Hello @Irvan Lubis
If you want the switch to act as an NTP server and provide time synchronization to other devices, you need to configure it as an NTP server.
Under configuration terminal:
ntp master <STRATUM-LEVEL>
"NTP uses stratums to define how far away from an atomic clock a given NTP server is. A device getting it’s time directly from an Atomic Clock is said to be stratum 1. A device getting its time from a Stratum 1 server is a Stratum 2, or 1 hop away. The stratum is important because using the stratum NTP can make corrections and align itself more closely with an atomic clock, so that regardless of the stratum level your device is getting it’s time from all devices will be within milliseconds of one another, and that’s some pretty accurate time!" (Source: https://blog.noblinkyblinky.com/2023/07/07/configuring-ntp-on-a-cisco-device/)
Best regards
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