[v6ops] Pretty Please? - Disposition of draft-ietf-v6ops-cpe-slaac-renum-05

Warren Kumari <warren@kumari.net> Tue, 08 December 2020 21:14 UTC

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From: Warren Kumari <warren@kumari.net>
Date: Tue, 8 Dec 2020 16:13:45 -0500
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To: IPv6 Operations <v6ops@ietf.org>, Fernando Gont <fgont@si6networks.com>, "Rob Wilton (rwilton)" <rwilton@cisco.com>
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Subject: [v6ops] Pretty Please? - Disposition of draft-ietf-v6ops-cpe-slaac-renum-05
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[ Subject edited to start new thread ]
Hello again all,

I started this thread back in October, and then didn't really follow-up; sorry.

This document went through WGLC as Informational, but uses
"pseudo-RFC2119" language
Section 2). This section says things like (cribbed from RFC7084):
" Take careful note: Unlike other IETF documents, the key words "MUST",
   "RECOMMENDED", "MAY", and "OPTIONAL" in this document are not used as
   described in [RFC2119].  This document uses these keywords not
   strictly for the purpose of interoperability, but rather for the
   purpose of establishing industry-common baseline functionality. "

This caused confusion during IESG eval -- what does the MUST in "CE
routers MUST signal stale configuration..." mean if not in the RFC2119

Also, much of the document reads like a BCP - Alissa specifically
called this out in her DISCUSS, but there were quite a few others who

As an example, is it not a Best Current Practice that e.g: "CE routers
SHOULD NOT automatically send DHCPv6-PD RELEASE messages upon reboot
events."? If not, what does this document mean for an implementer?

There are 2 options here:
1: We change Section 2 to use normal RFC2119/RFC8174 language. I send
it back to the WG and it gets WGLCed as BCP.

2: We remove Section 2, and all of the uppercase/lowercase words. I
send it back to the WG (because of the changes) and it gets WGLCed as
Informational again.

I really prefer Option 1 -- to me it reads much more like a BCP,
documenting Best Current Practices for CPE implementers.

The last time I sent this, there was only one response[0] and then the
thread died -- I'd REALLY appreciate clear responses from the WG on
which option (1 or 2) you prefer...


[0]: https://mailarchive.ietf.org/arch/msg/v6ops/xVv4f73kB8tRFag3yJCBAraXwXk/

On Thu, Oct 22, 2020 at 11:53 AM Warren Kumari <warren@kumari.net> wrote:
> Hi all,
> draft-ietf-v6ops-cpe-slaac-renum-05 was on today's telechat, and ran
> into issues.
> Alissa (based on the Gen ART review) asked why this was not a BCP, and
> there was general agreement within the IESG that BCP seems like most
> reasonable status.
> There was also discussions on the:
> "Take careful note: Unlike other IETF documents, the key words "MUST",
> [...]  "OPTIONAL" in this document are not used as described in [RFC2119]."
> and that this was very confusing.
> I proposed that we change the status to BCP, and that the terms be
> used in the normal manner.
> I'd like to give the WG 2 weeks to object to this proposal, and, if
> none received, start another IETF LC as BCP.
> So, please let me know (by Nov 5th) if you strongly object to this
> becoming a BCP, and the "normal" RFC2119/BCP14 meanings being used for
> the recommendations **in this document**.
> W
> --
> I don't think the execution is relevant when it was obviously a bad
> idea in the first place.
> This is like putting rabid weasels in your pants, and later expressing
> regret at having chosen those particular rabid weasels and that pair
> of pants.
>    ---maf

The computing scientist’s main challenge is not to get confused by the
complexities of his own making.
  -- E. W. Dijkstra