TTL of 6hrs for just 1 A record?
Joseph S D Yao
jsdy at center.osis.gov
Fri Nov 30 03:47:51 UTC 2001
On Fri, Nov 30, 2001 at 02:29:22PM +1100, Mark_Andrews at isc.org wrote:
> All records in a RRset should have the same TTL. Servers enforce
> this either by minimizing all the TTL's in the RRset on load/
> reception and/or by discarding the RRset when any of the RRs in the
> RRset expire. Only very old servers expire RRs individually.
>
> Different RRsets can have different TTLs.
In other words:
ichilton.co.uk. 6h IN A 216.28.122.60
ns1.ichilton.co.uk. 1h IN A 216.28.122.60
ns2.ichilton.co.uk. 1d IN A 217.33.93.50
is fine. But:
ichilton.co.uk. 6h IN A 216.28.122.60
ichilton.co.uk. 1d IN A 217.33.93.50
ichilton.co.uk. 1y IN A 127.0.0.1
is bad in many ways [no, I don't think "1y" really works ;-)].
--
Joe Yao jsdy at center.osis.gov - Joseph S. D. Yao
OSIS Center Systems Support EMT-B
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