Switching device of dual-port ethernet system

摘要

Disclosed is a switching device of a dual-port Ethernet system comprising a media access controller (11) for controlling transmission and reception of a frame through Ethernet so as to decide whether to accept the frame by comparing an IP address of the frame and a preset IP address; a transceiver buffer (15) for transmitting and receiving a frame to and from an upper layer device, the transceiver buffer (15) being connected to the upper layer device through certain buses; a data distributor (13) for receiving a frame from the media access controller and transferring the frame to at least one of the transceiver buffer (15) and a switch buffer (17); the switch buffer (17) for receiving a frame from the data distributor (13) and deciding whether to transmit the frame to a data selector (19) of another media access controller (11); and a data selector (19) for receiving a frame from each of the transceiver buffer (15) and the switch buffer (17) and transmitting the frame to the media access controller (11), the data selector (19) selecting anyone of the frame inputted from the transceiver buffer (15) and the frame inputted from the switch buffer (17) by determining a priority of the frame and transferring the selected frame to the media access controller (11).