Ring network, communication device, and operational management method used for the ring network and communication device

摘要

Frame-transfer functional units function as a switch for transferring a frame to a destination retrieved from an FDB. In transferring a frame to a ring selecting unit, the frame-transfer functional units transfers the frame with the frame added with a header in device. RPR functional units execute processing on an RPR frame received from the other communication device or a frame from the frame-transfer functional units with ring processing functional units based on an RPR protocol. The ring selecting unit searches a switch table based on information about the header in device added to the frame with the frame-transfer functional units and the RPR functional units to transfer the frame to a retrieved destination. The ring selecting unit can distribute a frame addressed to one port to plural ports.