[time-nuts] Re: NIST NTP servers way off for anyone else?

[Steven Sommars]

On Tue, Dec 14, 2021 at 11:40 AM Michael Rothwell <michael at rothwell.us>
wrote:

> I see some high offsets on my local monitoring (synced to time.google.com
> ).
> Especially time-e-b on ipv6.
>

This observation is correct and is caused by queuing delay on the NIST
server.  NIST NTP mode 3 requests
are apparently time-stamped at application level, rather than using
SO_TIMESTAMP or related techniques.
As an exercise, compare the NTP (UDP port 123) and TIME (UDP port 37)
delays.

Steve Sommars