[ntp:questions] Slow convergence of NTP with GPS/PPS

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Fri Oct 24 07:43:51 UTC 2008


>It is more like 20m. And even for 2000km (Vancouver to Regina) on the
>public CanadaNet network it is only 40ms.

The time-of-flight (speed of light) delay doesn't matter (much).
It's mostly a constant.  (Routing shifts on long paths introduce
shifts.)

The problem is queueing delays.  They aren't stable.

-- 
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