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Re: [Ntp] Antw: [EXT] Re: Quick review of WGLC for status change for draft-ietf-ntp-update-registries

Harlan Stenn <stenn@nwtime.org> Tue, 16 August 2022 09:22 UTC

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Date: Tue, 16 Aug 2022 02:21:54 -0700
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To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>, "ntp@ietf.org" <ntp@ietf.org>, Heiko Gerstung <heiko.gerstung@meinberg.de>
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From: Harlan Stenn <stenn@nwtime.org>
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Subject: Re: [Ntp] Antw: [EXT] Re: Quick review of WGLC for status change for draft-ietf-ntp-update-registries
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On 8/16/2022 2:09 AM, Ulrich Windl wrote:
>>>> Harlan Stenn <stenn@nwtime.org> schrieb am 15.08.2022 um 23:53 in Nachricht
> <4f833218-231f-8c47-e529-b3ba00f6554e@nwtime.org>:
> ...
>> So if we're a V4 server and we get a v5 request, we will respond with a
>> v4 packet that says v5.
>>
>> This is consistent with the design.
>>
>> No one has seen a v1 packet format in a very long time.  The v1 stuff
>> folks are seeing now are v[234] packets claiming to be v1.
>>
>> The format of the base packet saw a slight change going from v2 to v3
>> (sync dispersion was replaced by estimated drift rate), and there was
>> (TTBOMK) no change to the base packet from v3 to v4.
>>
>> The change from v2 to v3 caused no problems that I can recall, and even
>> so, I'm unaware of ANY surviving v2 servers out there.
> 
> Well, ntpq 4.2.8p15 is using version==2 when doing mode 6 queries, so there are V2 packets!

What exactly does the version field mean in a mode 6 packet?

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

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