DNS primary and secondary receiveing queries at the same time

Roberto Carna robertocarna36 at gmail.com
Thu May 17 14:25:52 UTC 2018

Dear Tony, so you say that it's impossible what I want...

In this scenario that my two DNS servers respond queries at the same
time, suppose the primary server goes down....how do clients know that
they have to query the secondary DNS server at this moment?

Thanks again.

2018-05-17 11:19 GMT-03:00 Tony Finch <dot at dotat.at>:
> Roberto Carna <robertocarna36 at gmail.com> wrote:
>> I always believed that all the client queries coming from Internet go
>> to the DNS primary server, and if it is down, just in this case go to
>> the DNS secondary server.
> It can't happen that way because there's no way for a resolver to tell
> which is which.
> Tony.
> --
> f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
> Hebrides: Southeast 4, veering south 5 or 6, then veering west later. Moderate
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