Qlogic 12000 Series Reference Manual page 133

Switch Command Line Interface
Groups and Commands
NOTE: With no arguments this command displays the current NTP refresh
time, which is the delay in seconds between attempts to sync the
clock via NTP. This value can be configured by using this same
command with the new refresh time (in whole seconds) as the only
argument. The NTP refresh time is not used on line cards or slave
CMUs.
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