 | | | NTP issue Continued | NTP issue Continued 2007-08-21 - By Stephen Carville
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Andrew.Bridgeman@(protected) wrote:
>
>
>
> I am still having problems getting 40 redhat machines to use ntp and
> synchronise with our Windows 2003 Cluster. I have tried a couple of things
> suggested by people but have had no luck in fixing the issue. It seems
> that
> when I put either the IP of the cluster, the name of the cluster or the
> fully qualified name of the cluster in the config files the ntp service
> communicates with the Windows cluster straight away and all the machines
> are synchronised OK. The problem comes when i leave them afterwards for an
> hour or a day or even a week and look back at the time on the machines and
> they are all different.
>
> I read on the net that the communication used with ntp is UDP over port
> 123
> and was wondering if i have some kind of polling issue after the initial
> start-up of ntp. Does anyone know more detail on how the ntp part works.
> i.e How often does is poll the cluster server for the time or is there a
> way of checking the communication on that port is working.
>
> Any help on this would be much appreciated.
>
> Regards
>
> Andrew Bridgeman
>
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I just tuned into this thread so sorry if anyone has already suggested this:
Windows 2003 does not include NTP by default but rather Microsoft's
stripped down implementation of SNTP whic doesn't always play nice with
others
If your 2003 server is not a DC you may need to set
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders
\NtpServer\Enabled
to 1.
Setting the "Always a reliable time server" (I think) group policy will
sometimes help Windows 2003 trick UNIX systems into synchronizing with it.
Here is Technet article that might help
http://technet2.microsoft.com/WindowsServer/en/library/b43a025f-cce2-4c82-b3ea
-3b95d482db3a1033.mspx
The best solution IMO is to pick a couple of your Linux boxes and set
them up to be time servers for the rest of the network. :-)
--
Stephen Carville <stephen@(protected)>
Systems Engineer
Land America
1.626.667.1450 X1326
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