[asterisk-users] Lost outgoing SIP packets

[Roel van Meer]

Ethy H. Brito writes:

> Just guessing: do you have conntrack enabled?

Yes, I do.

> If not, "modprobe nf_conntrack_netlink" (you can remove it and its  
> dependencies
> later)
>
> What are the outputs of
> 	sysctl net.netfilter.nf_conntrack_count
> and
> 	sysctl net.netfilter.nf_conntrack_max
>
> when the problem shows up?

Hm, good one. I'll monitor them. Currently the values are:

root at communiceer:~# sysctl net.netfilter.nf_conntrack_max
net.netfilter.nf_conntrack_max = 65536

root at communiceer:~# sysctl net.netfilter.nf_conntrack_count
net.netfilter.nf_conntrack_count = 245

I'll report back if the count comes anywhere near maximum.

Are there any other limits like these that might play a role here?

Thanks,

Roel


> cheers
>
> Ethy
>
> On Thu, 31 Mar 2016 12:17:12 +0000
> "Dovid Bender" <dovid at telecurve.com> wrote:
>
> > Just guessing I would verify that the out of : iptables -L -nv
> > Shows no dropped packets, try disabling selinux as well as look at the  
> limits
> > of the asterisk pid (cat /proc/<Asterisk PID>/limits). I know the defualt  
> for
> > rhel is 1024 which was never enough for us.
> >
> >
> > Regards,
> >
> > Dovid
> >
> > -----Original Message-----
> > From: Roel van Meer <roel at 1afa.com>
> > Date: Thu, 31 Mar 2016 14:10:48
> > To: <dovid at telecurve.com>; Asterisk Users Mailing List - Non-Commercial
> > Discussion<asterisk-users at lists.digium.com> Subject: Re: [asterisk-users]
> > Lost outgoing SIP packets
> >
> > Dovid Bender writes:
> >
> > > The tcpdump that you are running is on the Asterisk box or via port
> > > mirroring?
> >
> > It's on the asterisk box itself.
> >
> > I've already replaced the network card - no change.
> >
> > Thanks,
> >
> > Roel
> >
> >
> > > Regards,
> > >
> > > Dovid
> > >
> > > -----Original Message-----
> > > From: Roel van Meer <roel at 1afa.com>
> > > Sender: asterisk-users-bounces at lists.digium.comDate: Thu, 31 Mar 2016
> > > 13:34:51
> > > To: <asterisk-users at lists.digium.com>
> > > Reply-To: Asterisk Users Mailing List - Non-Commercial Discussion
> > >  <asterisk-users at lists.digium.com>
> > > Subject: [asterisk-users] Lost outgoing SIP packets
> > >
> > > Hi list!
> > >
> > > I have a problem where SIP packets sent by Asterisk do not hit the wire,  
> and
> > > I don't know what could cause this.
> > >
> > > I'm running Asterisk 1.8.28_cert5 with full SIP debug. At the same time,  
> I'm
> > > doing a tcpdump of the traffic on the network interface. I can see in the
> > > SIP debug log that asterisk is sending packets. Most of the time, I can  
> see
> > > those packets in the tcpdump, as you would expect.
> > > However, sometimes Asterisk sends a packet that *does not show up* in the
> > > tcpdump. Asterisk then does several retransmits (that also don't show  
> up).
> > > The next packet that is not a retransmit does show up again.
> > >
> > > This causes Asterisk to log the peer it was sending packets to  
> temporarily
> > > as Lagged or unreachable.
> > >
> > > There is no outgoing firewall on this box.
> > >
> > > Could anyone give me some pointers where to look?
> > >
> > > If Asterisk logs "VERBOSE[13019] chan_sip.c: Reliably Transmitting (NAT)  
> to
> > > x.x.x.x:" you would expect to see that packet in a tcpdump trace, right?
> > > What could cause this not to be so? Are there network statistics I could
> > > look at? Is there a counter in /proc or /sys for problems with sending
> > > packets? Anything?
> > >
> > > If more information is necessary please do let me know.
> > >
> > > Thanks a lot in advance,
> > >
> > > Roel
> > >
> > > --
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