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Mobile agnets are programs that can migrate from host to host in a network, at times and to places of their own choosing. Mobile agent contains some properties, such as autonomy, mobility, communication and reactivity.In existed system, a mobile agent always migrates between hosts as a whole, and agents always consumes too much bandwidth and limits the use of mobile agent systems in this way. In the paper, We present a conception of optional migration mechanism, that means agent codes are divided into many subcodes and migrate as subcodes, which can be added or deleted in any time and in any place.This paper also introduces a system based on optional migration mechanism, called ’Dmogent’, which is designed by writer. The system consists of Central Server, Agent Server and Mobile agent, and the architecture of the system is descripted in chapter 3.By the way, the implement of the system is studied in chapter 4 and chapter 5. In chapter 6, a system of Network Management, which is developed on mobile agent and CORBA, is introduced. At last an experiment about performance of system is analysed.
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