Sanjay, Thanks for your quick response. I would also like to know if registrar should create separate binding when user registers with different ports but coming from same IP.
To explain this better -- if a user has two machine A and B behind same NAT and tries to register say user "abc" from both the machine A and B; then from the server side it receives Registration request from same IP but different ports. Should there be two separate binding in this case? Thanks, Santosh -----Original Message----- From: Sanjay Sinha (sanjsinh) [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 07, 2006 1:39 PM To: Prasad, Santosh; sip-implementors@cs.columbia.edu Subject: RE: [Sip-implementors] Adding Bindings rfc3261 sec10.2.1 I think registrar should create a separate binding when user register with a different ip address/port combination. >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of >Prasad, Santosh >Sent: Tuesday, November 07, 2006 12:12 PM >To: sip-implementors@cs.columbia.edu >Subject: [Sip-implementors] Adding Bindings rfc3261 sec10.2.1 > >WRT RFC 3261 sec 10.2.1 Adding Bindings > > > >My question is should the SIP Registrar create two bindings in >the database for Registration with same user-id but different >IP Port combination (IP being in the same subnet or NAT )? >This is not scenario for forking at multiple AOR. > > > >The following flow describes an issue whereby calls made to a >user that had been logged out from one Machine (IP:Port) as >he/she logged in from a different Machine (IP:Port) fails. >Please see the steps below: > >Machine A and B are behind same NAT device > >Machine A points to Proxy 1 say EP01 > >Machine B points to Proxy 2 say EP02 > > >At time t0 - User 'abc' logs into SIP server (EP01) from Machine 'A'. > >At time t1 - User 'abc' logs into SIP server (EP02 )from Machine 'B'. >At time t2 - The Presence server realizes that this user 'abc' >is logged in at another location, so the Presence server >indicates user 'abc' on Machine 'A' to logout informing him >that he is logged in at another location and the client also >will log user out of SIP server. > >At time t3 - user 'def' tries to call user 'abc', the call >request fails. > > > >This is what I see in DB > > > >At time t0 there is an entry [EMAIL PROTECTED]:PortA > >At time t1 the entry gets updated with [EMAIL PROTECTED]:PortB --> There >should be two bindings as this is a new Registration from >different IP:Port but (IP being in the same subnet)? > >At time t2 there is a request from Machine A to logout >(De-Register) [EMAIL PROTECTED]:PortA but the SIP Registrar removes [EMAIL >PROTECTED]:PortB > >I see from the logs that the application doesn't create new >binding or entry in DB when the User 'abc' logs from Machine >'B' (at time t1) it overrides the old IP port. So at time >instance t2 there is no entry in the database > > > >But the client is logged in on Machine B and can originate the >call but cannot receive any calls. > > > > > >Thanks for your time. > > > >Regards, > >Santosh Prasad > > > >_______________________________________________ >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
