The Research And Implementation Of SNMP-Based Network Management System

With the development of computer and communication technology, computer network has already become an indispensable part of life gradually. Along with the development of Internet technology, enlargement of the Internet scale and complicated structure of Internet, people realize the importance of network management. And the effective network management has already become an important measure of the network.Network management system is a distributed network application system which includes software and hardware, software-based; the object of it is to manage the network and make the network more efficiently. Network management, in essence, is the purpose of reducing network faults and making the operation systems and application systems run smoothly on it. Network management is a necessity in the development of computer network's evolution, which is developing along with the computer network. The development of network management technology is pivotal to computer network's evolution, for the reason that a network's running quality will be effected by whether the network management's quality is good or not.A good NMS can conduct effective surveillance, interpretation and control on all kinds of network equipments and software resources, to the purpose of making network reliable, safe and efficient running. In the long-term of network operation and management practice, a set of requirements to meet this industry-standard of network management has been created. SNMP (Simple Network Management Protocol) as a network management protocol is the industry standard which is widely accepted and put into use. Its goal is to ensure that the network management information is transmitted between any management entities supporting SNMP protocol and the controlled equipments, ease NMS to retrieve network parameters in any node on the network. SNMP is an application layer protocol of the TCP/IP protocol clusters, and it adopts a Client/Server model: Management/Agent model. Through the interaction between the managements and agents, it completes the network management and maintenance.This article discusses the history of network management; introduces several NMS products's characteristics both at home and abroad; analyses NMS architecture, the basic model, researches the principles and implementation of SNMP etc. On this basis, it does the following studies and implementation to the development of NMS: Design and Implementation of a subsystem in the NMS - flow control subsystem. Through the real-time traffic monitoring of the core switch, we can grasp the overall operation of the network; in the topology discovery and the operation of the network process, some equipments, particularly the state-owned equipments, their private MIB data can't be acquired. To solve the issue, we config TELNET tool in the NMS, and you can use this tool to obtain the necessary MIB information. With the development trends of network management system, the article analyses the feasibility and inevitability of the business-oriented NMS, and does the overall framework's design and operational subsystems's detail design.