[ntp:questions] Re: PPS sync: astonishing offset
Hans Jørgen Jakobsen
hjj at wheel.dk
Mon Oct 6 15:35:05 UTC 2003
On Mon, 06 Oct 2003 16:53:30 +0200, Fabien Ribes wrote:
> hi all,
>
> On a router synchronized to a Trimble GPS receiver I'm getting the
> following results with ntpq:
>
> Fri Oct 3 02:24:43 GMT 2003
> remote refid st t when poll reach delay offset disp
>=========================================================================
> +127.127.29.0 .GPS. 0 l 20 32 377 0.00 -0.065 0.49
> o127.127.22.0 .PPS. 0 l - 16 377 0.00 -0.209 0.24
>
> which is OK for me, but one minute later, I get :
>
> Fri Oct 3 02:25:59 GMT 2003
> remote refid st t when poll reach delay offset disp
>=========================================================================
> +127.127.29.0 .GPS. 0 l 2 32 377 0.00 -3.713 0.47
> o127.127.22.0 .PPS. 0 l 2 16 377 0.00 -4.459 0.24
>
> which makes me a bit puzzled, as many other equipments in the same
> configuration are very stable. Any idea ?
>
More data please. Enable peerstat (and loopstat) to get better view of the
problem. What OS? What ntp-version? How long has it been running?
Do you have a drift-file?
/hjj
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