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Re: [DNSOP] Creating a registry for reserved labels.

Paul Hoffman <paul.hoffman@icann.org> Thu, 27 September 2018 15:42 UTC

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From: Paul Hoffman <paul.hoffman@icann.org>
To: dnsop <dnsop@ietf.org>
Thread-Topic: [DNSOP] Creating a registry for reserved labels.
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Date: Thu, 27 Sep 2018 15:42:33 +0000
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Subject: Re: [DNSOP] Creating a registry for reserved labels.
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On 27 Sep 2018, at 8:13, Warren Kumari wrote:

> During the discussions on KSK Sentinel and MTA-STS (
> https://datatracker.ietf.org/doc/draft-ietf-uta-mta-sts/20/) the IESG noted
> that we recently have twice "reserved" use of a left hand (non-underscore)
> label.
>
> It is strongly felt that a registry to record names like this would be
> useful.
>
> Some examples of these names include:
> root-key-sentinel-not-ta-<number>.
> mta-sts.
> xn--(anything).

xn--(anything) labels can appear anywhere.

> Ok, good point.... but, I still think that labels which get special
> handling should be recorded *somewhere*, simply to satisfy the principle of
> least astonishment...

Fully agree. However, the registry should probably be for "special handling", not just for left-most position.
>
> So, does would anyone be willing to volunteer to write a "Special Use
> Labels" document (similar to draft-ietf-dnsop-attrleaf) simply creating a
> registry for "these left hand labels are special / funny in some way" ?

Sure.

--Paul Hoffman

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