基于网络流量特征的软件定义网络流表项超时时间优化技术

基于网络流量特征的软件定义网络属于新型的网络架构,在实际应用中能够分离网络数据平面,并在集中式控制器配合下对网络进行编程,因此将其应用到流表项超时时间设置中能够提升流表中数据流的管理控制效果,降低数据流匹配失败率,改善流表空间利用率。该文主要对软件定义下网络流表项超时时间进行优化设计,并通过实验分析数据流数目、流表容量对数据流匹配率的影响,从而更好地运用对数正态分布规律运算实现超时时间的动态调整。

The software-defined network based on network traffic characteristics belongs to a new type of network architecture,which can separate the network data plane in practical application and program the network with the cooperation of centralized controller.Therefore,applying it to the timeout setting of the flow table can improve the management and control effect of the data flow in the flow table,reduce the failure rate of data flow matching,and improve the utilization of the flow table space.This paper mainly optimizes the timeout time of the network flow table under the software definition,and analyzes the influence of the number of data streams and the capacity of the flow table on the data flow matching rate through experiments.Thus,the operation of lognormal distribution can be better used to realize the dynamic adjustment of timeout.