I appreciate your time David. Thank you. /T "David Woolley" <[email protected]> skrev i meddelelsen news:[email protected]... > Towli wrote: > >> >> why is the root dispertion not "0" when the Dcf77-clock is sitting on >> port 20 on the switch? is 5.45 the time the Dcf77-signal takes to travel >> from Frankfurt to Denmark where i am located? What then does the peer >> dispersion time of 2.84 msec tell me? > > Because: > > - the DCF 77 time wasn't read immediately before you requested the time > from NTP, so the time could have drifted since then. > - I'm not sure, but I think that the best sample might not be the most > recent; > - there is an uncertainty in reading the clock due to the finite > resolution of the clock; > - I think there may be an element of the historic variability thrown in; > - using too low a root dispersion means the error band is very small, so > it only needs a small error to make it impossible to get overlapping error > bands.
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