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Re: [Ntp] Antw: Re: Antw: [EXT] NTPv5 Loop Detection without Stratum

Hal Murray <halmurray@sonic.net> Tue, 30 August 2022 20:11 UTC

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To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>
cc: Heiko Gerstung <heiko.gerstung@meinberg.de>, mayer@pdmconsulting.net, mlichvar@redhat.com, "ntp@ietf.org" <ntp@ietf.org>, Hal Murray <halmurray@sonic.net>
From: Hal Murray <halmurray@sonic.net>
In-Reply-To: Message from "Ulrich Windl" <Ulrich.Windl@rz.uni-regensburg.de> of "Tue, 30 Aug 2022 15:22:04 +0200." <630E0EFC020000A10004D2F0@gwsmtp.uni-regensburg.de>
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Subject: Re: [Ntp] Antw: Re: Antw: [EXT] NTPv5 Loop Detection without Stratum
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Ulrich.Windl@rz.uni-regensburg.de said:
> But if the Reference ID for all GPS clocks would be "GPS ", wouldn't he new
> "loop avoidance" algorithm consider all those to be the same source, thus a
> loop? So we could not have redundant GPS sources any more??? 

That (or a variation) could be a feature rather than a bug.  Consider the case 
where some of the GPS receivers have a bug.  The obvious example is 1024 week 
rollover.

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