消除OpenFlow网络中UDP冗余控制分组的机制  

Mechanism of eliminating UDP redundancy control packets in Open Flow network

作　　者：胡慧 陈鸣 刘波 许博 邢长友 胡超 HU Hui;CHEN Ming;LIU Bo;XU Bo;XING Chang-you;HU Chao(College of Command Information Systems, PLA Army Engineering University, Nanjing 210007, China;College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;Key Laboratory of Computer Network and Information Integration, Southeast University, Nanjing 211189, China)

机构地区：[1]陆军工程大学指挥信息系统学院,江苏南京210007 [2]南京航空航天大学计算机科学与技术学院,江苏南京211106 [3]东南大学计算机网络和信息集成教育部重点实验室,江苏南京211189

出　　处：《通信学报》2017年第9期167-175,共9页Journal on Communications

基　　金：国家重点基础研究发展计划("973"计划)基金资助项目(No.2012CB315806);国家自然科学基金资助项目(No.61379149);江苏省科技计划基金资助项目(No.BY2013095-1-06);江苏省自然科学基金资助项目(No.BK20140070);复杂电子系统仿真重点实验室基础研究基金资助项目(No.DXZT-JC-ZZ-2015-018)~~

摘　　要：无连接的UDP数据流产生的大量冗余控制分组会对SDN控制器和网络产生严重的性能影响。首先,测试并建模分析了冗余控制分组对控制器性能的危害,进而形成了解决该问题的基本思路。由此提出一种基于预装流表并滤除冗余分组(PFFR,preinstalling flow-tables&filtering redundant-packets)机制。PFFR通过预装转移流表项限制UDP控制分组的初始速率,并通过按路径安装流表和冗余分组滤除算法快速消除冗余控制分组。实现了基于PFFR的原型系统并进行了测试,结果表明,PFFR方法能够有效提升控制器的性能。Large numbers of redundant control packets produced by connectionless UDP flows may engender serious influence over the performance of the SDN controllers and networks.The endangerment of the redundant control packets for the performance of SDN controllers by testing and modeling was firstly analyzed,and then a basic solution to solve the problem was formed.Therefore,a preinstalling flow-tables&filtering redundant packets(PFFR)mechanism was proposed.By preinstalling flow tables,PFFR limited the initial rate of control packets in UDP flows,and through installing flow tables according to paths and utilizing the redundant packets filtering algorithm,PFFR eliminated redundant packets rapidly.A prototype system based on PFFR was implemented and tested.The experimental results prove that the PFFR mechanism can effectively improve the performance of the controller.

关 键 词：OpenFlow 控制器 UDP流 冗余分组 预安装流表 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]