The destination address field is 6 bytes in length. The least significant bit of the destination address is used to determine if the address is an individual/unicast (0) or group/multicast (1) address. Multicast addresses are used to group logically related stations.
The broadcast address (destination address field is all 1s) is a multicast address that addresses all stations on the LAN. The AXI Ethernet Lite MAC supports transmission and reception of unicast and broadcast packets. The AXI Ethernet Lite MAC core does not support multicast packets. This field is always provided in the packet data for transmissions and is always retained in the receive packet data.
Note: The AXI Ethernet Lite MAC design does not support 16-bit destination addresses as defined in the IEEE 802 standard.