Windows 10 Windows Time Service - Prioritizing NTP Server Polling

[Gabe808]

Hello,

Thanks for taking the time to read.

I am trying to implement a timing and synchronization solution with my system with external NTP servers.

I have two Airborne Time Code Processors (TCP Box) that gets time from GPS. The boxes are configured as my external NTP servers with ip address 192.168.0.10 and 192.168.0.20.

Ideally, 192.168.0.10 acts as my primary and ONLY timing source, and my NTPClient would poll from 192.168.0.20 if and only if the my primary source failed.

I set Registry Entry NTPServer with: 192.168.0.10,0x1 192.168.0.20,0x2

As far as I know, 0x1 is a special interval flag and 0x2 is UseAsFallbackOnly flag.

I had high hopes that UseAsFallbackOnly would help me prioritize which ntp servers I poll from. However, when I disconnect the primary ntp server from my system, the polling source never switches to my secondary source.

Does anyone know of a good way to set multiple ntp sources, specifying one as a primary and one as a backup?

Thanks,

Gabe

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