This command enables or disables the NTP authentication at global level. If the authentication is enabled, the NTP packets from servers, peers, clients not having MAC is dropped. Only those servers/peers configured with key authentication is considered for time synchronization. Client requests only with authentication is served, whose key-IDs match with one of the trusted key-IDs.
By default the authentication is disabled.
Global configuration mode
The no form of ntp authenticate disables the NTP authentication.
device(config)# ntp authenticate