[Pdns-users] IPv4/IPv6 nameserver preference by recursor?

Darren Gamble Darren.Gamble at sjrb.ca
Tue Jun 15 23:10:11 UTC 2010

Good day,

We just wanted to get some information on how the recursor behaves when
presented with a NS record set containing both IPv6 and IPv4 addresses,
and/or if a NS record name has both A and AAAA records.

If there a preference by the recursor to prefer one protocol over the

How does the recursor handle a nameserver name with both A and AAAA
record types?  Is it capable of using both if one is unreachable?  Is
there a preference?


Darren Gamble
Systems Architect
Core Service Development
Shaw Cablesystems GP
630 - 3rd Avenue SW
Calgary, Alberta, Canada
T2P 4L4
(403) 781-4948

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