i want to use the harware calendar of a 3925 router as a ntp server for the lan and i was wondering if the < NTP master > command is all i need? Or that command referce to the software clock . Im a little confused about that.
you can use the command ntp update-calendar for the hardware clock as per:
This way the hardware clock is synced from the ntp source.
If you want to sync the hardware clock from the software clock, then the command you can use is:
Yes, you only need ntp master and the stratum level you want to assign to it.
Example: router(config)# ntp master 2