所提出的软件定义网络SDN与传统IP网络互联的架构基于以下核心思想:把整体SDN当成一个传统IP网络的“路由器”,由IP网络和该“路由器”通过BGP协议进行域间网络层可达性信息NL-RI的交互,从而使得全网的NLRI经过路由同步后达到一致.在此思想下分析设计了互联架构,对该互联架构进行了模块功能测试、多SDN场景下的仿真和性能测试.仿真结果表明所提出的互联架构可以完成SDN与传统IP网络的互联互通.设计的互联架构对原有网络设备的改动很少,所做的改动集中在可软件编程的控制器上,这有利于本架构在具体网络环境中的实施和部署.%The interconnected architecture of software defined network (SDN) and traditional IP network we propose is based on the following core idea:taking the SDN as a traditional "route".The network layer reachability information (NLRI) of the entire network becomes consistent after "route" communicates with IP network by exchanging NLRI through the border gateway protocol (BGP).We design an interconnected architecture based on the above idea.Besides,we test the models' functions,and verify the validity of interconnected architecture in the multi-SDN scene and the performance.Simulation results show that the interconnected architecture can make the SDN and traditional IP network interconnect and communicate normally.The proposed interconnected architecture makes little change to net work devices,and the changes mainly focus on the SDN controller which is software programmable,and it is helpful for this technology to be deployed and implemented in the real network environment.
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