Multilevel stream table priority adjustment method

The invention provides a multilevel stream table priority adjustment method. The method particularly includes implementation steps: firstly, an openflow switch packages matching conditions of stream tables into information, and a controller inquires the statistics information; according to the statistics information, the controller modifies priority of the existing stream tables through a rule base and updates the stream tables of the switch to enable the stream tables of the switch to match with matching information of existing data packets. Compared with the prior art, the multilevel stream table priority adjustment method has the advantages that configuration flexibility of stream table matching domains is effectively improved, stream table matching speed is increased, efficiency of data packet transmission based on stream tables is improved, and high practicality and easiness in popularization are realized.