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Hello,<br>
<br>
the incoming ACK has the top Route with lr parameter, meaning is
loose routing. By that, the proxy removes the top route header,
preserves the R-URI and sends to the URI in the next Route header.<br>
<br>
From what I can see in the Route stack, it seems a spiral back to
the proxy because ip 81.21.38.34 is two times there.<br>
<br>
If you can't sort it out, send the full SIP trace taken on the proxy
from the initial INVITE to the ACK. Then we can see how Record-Route
headers are set and the signaling flow.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 6/6/13 3:30 PM, phillman25 wrote:<br>
</div>
<blockquote
cite="mid:CAEprJzJHoCV2qL80o7vuFaMaQDCufh=s2tR8gs=cEQZuf-g0Pw@mail.gmail.com"
type="cite">
<div dir="ltr">Dear list further to the above problem i observed
the following:
<div><br>
</div>
<div style="">ACK message coming from PABX1:</div>
<div style=""><br>
</div>
<div style="">
<div>U +0.001877 <a moz-do-not-send="true"
href="http://192.168.10.189:5060">192.168.10.189:5060</a>
-> <a moz-do-not-send="true"
href="http://81.21.38.34:5060">81.21.38.34:5060</a></div>
<div>ACK <a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.55">sip:94294294@81.21.38.55</a>
SIP/2.0*</div>
<div>Via: SIP/2.0/UDP
192.168.10.189:5060;branch=z9hG4bK76f8f103;rport*</div>
<div>Route:
<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as181922af;did=c83.f641"><sip:81.21.38.34;lr=on;ftag=as181922af;did=c83.f641></a>,<<a
moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.5">sip:94294294@81.21.38.5</a>;pgw-call=call-2aa6>,<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as181922af"><sip:81.21.38.34;lr=on;ftag=as181922af></a>*</div>
<div>Max-Forwards: 70*</div>
<div>From: "22498045" <<a moz-do-not-send="true"
href="mailto:sip%3A22498045@192.168.10.189">sip:22498045@192.168.10.189</a>>;tag=as181922af*</div>
<div>To: <<a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.34">sip:94294294@81.21.38.34</a>>;tag=3d95248-37261551-13c4-50022-1c3096-5cc2673d-1c3096*</div>
<div>Contact: <<a moz-do-not-send="true"
href="http://sip:22498045@192.168.10.189:5060">sip:22498045@192.168.10.189:5060</a>>*</div>
<div>Call-ID:
<a class="moz-txt-link-abbreviated" href="mailto:696cfa577f42395767bc812e7e8a38a5@192.168.10.189:5060*">696cfa577f42395767bc812e7e8a38a5@192.168.10.189:5060*</a></div>
<div>CSeq: 102 ACK*</div>
<div>User-Agent: FPBX-2.8.1(1.8.21.0)*</div>
<div>Content-Length: 0*</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div style="">ACK message sent to PGW from Kamailio1</div>
<div style=""><br>
</div>
<div style="">
<div>U +0.001254 <a moz-do-not-send="true"
href="http://81.21.38.34:5060">81.21.38.34:5060</a>
-> <a moz-do-not-send="true"
href="http://81.21.38.5:5060">81.21.38.5:5060</a></div>
<div>ACK <a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.55">sip:94294294@81.21.38.55</a>
SIP/2.0*</div>
<div>Via: SIP/2.0/UDP
81.21.38.34;branch=z9hG4bKc526.9402c2edbc3ef96d9e405408364506a9.0*</div>
<div>Via: SIP/2.0/UDP
192.168.10.189:5060;branch=z9hG4bK76f8f103;rport=5060*</div>
<div>Route: <<a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.5">sip:94294294@81.21.38.5</a>;pgw-call=call-2aa6>,<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as181922af"><sip:81.21.38.34;lr=on;ftag=as181922af></a>*</div>
<div>Max-Forwards: 16*</div>
<div>From: "22498045" <<a moz-do-not-send="true"
href="mailto:sip%3A22498045@192.168.10.189">sip:22498045@192.168.10.189</a>>;tag=as181922af*</div>
<div>To: <<a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.34">sip:94294294@81.21.38.34</a>>;tag=3d95248-37261551-13c4-50022-1c3096-5cc2673d-1c3096*</div>
<div>Contact: <<a moz-do-not-send="true"
href="http://sip:22498045@192.168.10.189:5060">sip:22498045@192.168.10.189:5060</a>>*</div>
<div>Call-ID:
<a class="moz-txt-link-abbreviated" href="mailto:696cfa577f42395767bc812e7e8a38a5@192.168.10.189:5060*">696cfa577f42395767bc812e7e8a38a5@192.168.10.189:5060*</a></div>
<div>CSeq: 102 ACK*</div>
<div>User-Agent: FPBX-2.8.1(1.8.21.0)*</div>
<div>Content-Length: 0*</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<br>
</div>
<div style="">Shouldn't the ACK message to the PGW have the
header ACK <a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.5">sip:94294294@81.21.38.5</a>;pgw-call=call-2aa6
and the Route:
<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as181922af"><sip:81.21.38.34;lr=on;ftag=as181922af></a>* ???</div>
<div style=""><br>
</div>
<div style=""><br>
</div>
<div style=""><br>
</div>
<div style=""><br>
</div>
<div style="">Your help is much appreciated!!</div>
<div style=""><br>
</div>
<div style="">Phillip</div>
</div>
<div style=""><br>
</div>
</div>
</div>
<div class="gmail_extra">
<br>
<br>
<div class="gmail_quote">On Thu, Jun 6, 2013 at 12:26 PM,
phillman25 <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:phillman25@gmail.com" target="_blank">phillman25@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Dear List
<div><br>
</div>
<div>I upgraded from Kamailio v 3.3 to 4.0.1 and am now
facing an issue for the below scenario:</div>
<div><br>
</div>
<div>PABX1 ==> Kamailio1 ==> Cisco PGW ==>
Kamailio1 ==> PABX2<br>
</div>
<div>
<div><br>
</div>
<div><br>
</div>
<div>I understand that this is a hairpin scenario but
was working normally on v 3.3.</div>
<div><br>
</div>
<div>Checking in the syslog i see:</div>
<div>ERROR: <core> [receive.c:230]: ERROR:
receive_msg: no via found in reply<br>
</div>
</div>
<div><br>
</div>
<div>Checking the sip trace i see that when calling from
PABX1 to PABX2. After PABX2 answers and the the 200 OK
is eventually sent to PABX1 , PABX1 answers with ACK
but seems like its not sent back to PABX2 as a result
PABX resends a 200 OK and the cycle continues until
PABX2 sends a BYE message. Please see below the ACK
received from PABX1:</div>
<div><br>
</div>
<div><font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="#336600">ACK <a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.55"
target="_blank">sip:94294294@81.21.38.55</a> SIP/2.0</font><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Via</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
SIP/2.0/UDP
192.168.10.189:5060;branch=z9hG4bK6bffe37c;rport</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Route</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as1cd4f8f1;did=e36.c471"><sip:81.21.38.34;lr=on;ftag=as1cd4f8f1;did=e36.c471></a>,<<a
moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.5"
target="_blank">sip:94294294@81.21.38.5</a>;pgw-call=call-26eb>,<a class="moz-txt-link-rfc2396E" href="sip:81.21.38.34;lr=on;ftag=as1cd4f8f1"><sip:81.21.38.34;lr=on;ftag=as1cd4f8f1></a></span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Max-Forwards</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
70</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">From</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
"22498045" <<a moz-do-not-send="true"
href="mailto:sip%3A22498045@192.168.10.189"
target="_blank">sip:22498045@192.168.10.189</a>>;tag=as1cd4f8f1</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">To</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
<<a moz-do-not-send="true"
href="mailto:sip%3A94294294@81.21.38.34"
target="_blank">sip:94294294@81.21.38.34</a>>;tag=3d94f08-37261551-13c4-50022-1c1e67-87fe958-1c1e67</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Contact</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
<<a moz-do-not-send="true"
href="http://sip:22498045@192.168.10.189:5060"
target="_blank">sip:22498045@192.168.10.189:5060</a>></span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Call-ID</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
<a moz-do-not-send="true"
href="http://03042a717e27a87e759f7f4879e70377@192.168.10.189:5060"
target="_blank">03042a717e27a87e759f7f4879e70377@192.168.10.189:5060</a></span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">CSeq</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
102 ACK</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">User-Agent</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
FPBX-2.8.1(1.8.21.0)</span><br
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">
<font
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"
color="red">Content-Length</font><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">:
0</span><br>
</div>
<div>
<span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"><br>
</span></div>
<div><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px"><br>
</span></div>
<div><span
style="font-family:Arial,Verdana,sans-serif;font-size:11.818181991577148px">Is
there an issue with the above ACK message? Is there
any way to solve this issue quickly perhaps by
disabling loose route?</span></div>
<div><font face="Arial, Verdana, sans-serif"><span
style="font-size:12px">I have observed that this
issue occurs only when hairpinned. </span></font></div>
<div><br>
</div>
<div><br>
</div>
<div>Thanking you in advance!</div>
<div><br>
</div>
<div>Phillip</div>
<div><br>
</div>
</div>
</blockquote>
</div>
<br>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>
<a class="moz-txt-link-freetext" href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Kamailio Advanced Training, San Francisco, USA - June 24-27, 2013
* <a class="moz-txt-link-freetext" href="http://asipto.com/u/katu">http://asipto.com/u/katu</a> *</pre>
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