Cisco Unified MeetingPlace, Release 7.0 -- Configuring the Web Server to Synchronize with an NTP Server

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Cisco Unified MeetingPlace Web Conferencing automatically sets up the Windows operating system to use the Windows Time Service to synchronize its clock with the NTP server. This keeps the Web Server synchronized with the Cisco Unified MeetingPlace Application Server.

You can also configure the Web Server to synchronize with an alternate NTP server. However, we recommend that all components in a Cisco Unified MeetingPlace system use the Application Server as their NTP time source.

Caution! Do not manually adjust the clock on the Web Server computer. Doing so could cause the Web Server to crash. To make a one-time manual adjustment, stop the Cisco Unified MeetingPlace Web Conferencing master service and restart it.

NOTE: When you restart the Web Server, all manual changes made to the registry are lost.

Note: If the time is not properly synchronized between the Web Server and the Application Server, web recordings may be either completely silent or the audio and web conferencing portions of a web recording will not be timed correctly.


Before You Begin
  • Be aware of the following:
    • By default, NTP uses UDP port 123. If your Web Server is in the DMZ and your Application Server is not, you will have to open UDP port 123 in your firewall for the default NTP configuration to work. The default configuration is the Web Server synchronizing with the Application Server as the NTP server.
    • If you decide to use an alternate NTP server for your Web Server time synchronization, make sure that your NTP setup keeps the Cisco Unified MeetingPlace Application Server and Web Server perfectly synchronized. If the two servers are not time synchronized, certain features will not work.


Do not adjust the clock on the Windows computer while the web conferencing application is running.

  1. Double-click the Window Time icon on the Windows system tray.
  2. Select the Internet Time tab.
  3. Select to automatically synchronize with an Internet time server.
  4. Specify your server name inside the Server: field.

Related Topics

What to Do Next

We highly recommend that you manually verify that the clocks on the Cisco Unified MeetingPlace Application Server and your Web Server are synchronized. Use the date command on the Application Server to obtain the current date and time.

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