Re: [Ntp] NTP Extensions (was Re: Last Call: <draft-ietf-ntp-using-nts-for-ntp-22.txt> (Network Time Security for the Network Time Protocol) to Proposed Standard)

Harlan Stenn <stenn@nwtime.org> Wed, 19 February 2020 22:15 UTC

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To: Watson Ladd <watson@cloudflare.com>
Cc: NTP WG <ntp@ietf.org>
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From: Harlan Stenn <stenn@nwtime.org>
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Date: Wed, 19 Feb 2020 14:15:31 -0800
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Subject: Re: [Ntp] NTP Extensions (was Re: Last Call: <draft-ietf-ntp-using-nts-for-ntp-22.txt> (Network Time Security for the Network Time Protocol) to Proposed Standard)
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On 2/19/2020 2:11 PM, Watson Ladd wrote:
> On Wed, Feb 19, 2020 at 2:08 PM Harlan Stenn <stenn@nwtime.org> wrote:
>>
>>
>>
>> On 2/19/2020 1:59 PM, Watson Ladd wrote:
>>> On Wed, Feb 19, 2020 at 1:33 PM Harlan Stenn <stenn@nwtime.org> wrote:
>>>>
>>>> Except that we did discuss this, years ago, and there was a meeting with
>>>> me and Karen and I forget who else where we specifically said that
>>>> 0xnn04 was already allocated for NTS.  I've long been saying we need a
>>>> way to make progress with EF proposals that does not cause collisions
>>>> between inplementations and avoids flag days.  Furthermore, I told Karen
>>>> that the NTP Project was using 0xNN0[5-9] for other proposals and that
>>>> with no progress on changing the way the NTP Extension Field IANA
>>>> registry was being managed, that 1) the NTP Project has a chalkboard
>>>> that we're using for this purpose, and 2) if anybody wants to work on an
>>>> EF they should just let me know.
>>>
>>> The way to achieve this is to make an experimental/private use range
>>> for the registry. The registry is currently IETF review, which is
>>> annoying: it's big enough to be Specification Required unless
>>> proposals take large chunks of the range. It's not impossible to
>>> change this with WG consensus.
>>
>> Sorry, no.  There are 8 bits available for this.  If you would have
>> followed the design that was put in place 20 years ago you'd know this.
> 
> RFC 7822 allocates 16 bits for extension types.

RFC7822 was a terrible mistake in many ways, and I continue to regret
that I did not read it carefully when the vote was taken.  I spent a lot
of time and effort trying to clean that up and got no support for those
efforts.

So here we are.

-- 
Harlan Stenn <stenn@nwtime.org>
http://networktimefoundation.org - be a member!