Message processing method, switch device and system

The invention discloses a message processing method. A margin physical switch establishes connection with a controller and acquires address information of the controller, analyzes and records source address information carried by an APP (address resolution protocol) request message, searches address information of the controller in APP table items preset in the margin physical switch according to destination address information carried by the APP request message, takes the searched address information along with a generated APP response message, and returns the APP response message to an OVS. The processing load of a controller in an Open flow network is effectively reduced, and the operating stability of the controller and the network is enhanced. Meanwhile, the invention further discloses a switch device and an Open flow virtual network system.