Re: [Ntp] Antw: Re: Calls for Adoption -- NTP Extension Field drafts -- Four separate drafts

Daniel Franke <dfoxfranke@gmail.com> Mon, 02 September 2019 12:37 UTC

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From: Daniel Franke <dfoxfranke@gmail.com>
Date: Mon, 2 Sep 2019 08:37:13 -0400
Message-ID: <CAJm83bDSLuFif7k3nofsq8ZxzC7GVE181fcXmQALVNZAEC=9fg@mail.gmail.com>
To: Harlan Stenn <stenn@nwtime.org>
Cc: Heiko Gerstung <heiko.gerstung@meinberg.de>, "ntp@ietf.org" <ntp@ietf.org>
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Subject: Re: [Ntp] Antw: Re: Calls for Adoption -- NTP Extension Field drafts -- Four separate drafts
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On Mon, Sep 2, 2019 at 8:30 AM Harlan Stenn <stenn@nwtime.org> wrote:

> Similary, a v4 system that gets a v5 (or greater) packet, the v4 system
> should respond with a v4 packet.

If a v4 server gets a v5 packet and doesn't know anything about v5,
then how can it know that it's parsing the request correctly or
understand its semantics well enough to give a meaningful v4 reply?
Servers should not respond at all to packets with unrecognized
versions.