校园专网中基于SDN的路径选择与带宽保障策略

PATH DETERMINATION AND BANDWIDTH GUARANTEE STRATEGY BASED ON SDN IN CAMPUS NETWORK

校园专网中的重要业务需要足够的带宽以保障其服务质量。Open Flow仅设置端口队列忽略了总带宽需求超过链路容量的情况,OPPBG(Open Flow-Based Path-Planning with Bandwidth Guarantee)算法无法区分多个业务。针对这种情况,提出一种基于SDN(Software Defined Networking)的路径选择与带宽保障策略。算法首先删除不满足带宽需求的链路,随后通过路径选择过程获得最佳路径,最后沿该路径为各业务设置交换机端口队列用于调度转发。实验结果表明,重要业务的各自带宽需求均能得到满足。该算法能有效提升专网服务质量,防止重要业务受现有流量及未来流量干扰,提升网络性能和健壮性。

Important businesses in private campus network need sufficient bandwidth to guarantee their quality of service.Simply setting port queue ignores the possibility of total bandwidth requirement exceeding the link capacity,and OPPBG(OpenFlow-Based Path-Planning with Bandwidth Guarantee)algorithm cannot distinguish multiple businesses.In view of this,we proposed a path determination and bandwidth guarantee strategy based on SDN(Software Defined Networking).The algorithm first deleted the link that did not meet the bandwidth requirement and then obtained the best path through the path selection process.Finally,the switch port queue was set for each service for scheduling and forwarding along the path.The experimental results showed that the bandwidth requirements of each important business were satisfied.This algorithm effectively improved the service quality of the private network and prevented important services from interfering with existing flow and future flow and improved network performance and robustness.