[ntp:questions] Re: Synching all client machines to 1 server all on the same LAN

Brian Utterback Brian.Utterback at Sun.removeme.COM
Mon Nov 17 16:39:55 UTC 2003

Kevin Birkett wrote:
> Hello,
> I have been working with NTP for 2 days trying to synchronize several client 
> machines to 1 server.  I would like to do this with multicast since we use 
> DHCP and the server IP addr could change.  It seems as if it would be simple 
> to configure a broadcast on the server, and then a multicastclient on each 
> client machine.  However, I can't get the times to sync up.
> Here is the Server ntp.conf file:
> logconfig all
> logfile /etc/ntpd.log
> broadcast
> server
> fudge stratum 10	
> driftfile /etc/ntp/drift

You need to add the "prefer" keyword on to the server line. The NTP
daemon will not generate broadcast packets based on the "LOCAL" refclock
without this extra step.


Lesson from the blackout of 2003:
The power grid is THE most critical infrastructure, upon which all
others depend, and nobody really knows how it works.
Brian Utterback - Solaris Sustaining (NFS/Naming) - Sun Microsystems Inc.,
Ph/VM: 781-442-1343, Em:brian.utterback-at-ess-you-enn-dot-kom

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