An apparatus having a corresponding method and computer program comprises a processor; a plurality of ports to transmit and receive packets of data, the plurality of ports comprising a processor port in communication with the processor, the packets comprising broadcast packets and multicast packets; a memory to store a table that associates the processor port with one or more Internet protocol (IP) addresses; and a forwarding engine to transfer the packets between the ports, to transfer each of the broadcast packets to the processor port only when the table associates a target IP address of the broadcast packet with the processor port, and to transfer each of the multicast packets to the processor port only when the table associates a target IP address of the multicast packet with the processor port.