I our setup we don't have DNS or Internet connectivity but we are good
no issue so far.
--
Sent from my iPhone
On May 31, 2011, at 7:24 AM, Hans Witvliet <[email protected]> wrote:
On Mon, 2011-05-30 at 23:15 -0400, Jeff LaCoursiere wrote:
On Mon, 30 May 2011, Sherwood McGowan wrote:
True, but with all due respect, if the cache's TTL expires and the
OP's
PBX cannot reach an external DNS server, they have bigger
problems ;-)
Slainte all!
The Mick
I couldn't disagree more. In fact I think this problem is more
serious
than it is getting credit for, when asterisk is in use in places
where
Internet connectivity is far from stable. I have several hotels
that have
gone without Internet connectivity for days, and somewhere between
one and
three days down they can only spottily call within the system, and
can't
make outbound calls on their voice T1. Its certainly true that
they were
suffering without Internet access, but it is very hard to explain
to the
owners why they can't use their phones. In fact the symptoms are
very
strange - inbound calls on the T1 get the auto-attendant, but
internal
transfers fail. No one can call outbound, and only *sometimes* do
internal extension to extension calls fail.
I still scratch my head about what exactly asterisk is trying to
lookup
that keeps it from being able to place internal SIP calls from
extension
to extension, and sadly the few times this has occurred I wasn't
around to
debug.
Hasn't anyone managed to solve this with something better than a
caching
DNS server, which seems to only last a short while? What exactly
is going
on that is failing?
What kind of info is it about?
If it is the hostname of _local_ machines/clients, you should be
authoritive. That should keep asterisk happy.
If it is about remote nodes, well if your isp-connection is lost, you
can not contact them anyway ;-(
So run locally your bind-server, authoritive for your own addresses,
and
caching for external ones.
hw
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