[ntp:questions] Synchronize clocks without a reference clock

Richard B. gilbert rgilbert88 at comcast.net
Mon Mar 19 14:29:40 UTC 2007

Spoon wrote:
> Hello everyone,
> Consider a cluster of computers on a LAN. These computers have no
> acess to a reference clock (no Internet, no GPS, etc).
> One could still want to have all their clocks synchronized, even if
> this means they are all slowly drifting away from the "real" time.
> I've read a FAQ which seems to describe this use case.
> http://www.ntp.org/ntpfaq/NTP-s-refclk.htm#AEN4264
> All I need to do would be to add these lines:
> server        # LCL, local clock
> fudge stratum 12    # increase stratum
> to my configuration file? Did I understand correctly?
> Regards.

That will cause ntpd to serve the local clock.   You can, instead, use 
something called orphan mode in which several machines agree on a 
common, but not necessarily correct, time.  I've never done it.  See the 
documentation for details.

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