PREVENTION OF FRAME DUPLICATION IN INTERCONNECTED RING NETWORKS

摘要

A method for communication includes, in a communication network (20) that includes multiple ring nodes (22) arranged in at least first and second ring networks (24, 28) that are connected by two or more of the ring nodes serving as interconnect nodes (32A, 32B), accepting at the two or more interconnect nodes respective copies of a data packet, which is sent from a source user node connected to the first ring network. An attribute is extracted from the respective copies of the data packet at each of the interconnect nodes, and a predefined mapping function is applied to the extracted attribute so as to select a single interconnect node for forwarding the data packet to the second ring network. A single copy of the data packet is forwarded to the second ring network only from the selected interconnect node, while refraining from forwarding other copies from the other interconnect nodes.