[ntp:questions] Issues with w32tm on AD network

Martin Burnicki martin.burnicki at meinberg.de
Fri Feb 22 08:31:38 UTC 2008


Andrew,

Andrew Hodgson wrote:
> Hi,
> 
> I have had issues keeping accurate time on W32tm using an Active
> Directory based network with just Windows servers.  I have a Linux
> workstation, and NTP on that workstation keeps loosing the time, and
> going to Stratum 16.  Similarly, there are Cisco routers on the
> network, which also do likewise.
> 
> I am using the NTP pool, but have done this for years on a Linux
> system with no problems.
> 
> Should I think about switching to NTPD on Windows, and if I do this,
> will it cause an issue with both this and W32tm running at the same
> time?

Though it's normally preferable to run ntpd rather than w32time, there is a
limitation if you run ntpd on a domain controller:
The domain members (workstations) will stop detecting the domain controller
automatically as their primary time source, so you'll have to configure the
domain controller explicitely as times source on every client.

If you also run any Linux or other *ix server then a better approach would
be to let the *ix machine synchromize to the pool servers, and configure
the *ix machine as "internet time source" for w32time on the domain
controller.

You should not let real NTP clients use w32time as time source, though.

Martin
-- 
Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont
Germany




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