SDN (Software Defined Network) government affair network bandwidth limit method and system based on user category perception

The embodiment of the invention provides an SDN government affair network bandwidth limit method and system based on user category perception, and the method comprises the steps: marking a user identity according to a host IP address of a daily office access network of a user, and dividing the user into a plurality of categories; the SDN controller is responsible for counting the total bandwidth use amount of each service category of the user, and differentiating the service forwarding requests exceeding the use limit in combination with a routing mechanism, so that disordered competition of government affair users for network resources can be avoided, bandwidth resource supply of a government affair network is effectively guaranteed, and the service quality of the government affair network is improved. Meanwhile, an effective mode for fine-grained bandwidth resource management among different departments and different posts in the departments is provided. 本发明实施例提供一种基于用户类别感知的SDN政务网络带宽限额方法和系统，根据用户日常办公接入网络的主机IP