The ntp-service disable command disables NTP services.
The undo ntp-service disable command enables NTP services.
By default, both IPv4 and IPv6 NTP services are enabled.
Run the ntp-service disable and ntp-service ipv6 disable commands in the system view, when it is not required for the device to synchronize the clock with IPv4 or IPv6 external servers or peers. The command is also used when the device need not provide the reference clock source for IPv4 or IPv6 external clients.
Disabling of NTP service will not delete the existing configurations.