Patent ID: 8184650

Claim:
A method of filtering redundant frames including a MAC source address, a frame ID and a CRC value, in a network node with two ports, each port including a transmitting device and a receiving device, the transmitting device including a transmission list in which frames to be transmitted are stored, and the receiving device including a receiving memory for storing a received frame, the method comprising: receiving a first frame from a network by a first one of the two ports; and after reception of the MAC source address and the frame ID of the first frame, seeking a second frame in the transmission list of the first port, the second frame including the same MAC source address and frame ID as the first frame, wherein, when the second frame is present, the first frame is not forwarded to a local application and is not forwarded to any other ports of the node, and the second frame is not forwarded on the network by the node; wherein, after the receiving of the first frame, if the second frame is not present in the node, and if the first frame is not exclusively destined for a local application, then the first frame is forwarded on the network by the node.