[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/




More information about the questions mailing list