Virtual Network Mapping And Management Using Multi-Controler In Software Defined Networking

Software Defined Networks(abbreviated as SDN) as a new network architecture that can realize the network control plane and data forwarding plane separated from each other and realize the whole network of programmable control, the use of centralized multiple network controllers via standardized interfaces for a variety of basic network device management and dynamic configuration, resource management for the entire network, designed and used to provide more flexibility, making it easier to promote innovation and development of the entire network. Software Defined Networking architecture of network technology embodied in the core were network virtualization and centralized control management.The core problem of network virtualization is the virtual network mapping problem. Virtual network supports multiple network architectures, experimentation and services running on the same shared over the underlying physical network, virtual network mapping problem is how to relate to the limited resources allocated to the underlying physical network as many virtual network, which network virtualization is a key issue. One of the main contents of this study is the virtual network mapping in SDN, we firstly established virtual network mapping model which is based on the Logic Function Blocks(abbreviated as LFB), secondly put out a node ascending CPU demand value mapping programs as well as ascending and descending node selection based on a shared LFB mapping optimization program, then on the proposal carried out simulation experiments. The results show that in terms of cost function block, node descending mapping scheme costs 17.23% less than ascending node mapping scheme, based on the choice of node ascending shared mapping scheme costs 25.62% less than ascending node mapping solution, based on the choice of node descending shared mapping scheme costs 25.34% less than ascending node mapping solution, that's a significant degree of optimization, In this paper, the virtual network mapping conducted in-depth research and improvement of the SDN network theory provides a new reference.Meanwhile, for the traditional network system in the single controller increasingly difficult to freely respond to cyber incidents and requests swelling problems, this paper do some in-depth analysis and research on how to realize multi-controller management in SDN, proposed a effective program about how multi-conducted controllers can manage forwarding nodes well. In-depth analysis of the efficiency and impact of rented control node forwarding nodes and connections based on the parameters deduced specific mathematical model, we summed up the relevant factors affecting the control node for forwarding node management capabilities of the law, is how to achieve more efficient management of the control node to provide a theoretical basis and reference in the SDN network.