To configure the local router to operate in broadcast mode, include the broadcast statement at the [edit system ntp] hierarchy level:
- [edit system ntp]
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broadcast address <key key-number> <version value> <ttl value>;
Specify the broadcast address on one of the local networks or a multicast address assigned to NTP. You must specify an address, not a hostname. If the multicast address is used, it must be 224.0.1.1.
To include an authentication key in all messages sent to the remote system, include the key option. The key corresponds to the key number you specify in the authentication-key statement, as described in Configuring NTP Authentication Keys.
By default, the router sends NTP version 4 packets to the remote system. To set the NTP version level to 1, 2, or 3, include the version option.