Abstract: The present invention relates to a redundancy system of routing paths and method thereof. By establishing corresponding routing paths from different ports of routers in a ring network to a terminal in advance and transmitting the identical packet to the terminal by the different ports in the different routing paths simultaneously, the time of reestablishing the routing paths may be saved when one of the routing paths is broken, so as to improve the routing efficiency.

Abstract: In one embodiment of the invention, a redundancy system/method based on the Virtual Router Redundancy Protocol, it includes a master router and at least one backup router preselected. The master router and at least one backup router may have a weight value and Virtual LANs composed of same routing path. A communication representative is chosen from one of the Virtual LANs of each of the master router and the backup router. The communication representative of the master router may continuously transmit the advertisement packet to that of the backup router, and continuously transmit an Address Resolution Protocol table to the backup router. When a communication representative of the backup router doesn't receive the advertisement packet, all the Virtual LANs of the master router will be judged abnormal, and the master router may be replaced, therefore enhance the redundancy switching efficiency and increase the number of the available Virtual LANs.