Method for forwarding protocol frames in spanning rings and a shared node of multi-rings in the Ethernet

摘要

The present invention provides a method for forwarding a protocol frame in spanning rings, applied to the Ethernet ring network including a crossed or tangent ring and sub-ring. The method comprises steps as follows: when an interconnection node of the ring and the sub-ring receives a protocol frame from a sub-ring, if the topology of the sub-ring is changed, the interconnection node updates its address forwarding table according to the address updating information carried in the protocol frame, and sends the address updating information to the ring; the nodes of the ring update their address forwarding table respectively according the updating information. The present invention selectively sends information of sub-ring protocol frame to the ring via the interconnection node of the ring and the sub-ring. Such scheme that information of the sub-ring protocol frame is selective sent at the interconnection node not only solves the problem of updating address in spanning rings, but also decreases the amount of protocol frames sent from the sub-ring to the ring, and thereby greatly improves the performance and efficiency of the network.

主权项

1. A method for forwarding a protocol frame in spanning rings, applied to the Ethernet ring network including a crossed or tangent ring and sub-ring, comprising: when an interconnection node of a ring and a sub-ring receives a protocol frame from a sub-ring, if the topology of the sub-ring is changed, the interconnection node updates its address forwarding table according to address updating information carried in the protocol frame, and sends the address updating information to the ring; and nodes of the ring update their address forwarding table respectively according the updating information,
wherein that the topology of the sub-ring is changed means that status information carried in the protocol frame is not consistent with status information lately recorded by the interconnection nodes, wherein when the status information carried in the protocol frame received by the interconnection node is not consistent with the status information lately by the interconnection node, the interconnection node updates its recorded status information according to the status information carried in the protocol frame received, wherein when the status information carried in the protocol frame received by the interconnection node is not consistent with the status information recorded lately by the interconnection node and the protocol frame does not carry address updating information, the interconnection node ignores the protocol frame and does not forward the protocol frame to the ring, wherein if the status information carried in the protocol frame received by the interconnection node is consistent with recorded status information of previous protocol frame, the interconnection node does not forward information of the protocol frame of the sub-ring to the ring.