Hi Reinier,

I would change just the TTL asap. That means that you tell the other dns servers to check up more often. When its time to change the IP of the NS servers then most of the clients/servers/caches should be on a much shorter lookup period already. In that way service disruption should be lowered to a minimum. You can change back the TTL to 24 hours afterwards.
Rgds,
Rocco

On 09/04/2010 13:30, Reinier Battenberg wrote:
Hi Rocco,

good one.

Thing is, i could start changing now, then i have to wait 24 hours and pray
everyone has visited, then make the change (during the day, or wait until
saturday night?)

Or I start the change tonight, and then i have missed some ISPs?

Between a rock and a hard place.

(started on implementing this on the 100 domains we defined though on a link
that is slower than dialup today)

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