clock

Set the system clock. More information: https://www.cisco.com/c/en/us/td/docs/ios/fundamentals/command/reference/cf_book/cf_c1.html#clock.

• Enter privileged execution mode:

clock set {{23}}:{{59}}:{{59}} {{31}} {{april}} {{2000}}

• Auto negotiate with the far end of the link, defaulting to active-clock:

clock active prefer

• Auto negotiate with the far end of the link, defaulting to passive-clock:

clock passive prefer

• Show the current clock mode negotiated by the firmware:

clock show interfaces