| 摘要 |
<p>Frame-transfer functional units (41,42,43,44) function as a switch for transferring a frame to a destination retrieved from a Forwarding Database. In transferring a frame to a ring selecting unit (3), the frame-transfer functional units (41,42,43,44) transfer the frame with the frame added with a header in device. Resilient Packet Ring functional units (21,22) execute processing on an RPR frame received from the other communication device or a frame from the frame-transfer functional units (41,42,43,44) with ring processing functional units (211,221) based on an RPR protocol. The ring selecting unit (3) searches a switch table (35) based on information about the header in device added to the frame with the frame-transfer functional units (41,42,43,44) and the RPR functional units (21,22) to transfer the frame to a retrieved destination. The ring selecting unit (3) can distribute a frame addressed to one port to plural ports.</p> |
