<div dir="ltr">Thanks Daniel.<div><br></div><div>We did check the Hepic capture server using tcpdump and confirmed the Hepic audio reports are arriving.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 3, 2020 at 3:36 AM Daniel-Constantin Mierla <<a href="mailto:miconda@gmail.com">miconda@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<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>On 01.07.20 21:48, Andrew Chen wrote:<br>
</div>
<blockquote type="cite">
<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 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 style="font-variant-ligatures:no-common-ligatures">## MTU
related core settings</span></p>
<p 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 style="font-variant-ligatures:no-common-ligatures">udp4_raw=</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(202,51,35)">-1</span></p>
<p 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 style="font-variant-ligatures:no-common-ligatures">udp4_raw_mtu=</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(202,51,35)">1500</span></p>
<p 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">
<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">achen@</a><a href="http://fuze.com" target="_blank">fuze.com</a></div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
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<fieldset></fieldset>
<pre>_______________________________________________
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</pre>
</blockquote>
<pre cols="72">--
Daniel-Constantin Mierla -- <a href="http://www.asipto.com" target="_blank">www.asipto.com</a>
<a href="http://www.twitter.com/miconda" target="_blank">www.twitter.com/miconda</a> -- <a href="http://www.linkedin.com/in/miconda" target="_blank">www.linkedin.com/in/miconda</a>
Funding: <a href="https://www.paypal.me/dcmierla" target="_blank">https://www.paypal.me/dcmierla</a></pre>
</div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><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>415 516 5535 (M)</div><div><a href="mailto:achen@thinkingphones.com" target="_blank">achen@</a><a href="http://fuze.com" target="_blank">fuze.com</a></div><div><br></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>