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Re: [Ntp] Symmetric mode

Hal Murray <halmurray@sonic.net> Fri, 30 September 2022 20:30 UTC

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To: Doug Arnold <doug.arnold@meinberg-usa.com>
cc: Hal Murray <halmurray@sonic.net>, "ntp@ietf.org" <ntp@ietf.org>
From: Hal Murray <halmurray@sonic.net>
In-Reply-To: Message from Doug Arnold <doug.arnold@meinberg-usa.com> of "Fri, 30 Sep 2022 14:23:22 -0000." <AM7PR02MB5765D115CABA9E9B5A148711CF569@AM7PR02MB5765.eurprd02.prod.outlook.com>
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Subject: Re: [Ntp] Symmetric mode
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doug.arnold@meinberg-usa.com said:
> Please enlighten me. I've been reading the discussion on symmetric ntp, a
> nd I don=92t understand the purpose. An ntp server can ask other servers for
> time using client server ntp, and use that information to examine its own
> time and that of the peer it is looking at.  Why is a different over-the-wire
> version of the protocol needed? 

That's what we are trying to figure out.

Miroslav's draft for NTPv5 dropped symmetric mode.  Some people think it is 
interesting but they haven't managed to convince some others of us that it is 
important.



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