asterisk users - Nov 2005 - Delays in sip invites.

Hi all.

We are having some strange behaviors in our asterisk box. A Dual p4 Xeon
3ghz, with 2gb of ram and a a digium TE410p card.

The system is an Asterisk V 1.0.9 with Unicall 0.0.2c (Argentina variant) to
interconnect with an Alcatel pbx and to the pstn.

It has an average of 10 concurrent calls with several queues with statics
agents all of them. (an average of 24 agents logued in sip atas, an
audiocodes mp-124)

The problem is that Randomly we are having some delays when the application
dial is executed in the dialplan, trying to call to a sip where the agent is
logued in. Debuging we found that the invite request to the sip ata
sometimes takes from 20 seconds to 1 minute to be sended.(checked with
ethereal).The system never goes more than 30 % of cpu usage, and when this
happens, we noticed that the load average is always over 1, even when the
cpus are 99% idle and there is no other process running in background, only
asterisk.
Also, we checked that there is no packet loss and that the digium card isn't
producing spikes.


Anyone have ideas of what is happening?
Regards.
Ivan Cetta.
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No. in any place, even i haven't any agi script in the dialplan.

exten => _87XX,1,Dial(SIP/${EXTEN},60)

This is the only i have to call the sip ata.

Also, something i forgot to mention, i have in the sip.conf and the
audiocodes the srvlookup disabled. Browsing the problem in the list i see
that someones have something similar and was dns problem. But in our case,
changing that didin't resolved it.

Ivan Cetta.


2005/11/1, Iqbal <iqbal@gigo.co.uk>:
>
> are you doing enum lookups anywhere , had a problem with enum lookups
>
> Iqbal
>
> Ivan Cetta wrote:
>
> > Hi all.
> >
> > We are having some strange behaviors in our asterisk box. A Dual p4
> > Xeon 3ghz, with 2gb of ram and a a digium TE410p card.
> >
> > The system is an Asterisk V 1.0.9 with Unicall 0.0.2c (Argentina
> > variant) to interconnect with an Alcatel pbx and to the pstn.
> >
> > It has an average of 10 concurrent calls with several queues with
> > statics agents all of them. (an average of 24 agents logued in sip
> > atas, an audiocodes mp-124)
> >
> > The problem is that Randomly we are having some delays when the
> > application dial is executed in the dialplan, trying to call to a sip
> > where the agent is logued in. Debuging we found that the invite
> > request to the sip ata sometimes takes from 20 seconds to 1 minute to
> > be sended.(checked with ethereal).The system never goes more than 30 %
> > of cpu usage, and when this happens, we noticed that the load average
> > is always over 1, even when the cpus are 99% idle and there is no
> > other process running in background, only asterisk.
> > Also, we checked that there is no packet loss and that the digium
> > card isn't producing spikes.
> >
> >
> > Anyone have ideas of what is happening?
> > Regards.
> > Ivan Cetta.
> >
>
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