Research On Network Function Virtualization Platform

In recent years,the demand for individual users' network traffic has been increasing,but the revenue of traditional mobile operators is not optimistic.The reason is that the higher and higher network requirements of users have caused the cost of deploying new equipment to be continuously increased in operations.Controlling the increase in the cost of the underlying equipment to reduce costs has become a topic of common concern to operators,and Network Function Virtualization(NFV)technology has emerged.As a widely used technical method,it decouples the network function hardware held by traditional operators and separates the network function from the proprietary hardware.It is deployed on X86 general-purpose servers and depends on the software.Implement corresponding virtual network functions to provide services outward.In this way,the resources can be effectively scheduled according to real-time requirements and the need for reducing equipment costs can be achieved.However,in actual application deployment,there are still many problems in the use of specific NFVs.For example,general-purpose servers are generally used to process traditional IT services.Compared to proprietary hardware,they handle high-rate forwarding services in NFVs.Facing severe performance bottlenecks,it is necessary to analyze in a targeted manner how to increase the efficiency of NFV use in actual use.In a single server,there are multiple processes in the entire forwarding process of a data packet that can affect the use efficiency of network functions.Using different virtualization methods will also have different effects on the deployment and migration of subsequent network functions.This thesis focuses on the performance requirements of NFV in actual deployment,analyzes the actual deployment architecture,and analyzes the data forwarding plane and virtualization plane that may cause performance bottlenecks.In the virtual forwarding layer,three software switching technologies,DPDK-OVS,NetMap,and Click,which are widely used in the industry,were selected for deployment.The technologies of DPDK and OpenvSwitch were integrated,and the use of NetMap in the NFV scenario was improved.The internal data structure,which builds the Click software router by constructing the Click infrastructure chain,implements three data forwarding planes,and compares the performance of the three data planes.In the selection of virtualization methods,KVM virtualization technology and Docker container technology were selected for analysis.Two virtualized methods were deployed on the actual host machine,and related network connection modes were optimized,and two virtualization methods were implemented.A performance test was conducted and the results were analyzed.Finally,a large-scale experimental platform was set up.Two NFV experimental platforms were deployed for different data forwarding planes and virtualization methods.The virtual network functions were tested,and the network throughput performance and disaster recovery performance were compared and analyzed.Three data forwarding planes and two virtualization methods have been proposed in the selection of NFV technology.