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Re: [DNSOP] I-D Action: draft-ietf-dnsop-rrserial-00.txt

Hugo Salgado <hsalgado@nic.cl> Mon, 14 June 2021 14:03 UTC

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Date: Mon, 14 Jun 2021 10:03:22 -0400
From: Hugo Salgado <hsalgado@nic.cl>
To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
Cc: dnsop@ietf.org
Message-ID: <20210614140322.GA3276@pepino>
References: <162342216090.6059.5920585323129043595@ietfa.amsl.com> <20210613161540.GA14433@sources.org>
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Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-rrserial-00.txt
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On 18:15 13/06, Stephane Bortzmeyer wrote:
> On Fri, Jun 11, 2021 at 07:36:00AM -0700,
>  internet-drafts@ietf.org <internet-drafts@ietf.org> wrote 
>  a message of 39 lines which said:
> 
> >         Title           : The "RRSERIAL" EDNS option for the SOA serial of a RR's zone
> >         Authors         : Hugo Salgado
> >                           Mauricio Vergara Ereche
> > 	Filename        : draft-ietf-dnsop-rrserial-00.txt
> 
> I do not understand why the RRSERIAL EDNS is not added for NXDOMAIN
> responses (section 3.2). Specially since it is added for SERVFAIL,
> which is surprising.
> 

Originally it was specified only for NOERROR, but after a suggestion in
the list it was seen that it could have value for some cases of SERVFAIL
where there are problems with certain RRs but it is possible to return
the RRSERIAL of the queried zone, which can help debugging.

In the case of NXDOMAIN, the reason for not adding RRSERIAL is because
the response already has the SOA in the AUTHORITY, which would make it
redundant.

Hugo

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