Configuration restrictions and guidelines
When you configure NTP, follow these restrictions and guidelines:
You cannot configure both NTP and SNTP on the same device.
Do not configure NTP on an aggregate member port.
The NTP service and SNTP service are mutually exclusive. You can only enable either NTP service or SNTP service at a time.
To avoid frequent time changes or even synchronization failures, do not specify more than one reference source on a network.
Make sure you use the clock protocol command to specify the time protocol as NTP. For more information about the clock protocol command, see Fundamentals Command Reference.