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Hi, <br>
<br>
I suppose calling set_forward_no_connect() at the LB for a request
from the registrar to a user will lead to the result. LB won't try
to make an outgoing tcp/tls connection to reach a requested
destination and will only forward a request only via existing one.<br>
<br>
BR<br>
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<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Thanks
for your explanation, the problem is that the actual lookup
is done by a proxy which is located after our load balancer.
Therefore, the TCP connection with the UA should not be
visible by the proxy but by the load balancer.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">How
does that work in such case?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR">
sr-users [<a class="moz-txt-link-freetext" href="mailto:sr-users-bounces@lists.sip-router.org">mailto:sr-users-bounces@lists.sip-router.org</a>]
<b>On Behalf Of </b>Vitaliy Aleksandrov<br>
<b>Sent:</b> Wednesday, May 06, 2015 10:34 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><br>
<b>Subject:</b> Re: [SR-Users] Recommended configuration
for TCP support<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b>set_forward_no_connect()</b>
called after lookup() prevents kamailio from making a new
connection to a phone if there is no active connection. <br>
This is useful when you are trying to call to a UA which
kamailio still keeps registration record for, but TCP/TLS
connect to this phone is already gone (due to timeout, network
problem, etc...).<o:p></o:p></p>
<div>
<p class="MsoNormal">On 05/05/15 14:54, Mickael Marrache
wrote:<o:p></o:p></p>
</div>
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<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">In
general, it happens in our network (as more and more Via
headers are added).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Sorry,
I didn't understand your last sentence. What do you mean
by not connect if there is no active connection after
location lookup?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR">
sr-users [<a moz-do-not-send="true"
href="mailto:sr-users-bounces@lists.sip-router.org">mailto:sr-users-bounces@lists.sip-router.org</a>]
<b>On Behalf Of </b>Daniel-Constantin Mierla<br>
<b>Sent:</b> Monday, May 04, 2015 11:07 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List<br>
<b>Subject:</b> Re: [SR-Users] Recommended
configuration for TCP support</span><o:p></o:p></p>
</div>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hello,<br>
<br>
where are typically those issues with truncated SDP? On the
phones?<br>
<br>
If you use tcp and have phones behind the nat, it is
recommended to not connect if there is no active connection
after location lookup -- see core functions for tcp.<br>
<br>
Cheers,<br>
Daniel<o:p></o:p></p>
<div>
<p class="MsoNormal">On 04/05/15 13:54, Mickael Marrache
wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US">Hi,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">We sometimes get
issues caused by truncated SDP bodies. Therefore, we are
looking at using TCP instead of UDP.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">What is the
recommended configuration when TCP is used?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Currently, I only
have the following:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">children=16</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">listen=udp:<ip>:5060</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">listen=tcp:<ip>:5060</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">disable_tcp=no</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">tcp_connection_lifetime=605
(registration expiry is 600)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Also, is there a
difference with UDP regarding NAT handling?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Mickael</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><br>
<br>
<br>
<br>
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><br>
<br>
<br>
</span><o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>Daniel-Constantin Mierla<o:p></o:p></pre>
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<br>
<br>
<o:p></o:p></span></p>
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