A Model of DiffServ System based on IXP2400

Network Processor is a kind of high speed and programmable processor which is used to process date and switch data. NP stands for a new direction of the network equipment's design.This paper gives a introduction of IXP2400, and shows a model of DiffServ based on IXP2400 in detail. From this paper, developers can get some experience for further developing based on NP.