[ntp:questions] Re: Slew mode check for XNTP

Sasikumar Jayaraman sasi05 at gmail.com
Wed Jul 26 12:49:52 UTC 2006

 Thanks much for the info David.

Here is my comments.

I am running XNTP version 4.2.0 as per ntpdc -c version output.
C:\>ntpdc -c version
ntpdc 4.2.0 fr Oct 17 8:50:07 2003 (1)

To confirm that slew mode is not supported in NT, I did the following check.

I changed the system clock ahead of 5 minutes and stoped the NTP Servcie.

Then executed the following commant.

*ntpdate -B ntp01-ams    (This would slew the clock instead of default step

I got the clear message saying -b option is required for Windows NT version
of ntpdate.


C:\>ntpdate -B ntp01-ams
Looking for host ntp01-ams and service ntp
host found : ntp01-ams.lab.net

The -b option is required by ntpdate on Windows NT platforms


Also I tried changing the registry setting to include  -x and -g option.
After to that I changed the system timing and started the ntp service. What
I saw is withing 10 minutes system clock is changed to ntp server clock in
one shot. This is not how slew mode would operate?. Slew mode would take
many hrs to correct simple 3 minutes change. Am I correct?

Can I conclude that slew mode operation is not available for Windows version
of  XNTP?



On 7/26/06, David Woolley <david at djwhome.demon.co.uk> wrote:
> In article <a8e7dcda0607241914i135c4770gf8666d88e16a91c1 at mail.gmail.com>,
> sasi05 at gmail.com (Sasikumar Jayaraman) wrote:
> >       I have using Windows 2000 box which has ntp.conf file for xntp
> xntpd is obsolete.
> > configuration. I would like to confirm that "slewalways yes" is working
> as
> > configured in the ntp.conf file. Could you help me out to verify this?
> There is no such option in ntpd version 4.2.0.   I'm fairly sure that
> it isn't in any later version.  The NTP developers generally consider
> the use of this feature (from the command line "-x") as undesirable.
> I don't believe it existed in version 3 either, but I don't have such
> old source close to hand.
> As far as I know, even the general syntax KEYWORD yes is not used for
> any option.
> > What is the best way to confirm that slewalways is configured and
> working
> > fine.
> Firstly, identify the exact version of the software.  There are also
> Windows ports of the Unix strings utility, that you can use to see if
> the string slewalways appears anywhere in the binary.
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