Patent ID: 8761052
Filing Date: 2014-06-24
Classification: H04L

Abstract:
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.