| 摘要 |
The present invention can reestablish a communication path between two packet ring networks through another packet ring network even if a fault occurs therebetween and can prevent occurrence of broadcast storm or the like. Therefore, a packet ring network system of the present invention includes a plurality of packet ring networks to which nodes are brought into ring form connection so that a packet inside a ring obtained by encapsulating a client packet, which a terminal outside the packet ring network transmits, is transmitted and received in a packet ring network, wherein, a first packet ring network is included; a plurality of subpacket ring networks connected to the first packet ring network through an interlink used for client packet transport therebetween is included; the interlink is provided to each of the subpacket ring networks connected to the first packet ring network; the first packet ring network and each of the subpacket ring networks include an interlink node connected to an interlink; each of the subpacket ring networks is connected to another subpacket ring network through a bypass pathway used for client packet transport when a fault occurs in an interlink; each of the subpacket ring networks includes a bypass pathway node connected to a bypass pathway to another subpacket ring network, and the bypass pathway node starts transport of a client packet with a bypass pathway in the case where a fault occurs in an interlink between a subpacket ring network to which a self-node belongs and a first packet ring network or in an interlink between a subpacket ring network to which a bypass pathway node connected to the self-node through a bypass pathway belongs and the first packet ring network.
|
