Hello,

first: 5.2.5 is really old by now and not maintained, it is not easy anymore to get proper answers for questions related to it. You should upgrade to a recent release.

Kamailio has nothing to do with defragmentation of incoming UDP packets, it is the kernel/ip stack doing it. If it is done, then Kamailio received the entire UDP message.

You should run with debug=3 and see if Kamailio prints log messages related to processing the SIP request. If not, then Kamailio didn't receive it, either because it was not forwarded by kernel/ip stack or kamailio is busy doing something else (which should be somehow visbile from the log messages or run 'kamctl trap' to get the gdb backtraces for all kamailio processes and look into the stored file).

Cheers,
Daniel

Hello all,

 

Lately I faced an issue that Kamailio is not responding to some invite packets coming from SBC. When investigating I found that these packets exceeds MTU size.

Could this be the issue? Knowing that in Kamailio configuration I have a condition on is_method("INVITE"). Could be that in case of packet exceeding MTU size it’s not considered as invite packet by Kamailio?

 

I have Kamailio 5.2.5.

 

Regards,

Ali Taher

 

 

__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions
  * sr-users@lists.kamailio.org
Important: keep the mailing list in the recipients, do not reply only to the sender!
Edit mailing list options or unsubscribe:
  * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda