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May 07, 2003 12:00 AM

How can I enable a Network Time Protocol (NTP) server?

John Savill
Windows IT Pro
InstantDoc ID #38909
Rating: (11)

A. All versions of Windows 2000 and later can serve as an NTP server. Other machines on the network can then use the NTP server to synchronize their time. To enable an NTP server, perform the following steps:

  1. Start a registry editor (e.g., regedit.exe).
  2. Navigate to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters registry subkey.
  3. From the Edit menu, select New, DWORD Value.
  4. Enter the name LocalNTP, then press Enter.
  5. Double-click the new value, set it to 1 to enable or 0 to disable, then click OK.
  6. Restart the computer for the change to take effect.

To configure other network computers to use the new NTP server, you must set their NtpServer registry value, which is located under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parametersregistry subkey, to point to the NTP server. For more information about configuring NTP settings, see the FAQ titled "How can I configure the time service in Windows 2000?".

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  • Anonymous User
    7 years ago
    Jan 13, 2005

    The problem with NTP on Win2K and synching with Cisco is that Win2K actually uses SNTP (Simple Network Time Protocil as W32Time) and not NTP. Cisco Devices above 1600 routers all use NTP and a NTP client cannot sync to a SNTP Server. The work around is to replace SNTP on the W2K with an NTP Server (http://www.five-ten-sg.com/util/ntp4172.zip) - SNTP and NTP clients can both sync to a NTP Server.

  • Anonymous User
    8 years ago
    Nov 27, 2004

    well, i tried to sync the cisco routers to the NTP server stated here, no success, i tried a few other NTP daemon for windows, no success either...

    just wondering why there's so whole lot of NTP daemon for Unix that works, why i can't find one that works wonderful for cisco routers on windows? any ideas?

  • pilgrimq
    8 years ago
    Oct 11, 2004

    Can the NTP explained here, work as a time source for cisco switches/routers on a LAN??
    Have tried configuring NTP on our cisco boxes (using “NTP server IP Address”- where A.B.C.D is ip address of win 2000 pc running NTP (configured as stated in above article)
    a few times now....but no breakthrough.
    Would be grateful to hear from anybody whose done so.

  • Mike Schmalz
    9 years ago
    May 12, 2003

    Once that registry value has been changed, the machine doesn't need to be rebooted, all one needs to do is restart the Windows time service and it takes effect immediately.

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