[asterisk-users] Lost outgoing SIP packets

[Ethy H. Brito]

Hi Roel

Just guessing: do you have conntrack enabled?
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?

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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