Design And Implementation Of Initial Planning Deployment System For WAN Based On SDN

The expansion of network scale and the enrichment of the network function,which brings along problems such as low flexibility of network,high networking expenses,and heavy workload in operation and maintenance.SDN(Software Defined Network),a new network architecture concept of centralized management and control,data plane separation,open interface and network programmable,provides possible means to solve these problems.At present,the focus of the commercial deployment of SDN technology is the deployment and management of the efficient and dynamic service.Nevertheless,there is no concrete practice to solve the problem of high consumption caused by the presence of hardware and software engineers to install and configure the device.Based on the development of SDN technology and the current status of enterprise network planning and deployment,the paper aim to design and implement the subsystem of the existing Application-Driven Wan platform by using the open source framework OpenDayLight.This system is divided into three modules,i.e.the wizard of planning and deployment management module,device registration management module and business network management module.The wizard of planning and deployment management module provides enterprise users with customized enterprise networking,router equipment,basic services and other functions interface by utilizing network technology,such as routing,to model and the network,the ultimate users can get the corresponding configuration command for the planned device;The device registration management module makes use of the advantages of long communication of WebSocket communication protocol under the Netty framework to achieve the convenient registration and authentication of devices,enabling router to interact with the system after being powered on and run to the configuration file;The business network management module is to achieve the goal of automatic deployment for business network of the registered and on-line devices.The module utilizes VLAN and DHCP technology to design the content structure of basis business network,and make automated deployment with device interaction by using network management protocol based on XML NetConf technology.Finally,the system will integrate with other subsystems.It will be provided to users in three ways,such as RESTful API,WEB page and mobile APP,so that the initial planning and deployment tasks of Wan will be more convenient,faster and easier-to-maintain.In this paper,the specific system requirements are identified by analyzing the network planning and deployment under the branching scenario of Wan.Then the design and implementation are described in detail according to the module.Finally,the building of the test environment is described,and the main test instructions are given to each module.This system has passed the acceptance test in the company;its use will help reduce the cost of network deployment of enterprise user base,solve the problem that professionals are need to manually configure the basic network when deploying the commercial SDN products,make the basic network business integrate with the existing business,promote the market share of the existing Application-Driven Wan system.