-----Urspr�ngliche Nachricht (HTML) wurde als Anlage beigef�gt.----- Von: <[EMAIL PROTECTED]> Gesendet: 01.06.05 10:49:20 An: "Markus Hofmann" <[EMAIL PROTECTED]> Betreff: RE: [Sip-implementors] loosing ACK but sending immediatly a BYE
Hi Vivek, there a three possibilities when we will send a BYE immedialty after the ACK. 1. A CANCEL fails. 2. We got two 200 OK from different UAS and want only one session. 3. Both parties was not able to negotiate a right codec. (SDP) We are using UDP and so it is possible that our ACK will be lost or the BYE will received before the ACK. Greeting Markus __________________________________________________________ Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min. weltweit telefonieren! http://freephone.web.de/?mc=021201-----Ursprüngliche Nachricht wurde als Attachment angehängt.-----
| Von: | <[EMAIL PROTECTED]>, [EMAIL PROTECTED], [email protected] |
| Gesendet: | 01.06.05 10:49:20 |
| An: | "Markus Hofmann" <[EMAIL PROTECTED]> |
| Betreff: | RE: [Sip-implementors] loosing ACK but sending immediatly a BYE |
>>> UAC keeps sending ACK's corresponding to all 200's for quenching the retrans.. but i think the problem being mentioned here is ACK not getting to the other end for some reason.. (n/w issue or something).. so going fwd. UAS exhausts the num of retrans for the 200's ... Now after this <as we have discussed> the BYE from UAC to shut off the session.
From: Ramachandran Iyer [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 01, 2005 1:59 PM
To: Vivek Srivastava (WT01 - TELECOM SOLUTIONS); [EMAIL PROTECTED]; [email protected]
Subject: RE: [Sip-implementors] loosing ACK but sending immediatly a BYE
[EMAIL PROTECTED] wrote:
Hi Markus,
If first ACK is not reaching UAS, there should be retransmission of 200OK and, in response, retransmission of ACK. If I assume that UAC is sending BYE immediately after sending ACK, then this BYE should be treated normally and UAS should end the dialog. UAS and UAC have sufficient information to handle BYE.>>> Thats rite..
I have a question. Why UAC is sending BYE? If it is not user initiated activity then, there should be multiple transmission of 200Ok. And suppose UAS is retransmitting 200Ok which are not being delivered to UAC, then chances of successful delivery of ACK are very less.>>> UAC keeps sending ACK's corresponding to all 200's for quenching the retrans.. but i think the problem being mentioned here is ACK not getting to the other end for some reason.. (n/w issue or something).. so going fwd. UAS exhausts the num of retrans for the 200's ... Now after this <as we have discussed> the BYE from UAC to shut off the session.
Thanks,
Vivek
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Markus Hofmann
Sent: Tuesday, May 31, 2005 1:25 PM
To: RamachandranIyer; [email protected]
Subject: Re: [Sip-implementors] loosing ACK but sending immediatly a BYE
Hi Rama,
now I'm understanding what you mean but that's not what I want to know
This is the scenario:
------ INVITE ----->
<------ 180 -------
---- CANCEL ----->
<--200 OK for INVITE ---
<-- 200 OK for CANCEL ---
--- ACK --> xxx
------ BYE ------>
<----- 200 OK ---
A CANCEL request was failed. I have a conncetion but I don't want this connection. So after the ACK I send immediatly a BYE. But the ACK is lost. What should I do now on the UAS side?
Greeting
Markus
----Urspr�ngliche Nachricht (HTML) wurde als Anlage beigef�gt.-----
Von: Ramachandran Iyer <[EMAIL PROTECTED]>
Gesendet: 31.05.05 07:02:55
An: "Markus Hofmann" <[EMAIL PROTECTED]>
Betreff: Re: [Sip-implementors] loosing ACK but sending immediatly a BYE
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