The broadcast statement places the local server ntpd in broadcast mode. In this mode, the local server periodically sends broadcast messages to clients with a specific address.
broadcast host_addr [ autokey | key] [ version #][ minpoll minpoll][ maxpoll maxpoll]
host_addr
Host address, in dotted notation, which specifies the clients to which the local ntpd daemon is to send broadcast messages periodically. The host address can be the IP broadcast address of a local interface or a multicast address. When the host address is a multicast address, the messages are sent to all local interfaces. The IANA has assigned the multicast group addresses IPv4 224.0.1.1 and IPv6 ff05::101 (site local) exclusively to NTP. You can, however, also use other conflict-free addresses.
autokey
NTP packets are sent and received on an authenticated basis in accordance with the autokey schema. This option and the key option are mutually exclusive.
key
NTP packets are sent and received on an authenticated basis using a schema which is based on symmetrical keys. key specifies the key identifier, the range of values extending from 1 through 65534. This option and the autokey option are mutually exclusive.
version #
Version number for outgoing NTP packets. The possible values for # are 1, 2, 3 or 4.
Default: version 4
minpoll
Integer that specifies the minimum polling interval for NTP messages as 2minpoll seconds.
Default: 6 (64 sec)
Values permitted in BS2000: ≥ 6 (64 sec)
maxpoll
Integer that specifies the maximum polling interval for NTP messages as 2minpoll seconds.
Default: 10 (1024 sec)
Values permitted in BS2000: up to 14 (approx. 4 hours, 30 minutes)