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

Kevin Darcy <kevin.darcy@fcagroup.com> Fri, 18 October 2019 15:28 UTC

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From: Kevin Darcy <kevin.darcy@fcagroup.com>
Date: Fri, 18 Oct 2019 11:28:20 -0400
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Subject: Re: [DNSOP] valid value range for SOA REFRESH/RETRY/EXPIRE
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[ Classification Level: PUBLIC ]

Apologies if this sounds condescending, but I haven't seen RFC 1982
mentioned in this thread so far.

While that RFC may not be the last word on the acceptable values of
SOA.SERIAL, in normal operation, it does contain some advice on how to
effectuate (or avoid) a "reset" of a zone's serial.


                          - Kevin

On Thu, Oct 17, 2019 at 7:49 PM Mark Andrews <marka@isc.org>; wrote:

>
>
> > On 18 Oct 2019, at 10:46 am, 神明達哉 <jinmei@wide.ad.jp>; wrote:
> >
> > At Fri, 18 Oct 2019 10:25:29 +1100,
> > Mark Andrews <marka@isc.org>; wrote:
> >
> > > > one obvious interpretation is that REFRESH/RETRY/EXPIRE are signed 32
> > > > bit integers.
> > >
> > > They are all intervals.  How do you have a negative interval?
> >
> > I actually didn't expect they can be negative.  My main question is
> > whether values larger than 2^31-1 should be considered valid.
>
> Well they are in range.  That said slaves can and do apply sanity
> checks to these values.  Both too low and too high cause operational
> problems.
>
> Mark
>
> > --
> > JINMEI, Tatuya
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>
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