[ntp:questions] different Ntp servers...

Brian Utterback brian.utterback at sun.com
Sat May 30 19:29:37 UTC 2009

David Woolley wrote:
> Hal Murray wrote:
>> What do they suggest that you do with 2 servers when they
>> give back different answers?
>> Maybe you could take the average?  :)
> ntpd already does that, as long as they don't disagree too much.  Whilst 
> the stratum, and error statistics, are based on just one server, the 
> time is a mix of the time from all the truechimers.

It is only marginally related to how close they are to each other. 
What matters is the dispersion interval for each. If they overlap, 
then the two servers agree. If the dispersion intervals do not 
overlap, then they do not agree and the times will not be combined. 
One or the other will get chosen.

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