Design and Implementation of Vo IPQoS Model Combining IntServ and DiffServ Based on Network Processor IXP2400

By analyzing the mechanism of IntServ (integrated services) and DiffServ (differentiated services), it is pointed out that although IntServ model can provide a QoS (quality of service) guarantee for end-to-end service, there is a limitation in extensibility of the resource reservation process according to RSVP (resource reservation protocol). DiffServ model cannot provide a QoS guarantee for end-to-end service in the whole network, but it can meet requirements of practical application for extensibility. In order to attain the ideal level of the requirements of end-to-end service, a Vo IPQoS model combining IntServ and DiffServ based on network processor IXP2400 is designed by complementing advantages of IntServ mechanism and DiffServ mechanism, and its implementation process is described in detail.