基于OpenFlow协议的流表超时机制研究  

Study on Flow Entry Timeout Mechanism based on OpenFlow

作　　者：李默嘉[1] 赖增桂[1] 姜永广[1] 邓伟华[1] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2017年第7期1447-1451,共5页Communications Technology

摘　　要：软件定义网络技术为网络的控制管理带来了更加丰富和高效的手段,但在复杂网络环境中应用软件定义网络技术还面临着一系列问题,而流表超时机制是其中之一。真实网络环境中的业务流持续时间差异巨大,且包含大量单包或持续时间极短的业务流,而不恰当的超时机制可能造成网络资源和计算资源的浪费。因此,针对真实网络环境中的业务流持续时间模型,分析现有超时机制的缺陷,提出了基于Open Flow协议的流表超时机制的改进方案,并通过仿真试验验证了改进效果。Software-defined networking technology brings fairly rich and efficient means to the control and management of the network. However, the application of software-defined networking technology in the complicated network environment still faces a series of problem,Among which is the timeout mechanism for flows. The duration of the flow in the actual is quite different, and usually involves large quantity of single packet or very short duration, and inappropriate timeout mechanism may result in the waste of network resources and computing resources. For this reason and based on the business-flow duration model in the actual network environment, the shortcomings of the existing timeout mechanism are analyzed, proposes, the improved scheme of flow-table timeout mechanism based on OpenFlow protocol is proposed, and simulation and experiment indicate the improvement effect of flow-table timeout mechanism.

关 键 词：软件定义网络 流表 超时机制 持续时间 资源 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]