To appropriately manage the total sum of bands provided to each layer, on the basis of the physical band of an information network, wherein the priorities of frames transceived among communication nodes are hierarchicalized.

In the information network, including a plurality of RPR stations connected via RPR rings 10 wherein a user makes information communication via routers 60 each connected to each RPR station 20, a management information network 13 for managing a plurality of the RPR stations 20, collects and monitor-setting states of a CIR associated with all of class A (sub classes A0, A1) and a class B in the individual RPR stations and manages the total sum of all the CIRs of the classes A, B in all the RPR stations 20, such that the total sum will not exceed the physical Ring band of the RPR rings 10.