>1. Should I add the new ip address make the DNS change and run both IP
>addresses at the same time. If so how do I add the second IP address to
>Imail.
if you have 300 mailhosts on one ip, you don't add the ip to Imail,
but NT tcp/ip and Imail will pick up that ip and listen on it.
When the original ip is no longer used, you delete it from NT and
then have to go into the registry of Imail to delete it there.
>2. Gradually shorten the TTL until it's down to one hour and swap IP's
Just drop it all at once so the zone file have the default TTL and
SOA TTL set to
$TTL 3600
... now and wait until your previous TLL expires. Means increased
DNS traffic for a day or week, but no panic.
Once your old TTL has expired, submit the DNS HOST ip changes to your
registrar. When those hit the roots, the traffic will star arriving
at the new ip's. Then goose up your TTL's to 1D or 1W.
Len
http://BIND8NT.MEIway.com: ISC BIND 8.2.2 p5 installable binary for NT4
http://IMGate.MEIway.com: Build free, hi-perf, anti-spam mail gateways
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