For that we have the TTL (time to live) value in the DNS records. Lower
the TTL value to 300 (5 mins) of the respective record 24 hours before
the change then other DNS servers / caches / clients are instructed to
check back within the given time. After the change you can go back to
24hours (86400). If ISPs have a fixed cache time out that would be
against the IETF.
Rgds,
Rocco
On 09/04/2010 12:24, McTim wrote:
Ask folk (ISPs) to flush their DNS caches after DNS changes made?
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