[SR-Users] multi netwotk interface kamailio stops processing packets in one of it's network interfaces although keeps processing in the others

[Nuno Miguel Reis]

Hi Alex thanks for the feedback.
In my network scenario I have 2 internet faced interfaces where kamailio
listens on port 5060 from 2 different carriers and when the "stall" starts
in on of this interfaces (in my setup probably more than 80% of the SIP
traffic comes in through the interface that stalls) I still can do
everything on the other interface (where the remaining ~20% of the SIP
traffic is) like when for instance an extension doesn't REGISTER when the
SIP packet comes into the stalled interface, if I change the outbound proxy
on the extension endpoint to be the other public interface from the other
carrier the REGISTER comes in to kamailio and it's processed without issues.
So the kamailio path in kamailio cfg file is the same for SIP traffic in
both interfaces but for some reason starts to stall in one of them.
Any ideas on how to troubleshoot this better?

--
Nuno Miguel Reis
Departamento de Engenharia Informática
Faculdade de Ciências e Tecnologia
Universidade de Coimbra


On Wed, Sep 16, 2020 at 7:28 PM Alex Balashov <abalashov at evaristesys.com>
wrote:

> Hi Nuno,
>
> Insufficient child processes might lead to a slow-down of processing,
> but not a complete stall. It sounds like traffic coming in on one
> particular interface is leading to pathological database queries or API
> calls which do not occur for other traffic on other interfaces, perhaps?
>
> -- Alex
>
> On 9/16/20 2:18 PM, Nuno Miguel Reis wrote:
> > Hello everyone.
> >
> > I've started to have an issue with a kamailio 4.4 instance listening on
> > multiple network interfaces where it stops processing SIP on one of it's
> > network interfaces but still continues to work fine on the others. If I
> > restart kamailio everything starts working fine again.
> > I'm using the default 'children=8' and one of my guesses on why this
> > could be happening is that the number of childs processing couldn't be
> > enough. Do you remember anything else on an issue like this where I
> > should be looking?
> >
> > Thanks.
> > --
> > Nuno Miguel Reis
> > Departamento de Engenharia Informática
> > Faculdade de Ciências e Tecnologia
> > Universidade de Coimbra
> >
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >
>
> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
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