asterisk users - Apr 2008 - Asterisk temporary hangs when no internet connection

Hello all,

I have the following problem: if there is a temporary loss of Internet
connectivity, the asterisk server 'hangs' if it has external SIP trunks
configured. By hanging I mean that any calls between the local extensions
and any calls to the voicemail extension stop working. Everything works fine
again when the internet connectivity returns (I tested this by removing and
reinserting the network cable from the cable modem).

My guess is that the asterisk server tries resolving the names of the SIP
providers when it tries to re-register to them and because there is no
internet connectivity it hangs there for a while. However in that time all
the local calls to the asterisk server stop working.

Has anybody else encountered this problem?

Thanks!
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Marius Muja wrote:
> My guess is that the asterisk server tries resolving the names of the 
> SIP providers when it tries to re-register to them and because there 
> is no internet connectivity it hangs there for a while. However in 
> that time all the local calls to the asterisk server stop working.
Try using a local DNS server.  Sounds like its waiting on DNS lookups...

It is using a local DNS server.

On Fri, Apr 11, 2008 at 10:43 AM, Steven Kurylo <steven.kurylo at
aviawest.com>
wrote:
> Marius Muja wrote:
> > My guess is that the asterisk server tries resolving the names of the
> > SIP providers when it tries to re-register to them and because there
> > is no internet connectivity it hangs there for a while. However in
> > that time all the local calls to the asterisk server stop working.
> Try using a local DNS server.  Sounds like its waiting on DNS lookups...
>
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This is a very common issue with Asterisk.  There is no good fix, but if 
you make sure ALL IP addresses of the server are listed in /etc/hosts on 
the server it may help.


Marius Muja wrote:
> It is using a local DNS server.
> 
> On Fri, Apr 11, 2008 at 10:43 AM, Steven Kurylo <steven.kurylo at
aviawest.com>
> wrote:
> 
>> Marius Muja wrote:
>>> My guess is that the asterisk server tries resolving the names of
the
>>> SIP providers when it tries to re-register to them and because
there
>>> is no internet connectivity it hangs there for a while. However in
>>> that time all the local calls to the asterisk server stop working.
>> Try using a local DNS server.  Sounds like its waiting on DNS
lookups...
>>
>> _______________________________________________
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>
>> asterisk-users mailing list
>> To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>
> 
> 
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Marius Muja wrote:
> Hello all,
>
> I have the following problem: if there is a temporary loss of Internet 
> connectivity, the asterisk server 'hangs' if it has external SIP 
> trunks configured. By hanging I mean that any calls between the local 
> extensions and any calls to the voicemail extension stop working. 
> Everything works fine again when the internet connectivity returns (I 
> tested this by removing and reinserting the network cable from the 
> cable modem).
>
> My guess is that the asterisk server tries resolving the names of the 
> SIP providers when it tries to re-register to them and because there 
> is no internet connectivity it hangs there for a while. However in 
> that time all the local calls to the asterisk server stop working.
>
> Has anybody else encountered this problem?
Yes, this is a common issue.  A workaround is to use IP Addresses or 
enter hostnames manually in /etc/hosts

Andres
http://www.neuroredes.com
>
> Thanks!
>
>
>------------------------------------------------------------------------
>
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>
>asterisk-users mailing list
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
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