基于SDN的数据中心链路均衡算法研究

The Application of SDN in the Datacenter Networks

针对当前数据中心网络存在链路利用率低,容易产生拥塞以及更新部署新兴业务周期长的缺点。本文将SDN(software define network)架构应用到数据中心网络中,并提出了一种链路负载均衡算法LLB,该算法基于链路的利用率为数据包选择负荷较轻的路径并由控制器以流表的形式下发。试验证明该算法能有效提高链路的利用率,缓解拥塞现象,提高资源利用率。

The link utilization of current data center network is low, prone to congestion and the cycles of update and deploy new service is long. This paper presents SDN （software define network） architecture applied to the data center network, and presents a link load balancing algorithm LLB, the algorithm is based on the utilization of the link by selecting a lighter load.The controller issued in the form of the flow table. Tests show that the algorithm can effectively improve the utilization of links, to ease congestion phenomen and improve resource utilization.