asterisk users - Dec 2008 - Asterisk dies when external access is lost

Hello
 
Looking for some help with a rather odd problem.  We have Asterisk
1.4.10 running on a Linux box, within our Windows domain.  Our Domain
Controller is a Windows 2003 server, providing the normal Windows domain
functions, such as DHCP and DNS.
 
When we lose either our Domain Controller (for a reboot/maintenance) or
external ADSL access, Asterisk drops all SIP registrations - even
internal SIP calls within the building no longer function.
 
All of our SIP clients are assigned static IP addresses, and our
incoming lines are via a Zaptel card using (currently) analog lines from
our national telco.  When the SIP registrations drop, Asterisk will
still answer incoming calls via the Zap channels, but can't forward them
anywhere.
 
What is most confusing is a recent issue when our ADSL connections were
all offline, and despite everything internal to the network working
perfectly, all of the SIP phones stopped working and left us without
phones for 4 hours.
 
I'm suspecting that these two issues (losing connectivity when DC is
unavailable and losing connectivity when ADSL drops) are related, but I
can't figure out how?  I'm sure I'm missing something simple in the
config, but I've been tinkering with this issue since we were using
Asterisk 1.2 and I've still not resolved it.
 
Any help or comments would be appreciated...
 
Thanks in advance
 
Phil
 
 
Phil Knighton
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Phil Knighton schrieb:
> When we lose either our Domain Controller (for a reboot/maintenance) or
> external ADSL access, Asterisk drops all SIP registrations - even
> internal SIP calls within the building no longer function.
Not sure if it cures your problem but I would suggest running a
caching nameserver on the Asterisk servers.

http://lists.digium.com/pipermail/asterisk-users/2008-September/218764.html


   Philipp Kempgen

-- 
http://www.das-asterisk-buch.de  -  http://www.the-asterisk-book.com
Amooma GmbH - Bachstr. 126 - 56566 Neuwied  ->  http://www.amooma.de
Gesch?ftsf?hrer: Stefan Wintermeyer, Handelsregister: Neuwied B14998
--

just an idea, could it have something to do with DNS being unavailable, but
that wouldn't really explain why it would die when ADSL is down... hmmmm.

Cheers

Geraint

2008/12/11 Phil Knighton <phil.knighton at mjog.com>
>  Hello
>
> Looking for some help with a rather odd problem.  We have Asterisk 1.4.10
> running on a Linux box, within our Windows domain.  Our Domain Controller
is
> a Windows 2003 server, providing the normal Windows domain functions, such
> as DHCP and DNS.
>
> When we lose either our Domain Controller (for a reboot/maintenance) or
> external ADSL access, Asterisk drops all SIP registrations - even internal
> SIP calls within the building no longer function.
>
> All of our SIP clients are assigned static IP addresses, and our incoming
> lines are via a Zaptel card using (currently) analog lines from our
national
> telco.  When the SIP registrations drop, Asterisk will still answer
incoming
> calls via the Zap channels, but can't forward them anywhere.
>
> What is most confusing is a recent issue when our ADSL connections were all
> offline, and despite everything internal to the network working perfectly,
> all of the SIP phones stopped working and left us without phones for 4
> hours.
>
> I'm suspecting that these two issues (losing connectivity when DC is
> unavailable and losing connectivity when ADSL drops) are related, but I
> can't figure out how?  I'm sure I'm missing something simple in
the config,
> but I've been tinkering with this issue since we were using Asterisk
1.2 and
> I've still not resolved it.
>
> Any help or comments would be appreciated...
>
> Thanks in advance
>
> Phil
>
>
> Phil Knighton
>
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Phil Knighton wrote:
> Hello
>  
> Looking for some help with a rather odd problem.  We have Asterisk 
> 1.4.10 running on a Linux box, within our Windows domain.  Our Domain 
> Controller is a Windows 2003 server, providing the normal Windows 
> domain functions, such as DHCP and DNS.
>  
> When we lose either our Domain Controller (for a reboot/maintenance) 
> or external ADSL access, Asterisk drops all SIP registrations - even 
> internal SIP calls within the building no longer function.

Are the phones Polycom?


Doug

-- 
 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety."

Doug,

No, the phones are all Snom phones - a mix of 290s (actually elmeg
IP190), 320s and 360s.  Mostly using firmware v6.

Cheers

Phil 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Doug Lytle
Sent: 11 December 2008 12:12
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk dies when external access is lost

Phil Knighton wrote:
> Hello
>  
> Looking for some help with a rather odd problem.  We have Asterisk 
> 1.4.10 running on a Linux box, within our Windows domain.  Our Domain 
> Controller is a Windows 2003 server, providing the normal Windows 
> domain functions, such as DHCP and DNS.
>  
> When we lose either our Domain Controller (for a reboot/maintenance) 
> or external ADSL access, Asterisk drops all SIP registrations - even 
> internal SIP calls within the building no longer function.

Are the phones Polycom?


Doug

-- 
 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little
Temporary Safety, deserve neither Liberty nor Safety."


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