SDN virtualization platform uplink signaling flow label processing method based on OpenFlow

The invention discloses an SDN virtualization platform uplink signaling flow label processing method based on OpenFlow. The method comprises the following steps: receiving a data packet; a physical switch, when receiving the data packet, first of all, checking the flow meter in the physical switch, and if no items matching the data packet exist in the flow meter, packaging the pack header of the data package in an uplink signaling for sending to a network virtualization platform; the network virtualization platform serving as a controller of the physical switch; the network virtualization platform receiving the submitted data packet; determining whether the data packet carries a flow label; if the data packet carries the flow label, it being indicated that the data packet is a data packet inside a virtual network; and if the data packet does not carry the flow label, it being indicated that the data packet is a non-classified data packet.