Research And Implementation Of DiffServ Model On High-Speed Routing Data Plane Using Microcode

With the developing of transfer technology and the application of fiber in the core network, the bottleneck of network has turned to node from link. Core router becomes high-speed and broad-band more and more. But the types of traffic are diversiform with the exploding of data stream. This needs the core router to have the ability of differentiating the services while processing the exploding traffic which is different from the traditional ones.This paper chooses DiffServ as the model for realization of IP QoS on the core router. On the base of researching on the theory of DiffServ, the physical architecture and logical layers of DiffServ router based on network processor are given. Then put the emphasis on the key technologies for realization of DiffServ on routing data plane. In allusion to the limitation of traditional classification in support of IPv6,the paper addresses a algorithm for IPv6 multi-field classification and evaluates the algorithm performance. On the ground of platform of Intel network processor, IXP2800, the high-level plan of DiffServ application on high-speed routing data-plane is designed and then the plans for each of key technologies. Most of the plans has been coded in the SDK4.0 development environment using microcode. To meet the need of high-speed ,this paper also gives the method for optimizing.The total plan is simulated in the simulation environment of SDK4.0 for performance and tested on the platform of terabit router for functions. The plan can realize differentiating services at the same time keeping the line-rate performance..