The application relates to a configuration system (100) for a wireless communication network (102) that comprises at least one first communication device (104b) and at least one second communication device (104c). The at least one first and second communication devices (104b, 104c) belong to a plurality of communication devices (104, 104a, 104b, 104c, 104d). Each communication device (104, 104a, 104b, 104c, 104d) in the plurality of the communication devices is a radio node device configured to provide a bi-directional radio communication with at least one of the plurality of the communication devices. After receiving(220) a content of a network persistent configuration data (CO) from a communication device (104a) belonging to the plurality of the communication devices and storing(222) the received content of the configuration data, each first communication device (104b) is configured to broad-cast (224) a configuration data description (DE), which comprises a version identifier (VE) of the configuration da-ta, periodically in the network for indicating a capability of said first communication device to send (228) the stored content of the configuration data, which is in accordance with the version identifier, on request.