[ntp:questions] National time standard differences

cc cjcrickmar at googlemail.com
Tue Feb 9 11:00:45 UTC 2010


On 9 Feb, 10:19, David Lord <sn... at lordynet.org> wrote:
> cc wrote:
> > I've setup an NTP server in the south east asia region synchonising
> > with regional NTP servers as well as a couple of servers I am
> > responsible for in the US.
>
> > remote        st t when poll reach   delay   offset  jitter
> > ==============================================
> > +Japan         1 u  454 1024  377   87.402   -0.560   0.056
> > *Japan         1 u  476 1024  377   87.277   -0.810   1.542
> > -NorthAmerica  2 u  427 1024  377  285.387  -17.741   5.084
> > -NorthAmerica  2 u  429 1024  377  307.208  -17.061   0.083
>
> > Is the above delta seen between Japanese and North American time
> > sources purely the delta between the outbound / return network path or
> > something else?
>
> I'd say it is but you don't know for certain where any
> path difference is having an effect, obvious guess is
> the ones with largest delay.
>
> Is it possible (or allowed even) to run "ntpq -p Japan"
> and "ntpq -p NorthAmerica" to check what their billboards
> are.
>
> David
>
>
>
> > Chris

Sure is,

NorthAmerica
remote   refid  st t when poll reach   delay   offset  jitter
==============================================================================
+x.x.x.x .GPS.   1 u  357 1024  377   59.276   -0.524   0.017
*x.x.x.x .GPS.   1 u  414 1024  377   28.865   -0.839   0.032
+peer            2 u  797 1024  377   22.819   -0.566   0.067
-peer            2 u  952 1024  376   23.532   -0.525   0.226

Japan
remote   refid  st t when poll reach   delay   offset  jitter
==============================================================================
*        .GPS.   0 l   57   64  377    0.000   -0.008   0.008
+peer    .GPS.   1 u   23   64  377    1.298    0.007   0.009
+peer    .GPS.   1 u    1   64  377    0.291    0.006   0.013

Chris.




More information about the questions mailing list