The external DNS server would immediately return with a not found 
message.  Without internet access you'll have to wait for the timeouts, etc.

Joseph L. Casale wrote:
>> Asterisk gets very upset if it can't lookup the host name associated
>> with every IP on the system, normally it would use DNS to do this, but
>> since your Internet connection was down it could not do that.
> 
> So to clarify, it not only needs to resolve FQDN's, but do reverse lookups
> on ip's as well? I am not sure I noticed this, as the external dns provider
> it was using would have no reverse lookup zones for the internal clients?
> 
> On an additional note, I have not been able to get onsite yet, but the ISP 
> repaired
> the physical link and the system started working but the inbound sip provider 
> rang
> busy until I ssh'ed in and did a reload from the asterisk console? I thought 
> the
> system would re register any connections define with a "register =>" every 
> {n} seconds
> on its own? Is there something I can do to force what a reload did 
> automatically so if the link disappears it repairs itself on its own?
> 
> Thanks!
> jlc
> 
> 
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-- 
Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS, 
T-1, PRI, Frame Relay, Linux, and network design.  Based near 
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