Research On Algorithm Of Switch Flow Meter In Software Defined Network

With wisdom city and the rapid development of Internet,the mobile terminal of the Internet and PC cluster network has become an indispensable part of people in the study,life and work,but in recent years,big data and the emergence of new network technology such as computer network to break the pattern of traditional computer network.Network scale and application layer software business is in a strong rise,make the network of north and south,east and to the traffic and information interactive software and hardware requirements for the network switch equipment increases,the traditional network switch matching structure is no longer in redundant complex large-scale network expansion in a closed network.In order to meet the requirement of the Internet applications and to solve the traditional Network architecture,introduced the Software Defined Network(Software Defined Network,SDN),SDN is a completely new and more accord with the contemporary development of the Network architecture,its core idea is from the traditional switch to specific business through detailed classification,separate the data forwarding plane and the routing control plane.OpenFlow switch is the basis of the forward aspect of SDN unit structure,as well as the level of packet forwarding of main equipment,its performance will directly affect the differences of the network to the user experience,and OpenFlow switch work process flow chart of the matching,and SDN forward its level of decision-making mechanism is the core of the architecture.Although the OpenFlow switch,based on the new network,is suited to the needs of today’s web development,there must be a researchable problem that can be optimized and even improved.The storage space and matching speed of its switches are being watched by academics and industry.The optimization and improvement of switches promoted the rapid development of the SDN network,and also promoted the closeness of the Internet and human information.This paper presents the matching structure of the f-openflow switch based on the TCP/IP matching field hierarchy concept.First of all,respectively for packets and OpenFlow switch rule flow table hierarchy of classification,after get the result of the former two matching,the matching process conditions and restricting factors involved in more,this article is to hit ratio,length and percentage and yuan length of three groups of certain conditions the simulation environment.The f-openflow match is a reference to an experiment that matches the original OpenFlow of SDN with both.Under normal circumstances,between the two different,but with the development of the network packets would be more complex and its length will increase,so the F-OpenFlow may be more suitable for present or future network development demand.