[ntp:questions] ntp-4.2.6p5 on Win 7 x64

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Thu Jul 17 19:29:57 UTC 2014


Nick wrote:
> Both behaved the same.
> Starts off OK but then diverges within 10-15 minutes...
>
> C:\Users\nick>ntpq -pn
>       remote           refid  st t when poll reach delay   offset   jitter
> ==========================================================================
> +83.170.75.28  129.215.42.240  3 u  22  64   17   29.272  1678.03  502.466
> +91.212.90.20  212.83.131.33   3 u  26  64   17   33.001  2234.68  866.070
> +94.125.129.7  195.66.241.10   2 u  29  64   17   29.231  2096.80  754.306
> *87.117.251.3  129.215.42.240  3 u  35  64    7   30.169  2057.24  721.950
-----------------------------------------------^^^
Wait longer, the reach should be 377,
 either that or you are missing packets or somehow losing internet connectivity?

 Does: ntpq -clpe -clas -crv
  show associations with cnt greater than 1, or reach of none or no?


 Starting NTP with -M & -g ?  e.g. ntpd.exe -U 3 -M -g


With that much jitter, either NTP is not disciplining the PC's frequency,
  or something else (another service / application) is yanking the clock around.

 Did you install using Meinberg's installer, or disable w32tm yourself,
  so w32tm is not trying to discipline the PC.

   Check in services.msc that Windows Time Service is "disabled".


 Do you have e.g. An antivirus with an option to set the time enabled?
  e.g. AVG (Advanced Settings -> Update -> Check Computer time, UnCheck)


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