[asterisk-users] (solved) CPU Spikes in asterisk connected via IAX trunk

[Rajkumar S]

Hello,

I had posted this mail some time back, Having got no responses I tried
one suggestion I received in another thread and replaced all IAX
trunks with SIP trunks. That has resolved this issue. Asterisk now
does not hit more than 100% CPU and there is no call disturbance. CPU
usage is now is more even.

Thanks and regards,

raj

On Fri, Aug 14, 2009 at 12:31 PM, Rajkumar S <rajkumars at gmail.com> wrote:
> Hello,
>
> I have a 3 server asterisk configuration where one asterisk (say A) (v
> 1.4.25) has a digiuim card connected to E1 from which calls are routed
> to another asterisk server  (B) (1.6.0.9) over IAX trunk from which
> calls get routed to third server (C) (1.6.0.9) again via IAX trunk.
> SIP clients are connected to third server. A is the PSTN termination
> server, B runs the menu and AGI and C is where SIP clients connect.
> SIP clients can also dial outside and call goes like C -> B -> A ->
> PSTN.
>
> I am facing some call disturbance for agents connected via SIP in C.
> While investigating I found that CPU usage hits 99% occasionally and
> in general CPU usage is very un even. Load average also goes up
> correspondingly some times till about 30. It has no correlation with
> number of calls. Some times even with about 29 calls the cpu is not
> much loaded (10%) but it hits 60% 70% with about 6 calls (12 channels)
> some other times.
>
> I am using ulaw through out, (disallow=all; allow=ulaw in iax.conf and sip.conf)
>
> One correlation I found was that when ever agents transfer calls to
> main menu (ie to server B) there is a load spike. This transfer again
> goes via same IAX trunk as the incoming.
>
> IAX conf in C is:
>
> [general]
> bindport = 4569
> bindaddr = 0.0.0.0
> disallow=all
> allow=ulaw
> jitterbuffer=no
> forcejitterbuffer=no
>
> [a16-q1]
> type=user
> auth=plaintext
> secret=password
> context=inbound-calls
> qualify=yes
> trunk=yes
>
> [a16-q1-a16-in1]
> type=peer
> host=192.168.79.177
> auth=plaintext
> secret=password
> username=a16-in1
> qualify=yes
> trunk=yes
>
> IAX conf in B is:
>
> [general]
> bindport = 4569
> bindaddr = 0.0.0.0
> disallow=all
> allow=ulaw
> jitterbuffer=no
> forcejitterbuffer=no
> transfer = no
>
> [a16-in1]
> type=user
> auth=plaintext
> secret=password
> context=inbound-calls
> qualify=yes
> trunk=yes
>
> [a16-in1-a16-q1]
> type=peer
> host=192.168.79.176
> auth=plaintext
> secret=password
> username=a16-q1
> qualify=yes
> trunk=yes
>
> I am pretty much stumped here. Could IAX trunk be the source of the
> problem? Should I switch to SIP ?
>
> thanks and regards,
>
> raj
>