According to an aspect of the embodiments, a node arranged on a ring network, for transmitting a frame from upstream to downstream, the ring network having a plurality of nodes capable of connecting a network apparatus, respectively, the node comprises: a detector for detecting the frame on the ring network; and a frame controller for distinguishing the detected frame whether the frame reaches a final destination, the frame controller stopping the transmitting for the frame when the ring network is lacked of ability to reach the frame to the destination.