asterisk users - Jun 2005 - Qualify Frequency

How frequent do the qualify packets go out?

I've got 5 phones at a remote location with ADSL and their qualify is 
set to 5000.

I've noticed that they will go "UNREACHABLE" and then immediatly
go
"REACHABLE" within a second or two.

We have this theory that the ADSL link (SBC) "caches" its route to our
network (where Asterisk is) and so we get bad ping times while the route 
is being re-cached.

We'd like to be able to increase the frequency the qualify packets go 
out to keep this "cache" alive.

Any thoughts?

Thanks,
-Matthew

> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com
> [mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of Matthew
> Boehm
> Sent: Friday, June 24, 2005 2:27 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] Qualify Frequency
> 
> 
> How frequent do the qualify packets go out?
> 
> I've got 5 phones at a remote location with ADSL and their qualify is 
> set to 5000.
> 
> I've noticed that they will go "UNREACHABLE" and then
immediatly go
> "REACHABLE" within a second or two.
> 
> We have this theory that the ADSL link (SBC) "caches" its 
> route to our network (where Asterisk is) and so we get bad ping times 
> while the route is being re-cached.
> 
{clip}

See the (currently slightly borked) patch in bug 4192
(http://bugs.digium.com/view.php?id=4192)

In my experience the flapping IAX connection issue is occuring because of the
loss of the packet containing the ping, or momentary congestion of that packet.

Hope that helps.

Kris Boutilier
Information Services Coordinator 
Sunshine Coast Regional District