Mark Courtney writes:
> Is there a way to go about this IP changing without having the
> downtime while waiting for all the DNS servers on the Internet to get
> the new IP?

Well in advance of the change, set your TTLs very low.  tinydns can
dynamically adjust TTLs and automatically switch between two IP addresses at
a specified time.  This will help eliminate down time, but won't work for
everything, as some DNS caches do not respect low TTLs.

The only solution is to have the affected services operating on both sets of
IP addresses during the transition period.  This can be difficult, but it is
a requirement.  You normally have no way to control the TTLs on your name
server glue records.

Your procedure is overly complex because you should not have to rename your
name servers.  Setup name service on both sets of IP addresses.  Serve the
old addresses from the old name servers and new addresses from the new name
servers.  Then simply update the IP addresses of the name servers with your
registrar (which updates these glue records with the registry).

-- 
David Phillips <david at acz.org>
http://david.acz.org/


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