I experienced a similar problem with kamailio and packet fragmentation on a
Fedora 17 (32bit with its stock kernel) and kamailio 4.0.1:
Some mobile softphones(I think it was Zoiper or CSipSimple on Androids)
were configured to negotiate a whole lot of codecs which made the invites
have a huge sdp that made the packet too big. Normally OS should deal with
it but the calls were not going through. I am sorry I dont have more
details, I just told the user to use 2-3 codecs and problem was solved.
Maybe kamailio has some kind of upper limit buffer equal to the MTU? I am
not familiar with so low leveled details though.
Bill.
On Fri, Oct 25, 2013 at 9:58 AM, Daniel-Constantin Mierla <miconda(a)gmail.com
wrote:
Hello,
On 10/25/13 2:45 AM, Gus Monti wrote:
Hi,****
There are often times where key packets are missing from homer traces.
This seems to be caused by packet fragmentation. It is most readily
evidenced by the trace showing an Invite entering the SBC from the outside
and then no invite on the inside being seen but the 100 trying is seen on
both sides.****
Any Idea why?****
can you look at the traffic on the network (e.g., with ngrep)? Maybe you
haven't set the flag for storing the outgoing requests. Fragmentation is a
matter of OS and if you run a recent Linux based distro, this should be no
problem.
Cheers,
Daniel
--
Daniel-Constantin Mierla -
http://www.asipto.comhttp://twitter.com/#!/miconda -
http://www.linkedin.com/in/miconda
Kamailio Advanced Trainings - Berlin, Nov 25-28; Miami, Nov 18-20, 2013
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