DNS cache time to live
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Mon Mar 13 22:53:07 UTC 2000
All DNS records have a Time To Live (TTL) field. This specifies
the maximum time for how long a record will live in a cache.
On the master server records either have an explict TTL or inherit
it from the SOA minimum field or the TTL directive.
e.g.
example 3600 IN A 10.0.0.1
or
$TTL 3600
example IN A 10.0.0.1
In general the old record should disappear after SOA refresh +
TTL. The SOA refresh is how long it should take the slaves to
update their copy of the zone.
Mark
> How long a DNS client cache remain active? For example if I change
>
> a workstation address at DNS server, how many time the client need
>
> to update the cache?? There is any parameter to adjust this time??
>
> I'm using bind 8.1.2 with Solaris 2.7.
>
>
> Thanks in advance,
>
>
> Marcelo Camargo
> CETELEM - Brasil - SP
>
>
>
>
--
Mark Andrews, Nominum Inc. / Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
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