Patent ID: 8488475

Claim:
A fault processing method based on industry Ethernet network comprising exchanging devices that are connected by mutually redundant double links, wherein a work link from the mutually redundant double links is in a working state and a spare link from the mutually redundant double links is in a spare state, the method comprising: detecting states of a connection of the mutually redundant double links between the exchanging devices in the network; and switching the spare link to the work link when the work link is in a fault state and the spare link is in a connection state, wherein: a state of a link from the mutually redundant double links comprises a state selected from the following: the connection state, the fault state and a disconnection state; each of the exchanging device includes at least four ports and connects to an adjacent exchanging device adjacent to the exchanging device via two ports of the four ports; two ports of the exchanging device in the same link are ports in the same ring; two ports of the exchanging device connected to the same adjacent exchanging device are ports in the same direction; and the switching of the spare link to the work link comprises: searching, by the exchanging device, a port in the same direction with a fault port which makes the work link in the fault state; and converting a state of a working port in the work link into a forbidden state and converting a state of a spare port in the spare link into an original state of the work link when the spare link comprising the port in the same direction is in a connection state.