Changing the SNTP poll interval (CLI)
Syntax:
sntp <30..720>
Specifies the amount of time between updates of the system clock via SNTP. The default is 720 seconds and the range is 30 to 720 seconds. (This parameter is separate from the poll interval parameter used for Timep operation.)
Example:
To change the poll interval to 300 seconds:
switch(config)# sntp 300