Enabling NTP

To enable NTP, use the ntp command in global configuration mode. This command enables the NTP client mode and server mode.

device(config)# ntp 
device(config-ntp)#

Use the no form of the command to disable NTP and remove the NTP configuration.

Note: The no ntp command removes all the NTP configuration configured statistically as well as learned associations from NTP neighbors.
Note: If NTP is enabled, to be in compliance with Common Criteria, NTP authentication must also be configured as described in the following sections.