Configuring NTP

#system-config-date

You will get below window:

Check Synchronize date and Time over network.

Click 'Add'

Enter IP as per Question.

Click on the line below that, i.e. white box

After clicking it will start checking whether entered IP is reachable or not. 

Now click on 'Advanced Options' . (Ensure, your added IP is selected before clicking on advance)

Check 'Speed up initial synchronization'.

Click 'OK'