Mark_Andrews at isc.org
Tue Oct 16 22:31:16 UTC 2007
> What dictates how long another name server caches the authoritative name
> server for a domain? I was under the impression it was the default
> time-to-live, but I have a situation where an authoritative name server
> was removed from service several days ago, yet queries to it continue. Dig
> is correctly reporting the new authoritative name servers for the domain
> in question. How common is it for DNS servers to ignore the ttl?
Because you failed to update *ALL* the servers for the zone to
have the new content. Every time a cache queries the old servers
it re-learns the old NS RRset for the zone.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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