Dear Roman

Many thanks for your review!

I feel I'm standing between the proverbial hammer and hard place. I trust
you guys at the telechat discussed it. Sorry I could not attend, I was on
the road at the time.

Please see the proposed diffs in github  Dear Roman ·
pthubert/6lo-prefix-registration@dde1a90
<https://github.com/pthubert/6lo-prefix-registration/commit/dde1a903729546131610c7e18a838b2a3460e4e3>
and
my responses below:




Le mer. 4 juin 2025 à 20:00, Roman Danyliw via Datatracker <[email protected]>
a écrit :

> Roman Danyliw has entered the following ballot position for
> draft-ietf-6lo-prefix-registration-12: Discuss
>
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> The document, along with other ballot positions, can be found here:
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>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> ** As other ADs have balloted, [I-D.kuehlewind-update-tag] has no
> standing.
> Section 2.1 appears to state that “extends” and “amends” are synonyms for
> “updates”.  I take that to mean that the processes associated with the
> “updates
> tag” apply.  As such, the document is not self-consistent:
>
>
The way I use the draft was pushed on us by IESG reviews one or 2
generations ago. Took some work to rewrite drafts at the time to comply.
Note that I was perfectly happy with the "updates" tag as it stood 5 years
ago. But now I'm utterly confused with what the IESG expects.
Multiple IESG reviews insist on a "usual" meaning for "updates".  "Usual"
does not qualify well my perception of how "updates" is used. I
have in mind that the lack of clarity of what constitutes an update is what
triggered [I-D.kuehlewind-update-tag].
Do we have a better reference now?



> -- Section 5 says this documents extends RFC7400, but this document isn’t
> included in the “Updates meta-data” (RFC8929 is also noted as “extending”
> but
> is included in the list of documents referenced by the update tag)
>

I agree it's not consistent. At the moment I expect to get a recommendation
from the telechat on which drafts you expect to be mentioned in the
"updates" tag.
I removed RFC 8929. I also changed the way RFC 4861 is used to end the
debate on whether signaling a prefix in the NS Target Address constitutes
an update. Instead, I made it an address that matches the prefix so RFC
4861 is not updated.

I'm still unclear whether extending a spec is considered as an update:
e.g., draft_ancestor defines a field "reserved" to be ignored on receive.
draft_new provides a behaviour. Meaning that the receiver will not ignore
any more. This is a change of behavior. With the "new" terminology that's
an "extends". Is it an update?
Note that one review asked me to remove RFC 7400 from the "update" list and
I was fine with that. Now it seems (I hope not?) that you're asking it
back. In my past RFCs, I did not indicate RFC 7400 in my update tags.The
IANA registry is a good source for all the bits, following an "update" list
might be too much.



>
> -- The Updates meta-data tag and abstract say RFC6553 is updated, but the
> body
> of the text doesn’t explain how.  There isn’t even a reference to it.
>
>
True. I guess that one is an easy remove


>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thank you to Dan Romascanu for the GENART review.
>
> ** Section 13.2.  The registry field names used in Table 3 are not
> correct.
> Per
>
> https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml#sixlowpan-capability-bits
> :
>
> -- s/Capability Bit/Bit/
> -- s/Meaning/Description/
>
>
> Done. I noticed that the "A" bit is called the "1" bit. A typo I guess.

Specifically with the figure from RFC 7400 that I reproduced.I marked the
32 bits field "reserved". One review (Med)  asked me for consistency with
RFC 7400 so I should call it unassigned. OK, reluctantly I did, claiming
that RFC 7400 called it unassigned in the text, but the process described
was the usual one for "reserved". Now I'm getting comments that I should
call it "reserved" because of other RFCs (including mine) that call it
reserved. I'll make it Reserved again. Seems that the last reviewer wins,
but the document potentially loses. I guess contradictions in reviewers
expectations are part of the game, it's an imperfect world; and I applied
my best judgement.

take care,

-- 
Pascal
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