Re: [DNSOP] valid value range for SOA REFRESH/RETRY/EXPIRE

Tony Finch <dot@dotat.at> Mon, 21 October 2019 12:18 UTC

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Date: Mon, 21 Oct 2019 13:18:34 +0100
From: Tony Finch <dot@dotat.at>
To: =?UTF-8?B?56We5piO6YGU5ZOJ?= <jinmei@wide.ad.jp>
cc: Mark Andrews <marka@isc.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] valid value range for SOA REFRESH/RETRY/EXPIRE
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神明達哉 <jinmei@wide.ad.jp> wrote:
>
> Anyway, my interpretation of the responses so far (or the lack of
> thereof) is that no one knows (or cares about) the exact range (per
> protocol standard) for these parameters.  That's not the best result I
> wished to see, but at least it looks like I didn't miss anything
> obvious for others.

I would be inclined to treat them like TTL values and follow section 8 of
RFC 2181, but as Mark said, the signedness doesn't affect the behaviour
since you'll be clamping the values between something like a few minutes
and a few weeks.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
Portland, Plymouth: Northeast 3 or 4, becoming variable 3 or less later.
Smooth or slight, occasionally moderate at first in west Plymouth. Showers.
Good.