ntp server — global
interface] no ntp server
Network Time Protocol (NTP) service
This command tells the router which NTP server to use. The router derives its time from the server but does not try to update the server’s time.
The IP address of the NTP peer.
The NTP version (1 through 3). The default is 3.
Authentication key to use for this peer. The
ntp authentication-key command defines the keys and their key IDs.
The interface the router should use to communicate with this server.
The following command sets our NTP server to 10.11.1.5:
ntp server 10.11.1.5 version 2