In a load balancing
communication device and a load balance management device configuring a load balancing
system, a storage holds, when the device is a load balancing
communication device of a working
system, working communication information of the device itself and protection communication information corresponding to working communication information of another or other load balancing communication devices of the working
system, or holds, when the device is a load balancing
communication device of a redundant system, protection communication information corresponding to working communication information of another or other load balancing communication devices of the working system, and a
processing share management portion instructs, when communication
processing is no longer performed with the working communication information in the load balancing communication device of the working system, a frame processor to perform communication
processing by making the protection communication information corresponding to the working communication information working communication information.