Data flow monitoring and control of LAN based on strategy

The data stream visit rule and switches port mirror is defined, and binding relation and strategy of flow control is associated, and the data flow monitoring and control system of LAN is established through the advanced configuration of the third layer switches. The effective control of different data flow in LAN is achieved through strategy control of corresponding ports using Ethereal to capture data packets and analyze flow. The concept of cross entropy is introduced and the relation of network flow and capacity based on cross entropy is put forward to simulate and analyse the influence of the probability of normalized flow in LAN on network performance.