[dns-operations] using different DNS providers together

[Mike Jones]

On 7 November 2012 00:57, Feng He <fenghe at nsbeta.info> wrote:
> 于 2012-11-7 0:34, Mike Jones 写道:
>
>>   If a resolver has a smaller cached NS set (for
>> example only the 2 cloudflare ones) and all of those servers are down
>> it might go back to the parent and find the other servers that are
>> still up.
>
>
> Will a resolver (i.e, a BIND Cache) do this stuff automatically? that sounds
> cool.

I have heard this technique discussed, i'm not sure how the commonly
used resolvers (BIND, Unbound, powerdns, etc) behave with this regard.
I suspect it will vary between vendor and potentially versions, either
way I wouldn't count on resolvers being this kind to you. I did say
might :)

- Mike