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Re: [Ntp] Antw: Re: Antw: Re: Antw: [EXT] Re: New Version Notification for draft‑gruessing‑ntp‑ntpv5‑requirements‑03.txt

Martin Burnicki <martin.burnicki@meinberg.de> Fri, 22 October 2021 09:25 UTC

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Date: Fri, 22 Oct 2021 11:24:50 +0200
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To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>, mlichvar@redhat.com, halmurray+ietf@sonic.net
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From: Martin Burnicki <martin.burnicki@meinberg.de>
Organization: Meinberg Funkuhren GmbH & Co. KG, Bad Pyrmont, Germany
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Subject: Re: [Ntp] Antw: Re: Antw: Re: Antw: [EXT] Re: New Version Notification for draft‑gruessing‑ntp‑ntpv5‑requirements‑03.txt
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Ulrich,

Ulrich Windl wrote:
[...]
> So the assumption is that only stratum-1 servers do leap smearing and higher strati even when seeing a leap announcement do "jump"? Or are they expected to ignore the leap announcement? Or do the smearing servers keep the leap announcement for themselves (not pass it on)?
> Thinking about it that would demand that a smearing server always indicates "no leap" (LI==00) to ist clients as it actualy converts the leap event (taking one second) to a "smearing interval" (taking hours).

It's actually the case that ntpd (at least from ntp.org) does *not* set 
the leap second warning bit if it is smearing the time to hide the leap 
second from downstream nodes.

That's the original intention of leap smearing.


Martin
-- 
Martin Burnicki

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