Study Of Routing Technologies In Hybrid SDN Network

Network has been the most import infrastructure resource,as the demand and scale has been rapidly expanding.On one hand network reasearchers are encouraged to create new network architecture and protocols.On the other hand because of current network is complexed and closed,today there is almost no practical way for researchers to experiment with new network protocols.For sloving various issues in TCP/IP network,researchers propose the definition of SDN(Software Defined Network).SDN dissociated network configuration from embedded network devices,dividing network into software-based network controller and action-based forwarding devices.Under this architecture,all network resource could be configured and managed by the controller.OpenFlow is a product protocol suits of Software Defined Network.As the forwarding device defined by SDN is totally different from current network devices,which makes difficulty for current network and software defined network coexist.This difference blocks the development of SDN.Aim at sloving this issue,this paper focus on some key technologies used in deploying SDN in current network.Based on these technologies and open source openflow controller-Floodlight,this paper implements the corresponding system,which named Enhanced SDN Routing System.This Enhanced SDN Routing System brings routing capacity into OpenFlow network,making a SDN network could commiucate routing protocol with current network routing device(et router).Then this two different type of network could be connected.As a addon,this paper will propose a way to dynamically manage flow path in openflow network,which make a more blanced network cost and improve the link bandwidth utilization.The first two chapter of this paper describe the background of SDN.The third and forth chapter proposed the requirements,key technologies scheme in hybird SDN environment and Enhanced SDN Routing System design in detail.The fifth chapter by means of different function validate experiment,we prove that this Enhanced SDN Routing System will slove issues in mixed SDN environment.The last chapter summarize this paper and discuss the related work in future.