Thanks Daniel. We did check the Hepic capture server using tcpdump and confirmed the Hepic audio reports are arriving.
On Fri, Jul 3, 2020 at 3:36 AM Daniel-Constantin Mierla <[email protected]> wrote: > Hello, > > if the packets are sent out from Kamailio, check to see in hepic server if > they arrive. > > The modules in Kamailio do not control the MTU or the UDP fragmentation, > the only options are in the core. > > Cheers, > Daniel > On 01.07.20 21:48, Andrew Chen wrote: > > Hi all, > > 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. > > During my investigation, this is what I have found out so far: > > - Putting MTU back to 9001 removes this condition where no MOS was > generated. > - 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: > > 3:48:55.895505 IP (tos 0x68, ttl 64, id 38049, offset 0, flags [+], proto > UDP (17), length 1500) > 206.81.181.40.5060 > 10.225.88.239.9063: SIP > 13:48:55.896451 IP (tos 0x68, ttl 64, id 38050, offset 0, flags [+], proto > UDP (17), length 1500) > 206.81.181.40.5060 > 10.225.88.239.9063: SIP > > - Hepic support also caused by using 1500 MTU on the interface. > - I tried using the following core parameters to see if they could remedy > this issue but didn't seem to work: > > ## MTU related core settings > > udp4_raw=-1 > > udp4_raw_mtu=1500 > > > I can't seem to find any parameters in the siptrace module that controls > fragmentation of the packets to Hepic. > > Any suggestions on how else to troubleshoot this? > > Thanks. > > -- > Andy Chen > Sr. Telephony Lead Engineer > achen@ <[email protected]>fuze.com > > > *Confidentiality Notice: The information contained in this e-mail and any > attachments may be confidential. If you are not an intended recipient, you > are hereby notified that any dissemination, distribution or copying of this > e-mail is strictly prohibited. If you have received this e-mail in error, > please notify the sender and permanently delete the e-mail and any > attachments immediately. You should not retain, copy or use this e-mail or > any attachment for any purpose, nor disclose all or any part of the > contents to any other person. Thank you.* > > _______________________________________________ > Kamailio (SER) - Users Mailing > [email protected]https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > > -- > Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- > www.linkedin.com/in/miconda > Funding: https://www.paypal.me/dcmierla > > -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <[email protected]>fuze.com -- *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*
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