[ntp:questions] Ginormous offset and slow convergance

Harlan Stenn stenn at ntp.org
Wed Nov 30 21:30:29 UTC 2011

Pete wrote:
> "David J Taylor" <david-taylor at blueyonder.co.uk.invalid> writes:
> >> Running with an Oncore GPS & a TAPR TAC.  If I "ntpdate -b" a nearby
> >> synchronized server before I start ntpd, the offsets initially look 
> >> pretty
> >> good:
> >[]
> >> Is there anything I can do to decrease the convergence time?
> >Peter,
> >Are you using a drift file, and allowing it to get a good value for the 
> >drift?
> Yes, there is a drift file, and it was properly calculated.

Then in this case if you use iburst ntpd should have your clock fully
sync'd to your upstream server in about 11 seconds' time.  No need to
use ntpdate or sntpd to initially set the clock, just fire up ntpd with
the -g option.


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