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Re: moving MX IPs
From: Len Conrad
Date: Thursday, December 27, 2001
Time: 3:27:54 am
>Hi All: Just a quick refresher to make sure I'm on top of the situation:
>
>I want to move my primary mailserver from one IP to another.
>
>My default TTL for my domain is 86400 ... 1 day ... correct?
if that's what you set it to....
>I've changed the TTL on my A record for the mailserver to 1200 (20 minutes).
ok
>How many days do I have to allow for my new TTL setting to kick in before
>switching the MX's IPs?
the TTL for those records, ie, 1 day.
>1 day? 7 days
I don't know where you get 7 days from. TTL is TTL.
>? IOW: will routers, proxies and other caching devices respect the
>TTL settings
most do, some don't
>both for the domain and the A record, or do I have to wait longer
>for everything to flush out?
the maximum pre-window before changing is simply whatever TTL your have
before the change, reduce small new TTL, wait for "old TTL", do the change,
increase TTL to old values.
Len
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