Research On The Scheduling Method Of Software Defined Optical Network In Data Center

Nowadays data centers are used to provide end-users with vast applications and services. Data center in the process of evolving architecture continue to raise new demands on the data center network, the traditional data center network can not adapt to the development of the data center, as a bottleneck restricting the overall development of the data center.Future trends in the data center network are moving toward software-defined networks (SDNs), combining resource virtualization and distributed cloud-based control and management technologies. Software defined Network (SDN) has become one of the hotspot technologies in communication and IT field. SDN is a new type of network architecture.Its core idea is that the control plane of the network and the data forwarding plane are decoupled and decoupled so as to realize the programmable software control of the network resources. Software-defined Optical network architecture is an application of SDN in optical networks. SDN optical equipment supporting OpenFlow protocol and virtualization technology (such as virtual machine migration and resource management)of the data center can provide various abstraction layers for data center physical resources, provide effective network management tools for data center managers, The system's global vision, in order to facilitate network management.In this paper, a method of optical resource provisioning based on the topology of the electrical network is presented. By using this method, a hybrid network architecture based on the fat tree network is designed. TheSDN architecture and OpenFlow protocol are designed and implemented.Connection management, topology management, traffic monitoring module. In order to solve the problem that OpenFlow protocol is not supported by traditional network devices, a set of OpenvSwitch-based network device agents is developed to realize the conversion between OpenFlow protocol and private protocol, thus realizing unified control of the network. The test results show that this scheme can effectively realize the fusion and cooperation of the optical network and the electric network,reduce the working load of the electrical network and enhance the overall performance of the network. The network based on the software defined architecture The good programmable characteristic, and can realize the network resources the virtualization and the unified flexible dispatch.Through the calculation of energy consumption, the energy efficiency of the scheme is superior to the traditional fat tree network.