<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hello,</p>
<p>if the packets are sent out from Kamailio, check to see in hepic
server if they arrive.</p>
<p>The modules in Kamailio do not control the MTU or the UDP
fragmentation, the only options are in the core.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 01.07.20 21:48, Andrew Chen wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEytwJ0w3QfjPcq7encNSGysGEa4twAOWGCYX=R=1oaO0KM+og@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi all,
<div><br>
</div>
<div>I've been assigned a task to investigate why hepic doesn't
generate MOS scores ever since we changed the kamailio
interface MTU from 9001 -> 1500.</div>
<div><br>
</div>
<div>During my investigation, this is what I have found out so
far:</div>
<div><br>
</div>
<div>- Putting MTU back to 9001 removes this condition where no
MOS was generated.</div>
<div>- I did a tcpdump of port 9063 which is the port used to
send data to Hepic capture server and saw it reports packets
are fragmented:</div>
<div><br>
</div>
<div><span
style="color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)">3:48:55.895505
IP (tos 0x68, ttl 64, id 38049, offset 0, flags [+], proto
UDP (17), length 1500)</span><br
style="box-sizing:inherit;color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)">
<span
style="color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)"> 206.81.181.40.5060
> 10.225.88.239.9063: SIP</span><br
style="box-sizing:inherit;color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)">
<span
style="color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)">13:48:55.896451
IP (tos 0x68, ttl 64, id 38050, offset 0, flags [+], proto
UDP (17), length 1500)</span><br
style="box-sizing:inherit;color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)">
<span
style="color:rgb(209,210,211);font-family:Slack-Lato,appleLogo,sans-serif;font-size:15px;font-variant-ligatures:common-ligatures;background-color:rgb(34,37,41)"> 206.81.181.40.5060
> 10.225.88.239.9063: SIP</span><br>
</div>
<div><br>
</div>
<div>- Hepic support also caused by using 1500 MTU on the
interface.</div>
<div>- I tried using the following core parameters to see if
they could remedy this issue but didn't seem to work:</div>
<div><br>
</div>
<div>
<p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(86,32,244)"><span
class="gmail-s1"
style="font-variant-ligatures:no-common-ligatures">## MTU
related core settings</span></p>
<p class="gmail-p2"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
class="gmail-s1"
style="font-variant-ligatures:no-common-ligatures">udp4_raw=</span><span
class="gmail-s2"
style="font-variant-ligatures:no-common-ligatures;color:rgb(202,51,35)">-1</span></p>
<p class="gmail-p2"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
class="gmail-s1"
style="font-variant-ligatures:no-common-ligatures">udp4_raw_mtu=</span><span
class="gmail-s2"
style="font-variant-ligatures:no-common-ligatures;color:rgb(202,51,35)">1500</span></p>
<p class="gmail-p2"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><br>
</p>
</div>
<div>I can't seem to find any parameters in the siptrace module
that controls fragmentation of the packets to Hepic.</div>
<div><br>
</div>
<div>Any suggestions on how else to troubleshoot this?</div>
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div>-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr" style="font-size:12.8px">Andy Chen</div>
<div dir="ltr" style="font-size:12.8px">
<div>Sr. Telephony Lead Engineer</div>
<div><a href="mailto:achen@thinkingphones.com"
target="_blank" moz-do-not-send="true">achen@</a><a
href="http://fuze.com" target="_blank"
moz-do-not-send="true">fuze.com</a></div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">*Confidentiality
Notice: The information contained in this e-mail and any</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">attachments
may be confidential. If you are not an intended recipient, you</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">are
hereby notified that any dissemination, distribution or copying
of this</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">e-mail
is strictly prohibited. If you have received this e-mail in
error,</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">please
notify the sender and permanently delete the e-mail and any</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">attachments
immediately. You should not retain, copy or use this e-mail or</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">any
attachment for any purpose, nor disclose all or any part of the</span><br
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">
<span
style="color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)">contents
to any other person. Thank you.*</span>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a>
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
</body>
</html>