Crucial Technology Study of Internet End-to-End Performance Monitoring and Analysis

A distributed network performance monitoring and on-line analysis system——NIPMAS was developed to realize performance management and rudimentary trouble shooting of large-scale network.It is based on end-to-end paths measurement and active measurement.Three critical techniques used in NIPMAS are illustrated,namely：（1） How to apply active measurement to network performance monitoring and on-line analysis；（2） How to realize the concepts of level network monitoring model LNM for hierarchical network and introducing GIS into NIPMAS；（3） How to locate fault and confine it within a network segment.