[asterisk-users] Re: RE : SIP/IAX peers UNREACHABLE and audio loss

[Edoardo Serra]

Hi Francois,

f6hqz-m at hamwlan.net ha scritto:
> Hi men,
>  
> I have already encountered some issue like this with few switches (very 
> known great brand)  which doesn't like VoIP traffic !

I also have switches of a very known great brand !!
It was so strange to me that I didn't consider a network problem...

> Check by drectly connected the VoIP equipment - if you can - with 
> temporary long Ethernet cables bypassing the tested switch to see what 
> happens in this case.

I'd try to bypass the switch someway but every server neeeds to have its 
own public ip address..
I'll put an RTP proxy somewhere...

> You can also tell to "qualify" with a longer delay, but this could not 
> help in case of regulary frames losses.

What about turning qualify off ?
Do you think taht Asterisk is stopping RTP when it loose a qualify packet ?
Or is the RTP traffic itself that is lost by the switches ?

> Good luck !

It couldn't be more appropriate...

Tnx for help ;)

Edoardo


>  
> Francois BERGERET,
> France.
> 
>     -----Message d'origine-----
>     *De :* asterisk-users-bounces at lists.digium.com
>     [mailto:asterisk-users-bounces at lists.digium.com] *De la part de*
>     Rajeev Natarajan
>     *Envoyé :* samedi 24 mars 2007 08:14
>     *À :* Asterisk Users Mailing List - Non-Commercial Discussion
>     *Objet :* Re: [asterisk-users] SIP/IAX peers UNREACHABLE and audio loss
> 
>     Well, we have add similar issues - do you use a media gateway /.IP
>     Phones / softphones as your extensions?
> 
>     We were running Audiocodes and for some reason (I suspect a poor
>     ethernet switch), when there are more than 15 people using the line,
>     Audiocodes will not respond to a qualify and asterisk will drop the
>     call. Turned off qualify (removed qualify=yes) and <still keeping
>     fingers crossed> things seem fine.
> 
>     Rajeev
> 
>     On 3/23/07, *Edoardo Serra* <edoardo.serra at webrainstorm.it
>     <mailto:edoardo.serra at webrainstorm.it>> wrote:
> 
>         Hi all,
>                 I'm having a problem with some Asterisk servers
>         interconnected with
>         each other using IAX (I also tried with SIP without solving the
>         problem)
> 
>         Sometimes, with apparently no reason, some peers become UNREACHABLE
>         (I have qualify=yes in iax.conf) and REACHABLE again as soon as
>         another qualify test is made.
> 
>         Our users are also complaining about audio loss during their calls,
>         apparently randomly, everything goes ok for days and bad for
>         another few
>         days.
> 
>         I strongly believe the 2 problems are strictly related because
>         in the
>         logs I see REACHABLE / UNREACHABLE messages only for certains days
>         without regularity.
>         The days in wich i see a lot of messages are exactly the days with
>         most of complaint about audio loss
> 
>         I just noticed that timestamps of the logs (REACHABLE / UNREACHABLE)
>         are quite always during business hours, this makes me think at
>         somewhat
>         related to load (cpu load, badwidth load, calls load, etc...)
> 
>         But, looking at hardware specs of our lan, servers and average
>         load I
>         don't think they are over-stressed.
> 
>         Our servers are all:
>         2 x Intel(R) Xeon(TM) CPU 3.20GHz
>         1 GB RAM
>         2 x IDE HDDs Software RAID 1
>         Asterisk 1.2.13 with res_perl
>         Gentoo Linux
>         Some of them has a Sangoma card connected with an E1
> 
>         Most ot these are on the same LAN, interconnected with a 1 GB switch
>         (I don't think it should be a bandwidth problem).
> 
>         Load averages of these server is varying from 0.5 to 1.0
>         (I guess it should be ok)
> 
>         On each server we don't have more than 50 concurrent calls
>         (bridged SIP <-> IAX2 or IAX2 <-> ZAP)
> 
>         Used codec is mostly G729
> 
>         Sometimes on asterisk cli i see some messages like
>         "Avoided initial deadlock for '0x9fd130', 10 retries!"
>         I don't know if it could be somehow related.
> 
>         Someone of you can point me in the right direction ?
> 
>         Tnx in advance
> 
>         Regards
> 
>         Ing. Edoardo Serra
>         WeBRainstorm S.r.l.
> 
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