[time-nuts] ISS NTP operation problems.

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Jan 8 15:33:33 UTC 2021


--------
Hal Murray writes:

> NTP likes symmetric delays.

That's strictly speaking to true:  NTP *assumes* symmetric delays.

If your path is not symmetric, you can a time offset of half the asymmetry.

If your path is stable you can calibrate that out with a temporary reference
or something.

If you path is not stable, or you flip between different servers with different
delays and/or assymetries, your time will not be stable.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.




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