[Pdns-users] dynamic load balacing

Dave Sparro dsparro at gmail.com
Tue Jul 24 20:05:59 UTC 2007

On 5/21/07, fatih cerit <somenicit at hotmail.com> wrote:
> >From: Duane <duane at e164.org>
> >To: fatih cerit <somenicit at hotmail.com>
> >CC: pdns-users at mailman.powerdns.com
> >Subject: Re: [Pdns-users] dynamic load balacing
> >Date: Tue, 22 May 2007 01:51:21 +1000
> >
> >fatih cerit wrote:
> >>3- if your clients registering sip.example.com at and server
> >>down then your clients going to register sip.example.com at
> >>if you have a failover rotation rule at DNS level. But if you have a
> >>dynamic fail over rule you can say some clients register sip.example.com
> >>at
> >>
> >>thanks for your advice I am looking for a solution like 3th.
> >
> >At a guess you will most likely need some kind of hardware device beyond
> >simple DNS redirect as they cache and you can't control that completely
> >because you are at the behest of others... You can on the other hand
> >perfectly control a load balancing device.
> if I can query like this
> ....where type='A' and name='sip.example.com' and client_ip_address =
> '' ;
> I will be able to load balance and failover dynamically and maybe ttl times
> help me for caching of sip devices.
> _
Beware, the "client_ip_address" you see is not likely to be the
end-user's IP address, but that of the caching DNS server that their
stub resolver queries.

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