[ntp:questions] Re: win32 undisciplined local clock sync time

TJ Horlacher tj at infigo.net
Fri Nov 18 03:55:06 UTC 2005

"Skunk Worx" <skunkworx at verizon.net> wrote in message 
news:d9cff.18234$rO4.9489 at trnddc05...
> Hello,
> I am new to NTP. I have a windows server and linux clients.
> My server is win2003 setup with meinberg's 
> ntp-4.2.0b at 20051016-1.1417-o-win32-setup.exe
> The clients are all Fedora Core 4 linux, Fedora ntp version is 
> ntp-4.2.0.a.20040617-8
> I've setup the ntp.conf on the server with :
> driftfile "C:\Program Files\NTP\etc\ntp.drift"
> server prefer
> fudge stratum 8 refid NIST
> disable auth
> per the document at :
> http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver1.html
> Also I have verified that the "-g" option is in the win32 service startup.
> Here are my questions:
> 1) The service on the win2003 box takes 2-3 minutes to drop from stratum 
> 16 to stratum 9. The linux boxes won't sync to stratum 16, so I have to 
> wait several minutes between booting the server and the clients. Is there 
> a way to make the win32 box sync faster?

Try using iburst option... It will then sync quickly.
server mytimeserver.com iburst

> 2) If I reboot the linux clients after a couple of days I get a "too long 
> without sync" message, and the service on the win2003 box has to be 
> restarted, with another wait of 2-3 minutes to drop from stratum 16 to 
> stratum 9, then reboot the linux clients. Is there a way to configure the 
> linux NTP daemons to sync to the server even though the server has aged?

Try use iburst option for clients as well.

> 3) Are IRIG sync'd rackmount NTP servers commonly available? I plan on 
> putting one in the lab and leaving it on all the time as a possible 
> solution (but see the next question...)
> 4) True NIST-traceable time is not important to me, relative time is. I've 
> heard about some plans for an "orphan mode" NTP server configuration. Is 
> this in the meinberg exe and/or are there plans to release such a 
> capability at some point?
> Any other comments or suggestions are welcome.
> Thanks in advance,
> John 

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