Hi, Greetings of the day!!!
Can anyone help me on this ongoing issue. Regards Sampat ----- Forwarded Message ----- From: sampat patnaik <sam_e...@yahoo.co.in> To: Rupesh Mothe <rm0063...@techmahindra.com>; "sip-implementors@lists.cs.columbia.edu" <sip-implementors@lists.cs.columbia.edu> Sent: Thursday, 19 September 2013 11:50 PM Subject: Re: [Sip-implementors] SIP ISSUE Hi Rupesh, 1)Incase that case what is expected out of source node..i.e the SBG(proxy) must be expecting an ACK message to the error 504 sent..right? 2) second query would be why not this CANCEL message is forwarded to next hop i.e destination node .should the flow mentioned below be followed: SOURCE SBG(Proxy 1) DESTINATION | | | | INVITE F1 | | |--------------->| INVITE F2 | | 100 F3 |--------------->| |<---------------| INVITE F4 | |--------------> | INVITE F5 | |--------------> | | | INVITE F6 | | --------------->| INVITE F7 ---------------> INVITE F8 ---------------> | | | | CANCEL F9 | | |--------------->| | | 200 F10 | | |<---------------| CANCEL F11 | | |--------------->| | | 200 F12 | | |<---------------| | | | | | 487 F17 | | |<---------------| | | ACK F18 | | |--------------->| | | | | | | | | | | | | | | | | 487 F19 | | |<---------------| | | ACK F20 | | |--------------->| | | | 3) i would suspect that the INVITE in F11 message(trailing mail) is becoz the cancel request is not being sensed by the SBG and is busy in resending the REINVITE message to the destination(maximum 7 invites due to timer issue of 64*T1 i.e 32secs) .Also i thing the error 504 is populated because there is time out error generated after destn server failed to respond to 7th(F11) reinvite request and is flooded to sorce side expecting an ACK before ending the entire process. 4)what would have happened had there not been that F11 invite message? Thanks in advance. Regards Sampat ________________________________ From: Rupesh Mothe <rm0063...@techmahindra.com> To: sampat patnaik <sam_e...@yahoo.co.in> Sent: Thursday, 19 September 2013 11:28 PM Subject: RE: [Sip-implementors] SIP ISSUE Hi Sampat- This is expected behaviour , 504 should get retransmitted no issues , you need to set the retransmit value in proxy to minimize the flooding Issue i am seeing here is the 11th INVITE getting transmitted from proxy , once it sent 200OK for CANCEL it should not send retransmitted INVITE any more Thanks & Regards, Rupesh Mothe | NPA | Tech Mahindra Mobile: +91 9960727012 , +233-263597627 -----Original Message----- From: sampat patnaik [mailto:sam_e...@yahoo.co.in] Sent: 19 September 2013 23:21 To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] SIP ISSUE Hi, I am currently facing an issue that as follows :..my question is why PROXY1 is unable to process the CANCEL message in this case. CASE: REMOTE NODE IS COMPLETELY DOWN and we need to understand why flooding of 504 sip error is happening towards source side while it is not responding withACK mesg SOURCE Proxy 1 REMOTE NODE | | | | INVITE F1 | | |--------------->| INVITE F2 | | 100 F3 |--------------->| |<---------------| INVITE F4 | |--------------> | INVITE F5 | |--------------> | | | INVITE F6 | | --------------->| INVITE F7 ---------------> INVITE F8 ---------------> | | | | CANCEL F9 | | |--------------->| | | 200 F10 | | |<---------------| INVITE F11 | | |--------------->| | | | | | | | 504 F19 | | |<---------------| | | 504 F20 | | |<---------------| | | 504 F21 | | |<------------- | | | | | | | | 504 message is sent 11 times from proxy to source..why this abnormal behavior? Thanks in advance Regards Sampat _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ============================================================================================================================Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at <a href="http://www.techmahindra.com/Disclaimer.html";>http://www.techmahindra.com/Disclaimer.html</a> externally and <a href="http://tim.techmahindra.com/tim/disclaimer.html";>http://tim.techmahindra.com/tim/disclaimer.html</a> internally within Tech Mahindra.============================================================================================================================ _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
