[asterisk-users] Asterisk eventually fails when connection dies

[Jeff LaCoursiere]

On Thu, 4 Jun 2009, Joseph L. Casale wrote:

>>> A persistent local DNS cache such as pdnsd[1] or djbdns[2] could help.
>>>
>>> [1] http://en.wikipedia.org/wiki/Pdnsd
>>> [2] http://en.wikipedia.org/wiki/Djbdns
>>>
>>>    Philipp Kempgen
>>
>> I am guessing it fails to reverse lookup your internal addresses (which
>> would fail anyway, even with the DNS up).  If your phones are static, just
>> make entries in /etc/hosts for them.  If they are dynamic, add entries in
>> your /etc/hosts for all the addresses in your DHCP pool.
>>
>> You can watch the attempted outbound traffic with tcpdump and see what the
>> server is trying to lookup when the registrations fail, and use /etc/hosts
>> to precede the lookup.
>
> Philipp and Jeff,
> Thank you both for the help. So the phones are dynamic, and I don't assign
> host names. Shall I just create something simple like "ip.addr extension_#"
> for each phone and add dhcp reservations, so extension 200 would get:
> `192.168.13.127 200` in the hosts file?

Sure.  I might name it something like "dhcp127" though.

>
> What would be the reason the recorded greeting doesn't get played right now
> while we are having an outage? Just part of asterisk failing under the current
> config? If no phones are available, should that not have an effect on what asterisk
> does when an inbound caller arrives?

This must be your dialplan.  Can you post it?

>
> I am driving out now to see what it's doing, I suppose something like:
> # tcpdump src host 127.0.0.1 and udp dst port 53
> would be what I need?

Close.  The packets won't be leaving from the loopback address.  Just 
something like:

tcpdump port 53

should be plenty.

Good luck!

j

>
> Again, appreciate the guidance!
> Thanks,
> jlc
>
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