Distributed Network Performance Evaluation Technology Research And System Realization

Along with the rapid development of computer networks, global communications with widespread open net environments have become the dominant trend in the future. More and more enterprises and organizations constructed the networks for their important business to improve the efficiency and reduce the cost. Meanwhile, how to assess and choose the devices used to construct the networks has come to be a practical problem in front of the management staff. Therefore, it is practical and valuable to research and develop a widely-applied network device performance assessment system.This paper aims at deep research of network device performance assessment method based on Simple Network Management Protocol (SNMP) and EETF's RFC2544. A distributed antitype assessment system with this function is provided, and a test is performed with this system. Some items will be discussed here. They are in turn: standards, methods and technical parameters of network device performance assessment; the architecture of SNMP; design and realization of the antitype assessment system; the process and result of the test with the antitype system. The research work mentioned in this paper is mainly about:(1) Research on basic network device performance assessment methods Classification, standards and key techniques of network device performanceassessment are presented; deep research on methods and associated technical terms of the assessment.(2) Research on SNMP architecture ???Functions, key factors and running mode of network management are presented;analysis of the SNMP's architecture and principle, and the structure of Management Information Base (MIB).(3) Design and realization of the assessment systemDetailed analysis of the feasibility of network device performance test based on LAN; formulas which the tests should based on are presented; the flow and key techniques of the test are illustrated in detail; interface structures between subsystems are also presented; design and C++ programming of the assessment system, named Distributed Network Performance Assessment System (DNPAS), based on Windows socket.(4) Test and result analysisTest on the forwarding throughput of a personal computer in a LAN environment are performed, and the analysis of test result is presented.