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On 07/12/00 at 08:47, Higher Powered web wrote:
Re: DNS not propogating properly??
From: Global Homes Webmaster
Date: Wednesday, July 12, 2000
Time: 10:19:55 am
> thanks everyone!
> I've chcnged the TTL and the minimum field to 300. I'm sure I only needed
> to change one, but I figured I'd be safe.
I was a little confused by QDNS's terminology on this myself. The Domain
Information window, which represents the SOA record for a zone, has a field
labelled 'Minimum' and a field labelled 'Time to Live.' According to the
QDNS manual, the 'Minimum' field corresponds to the SOA 'minimum TTL,'
which is the default TTL that applies to individual records. The 'Time to
Live' field is a TTL for the domain information record (the SOA itself),
and it defaults to the 'Minimum' value if left empty. At any rate, there's no
harm in your setting them both to 300, because you do want shortened values
for both.
> This afternoon(at the 25th hour) I will change the records with internic for
> the domain servers ip addresses, wait for them to update their records, and
> switch back to 24 hours for TTL.
I hope you also shortened the 'Refresh' value in your zone files. Otherwise,
your secondaries could hold onto the old data for as long as whatever your
normal refresh value is. QDNS's default for it is, I believe, 8 hours, so if
you've been just using the defaults, your secondaries could be giving out old
information for up to 8 hours after you make your changeover. To tie in with
another recent thread, once we have QDNS 3 with DNS Notify, you won't have to
worry about juggling refresh values in this situation (as long as your
secondaries also support DNS Notify).
> I guess this is practice for when I have to do this next month again!
Practice makes perfect... ;-) But seriously, after you've done it once, you
won't be nearly so anxious when you have to do it again.
Christopher Bort
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