Design And Implementation Of Application Routing Component Based On CloudVPN

In recent years,with the development of society and informatization,the construction of informatization for enterprise has gradually received attention.The communication network construction between enterprises is an important part of enterprise information.The construction of enterprise dedicated lines is mainly realized by purchasing the dedicated lines provided by operators,which will cause problems such as functional solidification,high cost and long business cycle.Therefore,a new networking method,CloudVPN(Cloud Virtual Private Network),has emerged.It solves the problems of network construction in traditional zones by establishing VPN lines and moving control functions up to the cloud.In this thesis,aiming at the network construction mode of CloudVPN zones,the application routing function is provided for CloudVPN between VPN lines according to users' customized requirements.This function can solve the difficulties of routing policy configuration,single routing method and long routing switching cycle in the traditional network.By utilizing the SDN(Software Defined Network)network architecture,the network function is programmable and open to users,which effectively provides support for the construction of enterprise zones network.Firstly,this thesis introduces the background of the project and the techniques involved in the realization of the function of route selection;functional requirements analysis and non-functional requirements analysis are conducted for the services provided by the application routing function.Then,the application routing component is designed according to the idea of software engineering.On the basis of the outline design,the detailed design and implementation of the application routing component are given,and the design principle and implementation of the active strategy routing mechanism are proposed.Furthermore,the design and implementation of the forwarding network carrier scheme are carried out,and the core function classes of each main functional module are described by combining UML class diagram.In accordance with the test method of software engineering,the function modules and component function are tested,which basically meet the requirements.Finally,this thesis summarizes the work of the thesis,and the problem to be solved in the future and the next step in this work are pointed out.