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22.16.9. Adding a Multicast Client Address

To add a multicast client address, that is to say, to configure a multicast address to be monitored for multicast NTP packets, make use of the multicastclient command in the ntp.conf file.
The multicastclient command takes the following form:
multicastclient address
Enables the receiving of multicast messages. Where address is the address to subscribe to. This should be used together with authentication to prevent service disruption.
This command configures a system to act as an NTP client. Systems can be both client and server at the same time.