[ntp:questions] Standalone Windows XP/7 Machine Needs to Serve NTP

David Taylor david-taylor at blueyonder.co.uk.invalid
Mon Sep 9 18:42:56 UTC 2013


On 09/09/2013 17:20, nospam.swstadel at gmail.com wrote:
> I have a standalone network that can have no connection to the internet.  It is a small network, with one Windows XP or Windows 7 laptop, and several Linux devices all connected through a switch.
>
> The Windows machine needs to have the Linux devices stay on the same time as it.  Accuracy to within about 100 ms is needed.
>
> I cannot add hardware, such as Rubidium clocks, GPS receivers, etc.
>
> I have a software application that will occasionally set the PC clock on the Laptop.  The Linux devices must have the same time.
>
> I thought there would be a simple solution (and maybe there is) using w32time, but the literature I've seen seems to indicate that w32time won't work down to better than 1 second or so.  I wonder if this is strictly true in a situation like mine.  If w32time can be used, it seems like the AnnounceFlags should be set to 0x5, but I wonder how it will work.
>
> Any thoughts?

Install NTP - see:

   http://www.satsignal.eu/ntp/setup.html

It will do what you need, although you will likely need to use orphan 
mode.  I can't help you with that.  Stepping the time on the reference 
PC may cause problems, though, but it would for any time reference 
application.

Adding an Internet connection would make your job a lot easier, though.
-- 
Cheers,
David
Web: http://www.satsignal.eu



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