The Flattening Transformation Design Of Campus Network Based On The QinQ Protocol

With a large scale of expansion of enrollment and ampus, campus network scale expands rapidly, campus network is to more fully support all application, the basic network of a highly efficient and full integration of digital campus are more obvious in promoting the development of Higher Education,, The construction of digital campus in Colleges and universities need based network with high performance, high availability, high reliability and high security features. Campus network should not only support the universal network application, including e-government, website, email, network finance, consumer electronics and authentication, distributed database, but also provides high level application based on quality control, including voice bearing, remote online teaching, remote medical treatment, video conference, engineering design and development. The basis of network of College and Universities is difficult to adapt to the rapid development of users and application, the common solution is to upgrade equipment, but the replacement of equipment can only be a temporary solution to need, therefore, the network of College and Universities faces the choice to enhance the overall performance of the network from the adjustment of network structure and the optimization of network management。The innovation point of this article:First, from the functional division of view, the campus is divided into the network access and service control two aspects, access equipment and convergence device provides only basic network access services, core BAS equipment provide the service control, which greatly simplifies the structure of network, provide a basic condition for precise control of network.Second, by matching the "Option" options of Discovery package, shielding the user to connect the router. In the Web Portal authentication mode, the user initiates the Discovery request packet to the DHCP server, Discovery packet "Option55" option contains the character code, the router of different manufacturers have different characteristics code, based on the "Option55" option in the DHCP server, shielding users to connect the router,, We solve a problem on management through technical means。In this paper, the following works are completed:First, analysis of the network structure, equipment characteristics and management mode of traditional campus. Traditional campus network structure is generally three layer, including the convergence layer, access layer and core layer. The three layer structure of the campus network has the following characteristics:complex structure; no isolation between users, no isolation between services, vulnerable to the impact of each other;the Control functioneach distribution in each layer of campus network, The efficiency of troubleshooting networks is relatively low; the new service deployment involves multi level, multi equipment, workload is big;Access equipment and gathering equipment is relatively low, but take more business; high performance core equipment can not be brought into full play; the whole network expansion and upgrade ability is weak, the cost of upgrading is high.Second, the campus net flattening transformation method is proposed through the traditional analysis based on campus network. user can access the core equipment through the flat two layer campus network, realize the isolation between users, also is the realization of user segments, so as to realize the accurate network management. The user isolation can eliminate the effect of inter user each other, eliminate the broadcast storm impact, to prevent the occurrence of ARP attack. Due to do the fine division of the user, we can make the control strategy to the user and the application of the rich in control level, it is beneficial to resolve problems. Management of centralized control, improve the efficiency of network maintenance, but also to protect the pre investment.Third, taking M University as the demand object, based on analyzing the present situation of the network and information construction of M University, combined with the characteristics of the flattening of the campus network, this paper propose the network reconstruction scheme based on the original network, namely flat network structure, fine management of network, and make a detailed description of the scheme also.Fourth, details the implementation process of transformation of M University Network according to the design method of flat network, the realization methods are given and the configuration code detailed from the structure of the network planning, IP address planning, equipment name, equipment configuration and other aspects. At the same time, in order to verify the implementation effect of the plan, do the effect validation from the user isolation, flow control and soFifth, make a summary of the whole plan, put forward the innovation, problems and improvements can be.