[ntp:questions] Re: ntpd Not Converging

Steve Kostecke kostecke at ntp.isc.org
Fri Nov 4 15:12:55 UTC 2005

David J Taylor wrote:

> David T. Ashley wrote:
>> When ntpd starts and the server time is off of the true time by
>> an offset (say, 2 seconds), what "control law" does it apply to
>> reconverge the server's time and the true time?
> A simple answer would be:
> - if the clock is off by a large amount, it is first stepped

The default setting it to step the clock for offsets of more than 128
milliseconds and initiate a slew for offsets of less than 128 ms.

Offsets exceeding the panic limit (1024 seconds by default) cause ntpd
to abort. Use of the '-g' command-line option will allow ntpd to exceed
the panic limit once.

Steve Kostecke <kostecke at ntp.isc.org>
NTP Public Services Project - http://ntp.isc.org/

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