final response for previous registration request i.e. REGISTER > with expires >0 ? > > As per RFC 3261, > It is mentioned for new REGISTER request only > > UAs MUST NOT send a new registration (that is, containing new Contact > header field values, as opposed to a retransmission) until they have > received a final response from the registrar for the previous one or > the previous REGISTER request has timed out. > > > Thanks, > > Parveen > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists. > cs.columbia.edu_mailman_listinfo_sip-2Dimplementors&d=DwICAg&c= > BFpWQw8bsuKpl1SgiZH64Q&r=DfcjuTVsKgmJaaUkoM6ILHncIUfFzD1YvkhqXoTJ3oE&m= > GfL4qOD1hrOoOz-iubTqqxkfDYYxZfSjZbnYyPbrRKA&s= > Yley5vwhmX2fXslDVs3mS3hSp9ddYoA20hhRBMh-WB8&e= > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
