Moving dynamic zones to new master+slave pair without interruptions

Peter Rathlev peter at
Thu Jan 7 09:38:10 UTC 2016

On Thu, 2016-01-07 at 09:30 +0000, Niall O'Reilly wrote:
> After reading other messages in this thread, it occurs to me that if
> enough of your client systems use DHCP to configure their stub
> resolvers, you could approach the problem from the other end by just
> adding more caching resolvers (perhaps on a new set of anycast
> addresses) and then change the option (perhaps using a gradual
> per-network roll-out) in the DHCP configuration(s).

We're also moving the recursive resolver function away from these
servers, but since the hardware is rather old (from 2006) we want to
move everything, including the authoritative role.

Generally our clients only query the anycast addresses and those can
easily be moved elsewhere. The IP addresses of the authoritative name
servers can thus be changed without incident.

Peter Rathlev

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