Research On Campus Network Multi-ISP Links Of Differentiated Services Supporting

With the expansion of the scale campus network, the growth of campus network traffic and the application of a variety of network media, traditional "best effort" service model has been unable to meet the QoS requirements of the campus network transmission. Meanwhile, the single CERNET can not meet teachers and students' needs to access network resources by unlimited bandwidth. Therefore, colleges and universities introduce other ISP to meet the growing bandwidth demand. Although the multi-ISP link is able to satisfy the bandwidth demand, there is no reasonable solution for link selection. For a particular campus environment, how to achieve the optimal choice of multi-ISP links is important for the effective use of campus resources.This dissertation-- Research on campus network Multi-ISP Links of Differentiated Services Supporting -- is proposed in this context. In order to achieve the purpose of improving utilization of network resources, the dissertation mainly discus the dynamic link selective for different network applications at school. The main work as below:First, with the research of applications of traditional multi-ISP link, and access features of campus network traffic, the dissertation points out the lack of accessing network from campus by multiple ISP links;Second, combined with more exports campus network environment, the dissertation researches on the campus network a particular network application. For different applications different applications priority and access bandwidth are set so as to better meet the application type demand of differentiated services for campus network.Third, the dissertation sets up network application dynamic link selection model based on the destination address response time. Then according to user accessing different resources the campus network can select the shortest response time link. And this model can ensure service quality.In a word, for the campus network application types, the system can set different access bandwidth and priority scheduling level. And in the based environment of application types differentiating service, it can achieve more chain dynamic optimal ISP path selection. In other words, it can choose the shortest response time link to access network at different times.