Design And Implementation Of QoS Based On Large-scale Campus Network

Thanks to the rapid development of the internet, multimedia service has greatly developed. The traditional internet is designed for non-realtime data communication, and it only renders service mode in its power. All traffic streams compete for the network resource fairly. The router tries its best to send IP packets to the destinations. But it doesn' t guarantee the performance of the reliability, delay and so on. So this service mode is fit for non-realtime traffic, such as E-mail, Ftp and WWW. But with the wide application of distributed multimedia technology, the traditional IP network can't satisfy the requirement of those services. This is bad for the development of multimedia service. Aiming at this, IETF suggests a QoS solution called diffserv, which can supply different services with different traffic types. So QoS is guaranteed. This paper is about the research on the diffserv model.The paper is mainly about the research on the architecture of the diffserv model and the realization of the key technologies in the model. It did the research on the architecture of the diffserv model in detail. And it did the comparison on the scheduling mechanism of queues. Based on the research of theories, the diffserv model was applied in the network and some general principles were obtained in designing QoS of campus network. These principles included universal QoS principle, classification and classification, supervision and degradation, queue and discard, deploy and so on. Under the guidance of these, the paper gave analysis of a practical application requirement of campus network. A QoS solution was designed based on these principles. The OoS strategy was tested on the equipment, and it was of some effect. To some extent, this solved the problem of key data transmission in campus network.