[ntp:questions] synchronization distance

David Woolley david at ex.djwhome.demon.invalid
Fri Dec 3 07:51:00 UTC 2010

Atul Gupta wrote:

> Can anyone explain me what is synchronization distance in case of ntp?
> and what is distance exceeded problem?

It's an estimate of the maximum difference between the time on the 
stratum zero source and the time measured by the client, consisting of 
components for round trip time, system precision and clock drift since 
the last actual read of the stratum source.

It most commonly happens because people try to use default 
configurations of w32time as their source.  The default configuration 
has exceptionally long poll times, and doesn't adjust its stratum to 
indicate that it hasn't had an update in days.  (The default 
configuration is also far from full NTP compliance.)

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