Agent Simulator Snmp-based Network Equipment And Realization

This thesis explains the design scheme and fulfillment of network agent simulator based on SNMP in network management system to provide a virtual network environment for the deploying, testing and learning of the network management system.The current network management has become the importance that guarantee the normal movement in network the application. But in network manage of study experiment, pass to take to set up the network to provide to experiment the environment generally, like this of the experiment environment is not only cost is been high and difficult in management. The for this reason a text will construct the study that a network of Simulation equipments used for network management studies, passing to set up the different network appearance to that Simulator, canning imitate the different network affairs, in order to in proceed the network manage the study of the system.In this article main research network management system based on simple network management agreement SNMP network equipment agent and network correspondence between network management system, proposed simulates this kind of correspondence the method, and completes a network equipment simulator by this method the design and the realization. The network management system by the management advancement, the management agent, the management database, the network management agreement and so on is composed. Its working pattern is: The management agent collects the network equipment the operational parameter and the running status information, and this information transmission for management advancement; The management advancement carries on processing after the above information to send out the control command to the network equipment; The network equipment accepts after the control command, according to management advancement request work. In network management system, the network management procedure isrepresenting the management advancement, in network equipment Agent is representing the management agent, the network management process in these two between completes. Because the network management procedure sees to network equipment, is in the network equipment agent merely, by no means network equipment hardware itself, therefore, when research network management, through designs a software realization agent procedure the function, definitely may replace network equipment itself. This software needs to realize the function includes: Can respond the management station GetRequest, GetNextRequest, request and so on Set Request; Can produce, the transmission from falls (Trap) the text of a telegram and the analog network equipment administrative action. Because this software realizes is in the network equipment the Agent function, therefore we call it the Agent simulator.Each a network for can passing SNMP proceeding management equipments, its inner part all halts to stay a fixed Agent, that Agent is responsible for the emanative claim that respond to comes from the network management system, according to the request of the claim, read or establish Agent place network equipments appearance or parameters. The Agent reads or the appearance parameter that establishes, come from the MIB of the equipments oneself inside. This text a the emulator of Agent for designing, imitate a way for halting staying in the network Agent in the equipments, emulation have two kinds of: A kind of is work condition that various parameters to pass handicraft establishes that Agent, imitate the network equipments; Another a kind of is form that the former work condition that the record descends the real network equipments, then pass back to put on the emulator work appearance of re-appearing this equipments. These two kinds of emulations method, all can imitate a net for the network equipments is true circulate the circumstance, even is some networks to break down. That Simulator circulates to negotiate in the SNMP on.This text an emulator for designing, with Cisco 3550 exchange themachine for target, pass the network that analyze the in common use function mana...