<html><head></head><body bgcolor="#FFFFFF"><div>Hello,</div><div><br>On 9 Nov 2012, at 16:12, Alex Solt <<a href="mailto:alex_solt@hotmail.com">alex_solt@hotmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
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Hi,<br><br>To be accurate the next hop after kamailio is a session border controller and not an end-point. And the SBC is the one which get confused with the ACT received from kamailio. <br>Is sys_branch=0 shoudl be used within WITHINDLG block?<br></div></div></blockquote><div><br></div>No, syn_branch is a global parameter, add it somewhere at the top of your config file.<div><br></div><div>Cheers,</div><div>Daniel</div><div><br><blockquote type="cite"><div><div dir="ltr"><br><br>Thanks,<br>AS<br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">Date: Fri, 9 Nov 2012 14:56:22 +0100<br>From: <a href="mailto:miconda@gmail.com">miconda@gmail.com</a><br>To: <a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><br>CC: <a href="mailto:alex_solt@hotmail.com">alex_solt@hotmail.com</a><br>Subject: Re: [SR-Users] "branch" tag in the "Via" header of the ACK message for the re-INVITE<br><br>
Hello,<br>
<br>
try with global parameter:<br>
<br>
syn_branch=0<br>
<br>
An end-to-end ACK is a separate transaction, as it can go directly
from caller to callee or skip some hops from the INVITE path (if no
record routing is used). So branch in Via should not be used to
match the dialog, but call-id, from-tag and to-tag. It would be also
good ask the vendor to support properly sip rfc, other sip UAs may
not have this configuration option.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="ecxmoz-cite-prefix">On 11/9/12 2:49 PM, Alex Solt wrote:<br>
</div>
<blockquote cite="mid:COL104-W2211D3AC29FBDCB9C811FB84680@phx.gbl">
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<p class="ecxMsoNormal">Hi,</p>
<p class="ecxMsoNormal"><br>
</p>
<p class="ecxMsoNormal">We have a problem with the "branch" tag in
the "Via" header of the ACK
message for the re-INVITE. The "branch" tag value is not a
unique number so the end point thinks the ACK is belong to the
previous call. This causes the active calls fail after 15 min
(right after the ACK message for re-INVITE passed by kamailio
proxy). <br>
</p>
<p class="ecxMsoNormal"><br>
</p>
<p class="ecxMsoNormal">Is there a way to set the "branch" tag in
the "Via" header of the ACK
message for the re-INVITE to be a unique number?</p>
<p class="ecxMsoNormal"><br>
</p>
<p class="ecxMsoNormal">PS1: We are running kamailio v3.3.</p>
<p class="ecxMsoNormal">PS2: we did not have this issue with the
old version of openser.<br>
</p>
<p class="ecxMsoNormal"><br>
</p>
<p class="ecxMsoNormal">Thanks,</p>
<p class="ecxMsoNormal">AS<br>
</p>
<br>
<br>
</div>
<br>
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<br>
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<br>
<pre class="ecxmoz-signature">--
Daniel-Constantin Mierla - <a class="ecxmoz-txt-link-freetext" href="http://www.asipto.com" target="_blank">http://www.asipto.com</a>
<a class="ecxmoz-txt-link-freetext" href="http://twitter.com/#%21/miconda" target="_blank">http://twitter.com/#!/miconda</a> - <a class="ecxmoz-txt-link-freetext" href="http://www.linkedin.com/in/miconda" target="_blank">http://www.linkedin.com/in/miconda</a>
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - <a class="ecxmoz-txt-link-freetext" href="http://asipto.com/u/kat" target="_blank">http://asipto.com/u/kat</a>
Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - <a class="ecxmoz-txt-link-freetext" href="http://asipto.com/u/katu" target="_blank">http://asipto.com/u/katu</a></pre></div> </div>
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