Do the board development, design the UDP protocol is used for point-to-point straight data (both known IP and MAC), so there is no need to design the ARP protocol, but need to use PC to test in the process of debugging, network debugging assistant to the board before sending UDP packets, total want to query, send ARP packet, lead to debug cannot smoothly, is there any way to make the network card, do not send an ARP request and send directly to the fixed IP and MAC interface card packet?