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CUCM 7.X NTP sync to Windows DC

How do I sync up CUCM 7.x ntp to a windows server? Thx

2 REPLIES
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Re: CUCM 7.X NTP sync to Windows DC

Depending on your Windows version, there are some registry settings you need to set:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NTPServer\Enabled
Changing the ‘Enabled’ flag to the value 1 enables the NTP Server.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type
Change the server type to NTP by specifying ‘NTP’ in the ‘Type’ registry entry.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags
Set the ‘Announce Flags’ registry entry to 5, to indicate a reliable time source.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\LocalClockDispersion

Set 'LocalClockDispersion' to 0

The last one is most important one.

After changing registry, you need to restart "Windows Time" service.

Then you may go to CUCM > OS Administration > Settings > NTP Server to configure the time source(windows DC) address.

Michael

http://htluo.blogspot.com

Hi Michael,I know this is an

Hi Michael,

I know this is an old post but I've just used this on Windows 7 and its worked perfectly, many thanks!

Richard

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