In a storage system in which storage apparatuses communicatively coupled to a host computer are communicatively coupled to SVPs of the storage apparatuses through a management network, virtual SVPs are configured based on resources of the SVPs, and a maintenance environment for constituent elements of the storage apparatuses is provided through the virtual SVP to a maintenance apparatus accessing through the management network. The virtual SVPs share the information held by the SVPs. The virtual SVP performs maintenance and management of the storage apparatuses through a virtual storage apparatus configured based on the resources of at least two of the storage apparatuses. The virtual SVP acquires a data transmission amount for each communication protocol of a network port from a channel control unit, and sets a bandwidth for each communication protocol of the network port based on the acquired data transmission amount.