Network Accounting Of Research And Design To Achieve

With the increase of network bandwidth and Qos requested by people, more and more attentions are being highly focused on the network accounting. Especially, there come out many new aspects of network operation. But currently, multitude network accounting systems can't meet new needs or can't apply in a universalcircumstance. So the universality in some instances and the adaption to new requests become urgent needs of network accounting. Through comprehensive researches, we put forward an effective solution and implementation of network accounting.All kinds of major network accounting methods and their application environments are discussed in this thesis firstly. And it summarizes the developments and requirements of network accounting. Then it analyzes the topolopy and the user's requirements of a network management center. According to the analyse it provides a network accounting solution realized by Cisco NetFlow flux accounting, SNMP flux accounting and Radius time accounting. It introduces the theory of the three technologies, describes the general design and the concrete implementation.There are many excellent ideas in the thesis, such as thread pool when handling incoming packets, using of LDAP to reduce the response time of Radius authentication, timeout and retransmission on application layer when using UDP, self-adaption arithmetic of intervals when collecting data from router, and the effective design of database policy. To increase the robustness of the system, we use the major-minor schema and the real-time monitor. The thesis expounds these idears and for some parts, it analyzes the data structure and the source codes..We present the testing methods and results for main parts of our implementation. In the end, we discuss the new requirements of network accounting and prospect its future. And also we account for the shortcoming of the implementation. Above all, throuth careful design and testing, the network accounting system has come into application. It has been checked and accepted and will be spreaded in some instances.