Research On Dynamic Switching Technology Of SDN-Based Virtual Network

With the development of Internet,more and more technical elements have been added to the hardware for carrying data forwarding and exchange.This action makes the load of hardware gradually heavier,which not only brings difficulties in implementation,but also increases the difficulty of network maintenance and restricts the development of the network.For this reason,the birth of a new network architecture SDN(Software Defined Networking)liberates the hardware.As a new network mode,SDN separates executive forwarding and control decision-making,simplifies network control and management,and has a broad application prospect.In addition,in the process of data growth,the problem of network energy consumption has gradually attracted people's attention.At present,there is not much research in this area,mainly through reducing the energy consumption of hardware equipment or designing a new routing mechanism.Firstly,through the research of SDN technology and reducing energy consumption and other related technologies at home and abroad,aiming at the current situation of multiple energy consumption characteristics network resources coexisting in cloud computing data center and sharing network resources with multiple cloud computing services,SDN technology is introduced,virtual network dynamic mapping technology is proposed,and a system that can automatically switch paths according to traffic size is designed.In this system,there are two paths for communication between virtual machines,i.e.optical switch and electrical switch.Through the switch,the integration of virtual network traffic is realized,and the redundant waste of physical network resources is reduced,so as to optimize the energy consumption of a data network.Secondly,Ping and Netperf are used to switch the system and record the data.Then through data comparison,the data with more packets are selected,and exploratory data analysis is used to preprocess the data.Finally,the decision tree algorithm is used to model and predict the delay time,and the prediction model of configuration parameters and delay time is proposed to find the traffic threshold that can switch paths and optimize the system.The experimental results show that the prototype system of virtual network dynamic mapping technology based on SDN can realize the dynamic adjustment ofvirtual network link without affecting the normal operation of network application,and achieve the goal of reducing network energy consumption by the reasonable matching of network traffic and network path.