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[Ntp] ntpv5 draft comments

Doug Arnold <doug.arnold@meinberg-usa.com> Thu, 09 February 2023 22:05 UTC

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From: Doug Arnold <doug.arnold@meinberg-usa.com>
To: NTP WG <ntp@ietf.org>
Thread-Topic: ntpv5 draft comments
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Subject: [Ntp] ntpv5 draft comments
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Here are some comments on draft-mlichvar-ntp-ntpv5-06



In general I continue to support this draft.  I think that Miroslav is going in the right direction and each version keeps getting better.



5.2 The last word of the section, “server” should be “servers”.



5.4 Is there a good informative reference for Bloom filters we could site?



5.5 What does a server do if it supports a discontinuous list of ntp versions.  This might never come up, but if it does, there is no guidance on how to respond to this extension field.



Perhaps the server should list the most recent continuous versions that it supports. If it supports ntp versions 2, 4 and 5, but not 3, then it just reports the range 4 to 5.



5.6. I suggest adding to the sentences: “Note that the correction field is updated as the message is leaving the TC.  This is a one-step TC in the terminology of the Precision Time Protocol [IEEE1588].



I think that this might help clarify the desired behavior for switch/router implementors that have previously added support for ptp.



8. “the next 14 day” should be “the next 14 days”

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