Semi-centralized SDN Routing Technology Based on Data Center Network

In large-scale data center network, the controller is the main factor affecting network performance., and the router and flow table calculation should be processed by the central controller. Therefore, in order to prevent the occurrence of system problems, researchers put forward the semi-centralized SDN routing technology with data center network as the core. In essence, all SDN switch nodes included in this technology do not need to be processed by the controller, and can build their own basic flow table, which helps SDN switches to directly forward data, while the controller can be used to control the burden of the system during operation. The performance test analysis of this system shows that it can not only effectively reduce the load of controller, but also effectively recover the fault, so it is the focus of the research of digital center network technology.