[Pdns-users] DNS servers

Peter van Dijk peter.van.dijk at netherlabs.nl
Thu Mar 22 21:25:19 UTC 2012


On Mar 22, 2012, at 18:38 , Eduardo Casarero wrote:
> 2012/3/22 Mikhail Nasonov <mnasonov at me.com>
> Friends, Hello!
> I have a question, maybe you can help me.
> For example, domain name example.com contains 4 unicast DNS server specified by the registrar:
> ns1. example.net (United States)
> ns2. example.net (Europe)
> ns3. example.net (Russia)
> ns4. example.net (Asia)
> I am, for example, in Africa.
> On which of the DNS-servers a query will come? At the closest route to the network (Anycast) or just random (RoundRobin)?

If the 4 name servers are unicasted, anycast does not come into play. However, recursor keeps statistics about response time and will basically prefer the closest one as soon as it has figured out which one is.

Kind regards,
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/

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