On 21/06/12 10:34, Mark Slater wrote:
> HI Mark,
>
> It seems the DNS time was set at 48 hours and the changes were put in
> ~40 hours ago so I suspect we just got unlucky.
Too late now, but for future reference for other sites, if you are
planning to change the IP address of machines, then you should ask your
network team to reduce the DNS time to live some time in advance of
the change...
Googling "dns ttl" brings up
http://www.dnswatch.info/articles/dns-update
which looks sensible (not that I've ever done this myself).
Chris
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