What's the version of CUCM??What's the status of the NTP on the CUCM OS page.
Make sure you are able to ping the router from CUCM.
You can try rebooting the publisher to make sure the server synchs with the router.Seen several times that after rebooting the servers on the cluster the time goes in synch.
If you are using Unified Communications Manager here are the steps to configure NTP:
Here are the steps on how to configure NTP servers:
NTP Servers Ensure that external NTP server is stratum 9 or higher (1-9). To add, delete, or modify an external NTP server, follow this procedure:
Note : You can only configure the NTP server settings on the first node or publisher.
Procedure 1. From the Cisco Unified Communications Operating System Administration window, navigate to Settings>NTP Servers. The NTP Server Settings window displays.
2. You can add, delete, or modify an NTP server: - To delete an NTP server, check the check box in front of the appropriate server and click Delete. - To add an NTP server, click Add, enter the hostname or IP address, and then click Save. - To modify an NTP server, click the IP address, modify the hostname or IP address, and then click Save.
Note : Any change you make to the NTP servers can take up to five minutes to complete. Whenever you make any change to the NTP servers, you must refresh the window to display the correct status.
3. To refresh the NTP Server Settings window and display the correct status, choose Settings>NTP. Note : After deleting, modifying, or adding NTP server, you must restart all the other nodes in the cluster for the changes to take affect.
Now, if everything seems to be fine you can also try running through CLI the next command to check the status and config:
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