[ntp:questions] Fudge time offset on client/peer?
Rich Wales
richw at richw.org
Fri Oct 16 05:05:44 UTC 2009
> you might experiment with the new interleaved mode to see how it
> handles the asymmetry. You could peer your home and work refclock
> ntpds . . . .
Actually, I tried that some time back, but it didn't help a bit.
I eventually came to understand that "xleave" mode is designed to
reduce the effect of processing delays inside a server's network
stack. Sadly, it doesn't do a thing to alleviate asymmetries.
Indeed, my current impression (someone please correct me if I'm
wrong!) is that NTP is *inherently incapable* of measuring (or even
detecting) network latency asymmetries -- the NTP protocol assumes
that traffic "comes" and "goes" with equal speed, and it has no way
to detect situations in which this is not true.
--
Rich Wales / richw at richw.org / richw at stanford.edu
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