Broadcast UDP Communications
With UDP transport protocol ( current Transport Protocol (TP) [setting / parameter ] = 0) it is possible to send and receive broadcast UDP datagrams.
Sending broadcast UDP datagrams. When current Destination IP-address (DI) [setting /parameter ] is 255.255.255.255 the DS sends out its own UDP datagrams as link-level broadcasts i.e. with destination MAC-address of UDP datagrams set to 255.255.255.255.255.255. The DS continues to broadcast its data even if it receives an incoming UDP datagram. In other words, the DS doesn't switch over to the most recent sender as described in UDP data "connections" .
Receiving broadcast UDP datagrams. Whether or not the DS will accept data UDP datagrams sent in the broadcast mode is defined by the Broadcast UDP (BU) setting .