The invention relates to a system for managing (1) a communication network (W) of a vehicle, said management system (1) comprising a plurality of computers (10, 20) connected to said network (W), and a two-way wired link (L) connecting said plurality of computers (10, 20), said network (W) having a standby state and an awake state, said plurality of computers (10, 20) comprising a master computer (10) and at least one slave computer (20), said master computer (10) and said at least one slave computer (20) being configured to emit and receive a message relative to a requested state of the network (W) via said two-way wired link (L), the state of at least one of the plurality of computers (10, 20) being controlled from said message relative to the requested state, so as to monitor the state of the network (W), said communication network (W) being a fiber-optic Ethernet network.