A network device includes a first port, a second port, a third port, and an arbitration circuit. The arbitration circuit is configured to receive a first frame and a second frame. The first frame is received from the first port and to be forwarded to the third port. The second frame is received from the second port and to be forwarded to the third port. The arbitration circuit compares a first priority of the first frame and a second priority of the second frame to generate a first comparison result. In response to the first comparison result, first forwarding data is generated based on the first and second frames. The first forwarding data is sent to an output of the arbitration circuit.