Re: [Idr] Warren Kumari's Discuss on draft-ietf-idr-ext-opt-param-11: (with DISCUSS and COMMENT)

Warren Kumari <warren@kumari.net> Wed, 21 April 2021 15:15 UTC

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From: Warren Kumari <warren@kumari.net>
Date: Wed, 21 Apr 2021 11:14:22 -0400
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To: John Scudder <jgs@juniper.net>
Cc: The IESG <iesg@ietf.org>, "draft-ietf-idr-ext-opt-param@ietf.org" <draft-ietf-idr-ext-opt-param@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf. org" <idr@ietf.org>, Hares Susan <shares@ndzh.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "acmorton@att.com" <acmorton@att.com>
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Subject: Re: [Idr] Warren Kumari's Discuss on draft-ietf-idr-ext-opt-param-11: (with DISCUSS and COMMENT)
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On Wed, Apr 21, 2021 at 11:04 AM John Scudder <jgs@juniper.net> wrote:

> Hi Warren,
>
> Thanks for your comment.
>
> I understand the “too clever by half” reaction. As I recall the motivation
> for this was that in the future we might want to migrate to using only this
> encoding. The "encode the short stuff the short way" is the obviously right
> thing to do for the immediate future, because the extension isn't (can't
> be) signaled. But in ten years or something, it potentially starts to feel
> annoying to have to drag the old encoding along even though everyone
> already adopted the new one a decade back. So this leaves the door open to
> us making that transition painlessly and without drama.
>

Ah, thanks.

Makes sense / good enough for me -- I'll clear my DISCUSS position.

W



>
> Regards,
>
> —John
>
> > On Apr 20, 2021, at 6:32 PM, Warren Kumari via Datatracker <
> noreply@ietf.org> wrote:
> >
> >
> > Warren Kumari has entered the following ballot position for
> > draft-ietf-idr-ext-opt-param-11: Discuss
> >
> > When responding, please keep the subject line intact and reply to all
> > email addresses included in the To and CC lines. (Feel free to cut this
> > introductory paragraph, however.)
> >
> >
> > Please refer to
> https://urldefense.com/v3/__https://www.ietf.org/iesg/statement/discuss-criteria.html__;!!NEt6yMaO-gk!RwBGRElSG71MB-4xuoZ_K7AsJh9Ov1reQdYmsqJiiijBgUzS0Q__vFRx6cpoZA$
> > for more information about DISCUSS and COMMENT positions.
> >
> >
> > The document, along with other ballot positions, can be found here:
> >
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-ietf-idr-ext-opt-param/__;!!NEt6yMaO-gk!RwBGRElSG71MB-4xuoZ_K7AsJh9Ov1reQdYmsqJiiijBgUzS0Q__vFQWHO5WBg$
> >
> >
> >
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > This should be a trivial to clear DISCUSS.
> > This text terrifies me:
> > "It is not considered a fatal error to receive an OPEN message whose
> > (non-extended) Optional Parameters Length value is not 255, and whose
> first
> > Optional Parameter type code is 255 -- in this case the encoding of this
> > specification MUST be used for decoding the message. A warning MAY be
> logged."
> > It smacks of trying to be too clever, and that the correct response
> (IMO) when
> > trying to set up a session with something obviously broken is to abort
> and
> > throw an error.
> >
> > However, I'm sure that there was some discussion, and that the WG
> decided that
> > this was a good idea; unfortunately I was unable to find anything
> discussion on
> > this, so all I'm asking for is some reassurance that this was discussed
> and
> > that this behavior was chosen as a good idea...
> >
> >
> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
> >
> > Thank you for this document. It is clear, and solves a real problem.
> >
> > Also, thanks to Al Morton for his OpsDir review - as always, it is much
> appreciated.
> >
> >
> >
>
>

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