An optical communication system, the optical node device, and the optical path setting method

In optical networks, without causing a decrease in the optical network efficiency, since it is difficult to reduce the fault recovery upon occurrence of multiple failures, the optical communication system of the present invention, a plurality of operations on the same physical path the backup path for each path, and the optical path setting means for setting a different physical path to each other, when a fault in two or more physical paths of the physical path is generated, the physical path failure has not occurred, disaster optical path setting means for setting a disaster backup path by compressing the bandwidth of the protection path, city optical network and management apparatus, an optical signal by using the backup path information when a fault is the result of the optical path setting means is set during failure with a optical node device provided with the optical transmitting and receiving means for transmitting and receiving, with a city.