[dns-operations] a question about the nameservers

[Feng He]

Thanks a lot. That make things clear.

26.10.2012, 22:36, "Olafur Gudmundsson" <ogud at ogud.com>:
> On 26/10/2012 05:43, Feng He wrote:
>
>>  Hi,
>>
>>  If the nameservers in parent is different from the ones in
>>  auth-servers, what will happen?
>>
>>  For example, with this case you can see the difference.
>
> Take a look at this:
> https://www.dns-oarc.net/files/workshop-201103/ICANN-SF-Looking-at-DNS-traces.pdf
>
> There is difference in how resolvers behave some resolvers will store
> the first
> NS set they see and use that one  (Parent centric resolvers)
> Others will accept NS set from child and over ride the first one (Child
> centric)
> If the child use minimal answer may resolvers are forced into
> Parent centric mode as they NEVER ask the child what its NS set is.
>
> There are resolvers out there that use the Parent NS for the first query but
> explicitly ask one of the name servers in the Parent NS set what the
> child version is.
>
> In short there are multiple behaviors out there and disagreement on what the
> "correct" behavior is.
> The child's interest are best served if the Parent and Child NS sets are
> identical.
>
>      Olafur
>
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