Patent ID: 8593942

Claim:
A load balancing communication device of a working system and a redundant system configuring a load balancing system comprising: a storage initially holding: working communication information of the device itself and protection communication information substituted for working communication information of another or other load balancing communication devices of the working system when the device is a load balancing communication device of the working system, or protection communication information substituted for working communication information of at least two other load balancing communication devices of the working system without holding working communication information of the device itself when the device is a load balancing communication device of the redundant system; a frame processor performing communication processing of a frame based on the working communication information; and a processing share management portion; when being informed that communication processing can be no longer performed with the working communication information in the load balancing communication device of the working system where a fault has occurred, the processing share management portion in the another load balancing communication device of the working system instructing the frame processor to perform communication processing with the protection communication information stored for the working communication information of the faulted load balancing communication device, in which the load balancing communication device of the redundant system when being informed that communication processing with the working communication information of the another load balancing communication device of the working system can be no longer performed performs communication processing with the protection communication information stored for the working communication information of the another load balancing communication device of the working system.