1、 Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2010 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 80 Netflow-based campus network traffic management system 1 Prasad Calyam, 2 Dima Krymskiy, 2 Mukundan Sridharan, 1 Paul Schopis 1 OARnet
2、, 1224 Kinnear Road,Columbus, Ohio 43212. Email:pcalyam, 2 Department of Computer Science and Engineering, The Ohio State University, Columbus, Ohio 43210. Email:krymskiy, sridharacse.ohio-state.edu Abstract-In recent years, with the campus network size, complexity increases, the building in the ca
3、mpus network, the application of more and more, which makes a variety of network problems resulting, for such a large complex networks to solve network problems is the key issue of positioning. Therefore, relevant information on network traffic and monitoring the implementation of scientific and rat
4、ional and in-depth analysis, become an important element of network management, while it is for the network problems and provide effective solutions for network planning is one important means. This chapter describes the development trend of network management and network management, analysis techni
5、ques based on NetFlow traffic management system needs to achieve. The second chapter analyzes the current popular network data stream collection method, compared their advantages and disadvantages, and introduces the principle of NetFlow technology, data formats, and its various applications. Chapte
6、r III introduces the design flow management system to analyze the function of each subsystem. Chapter IV introduces the important data structures and database design. Chapter V details the design of data acquisition module and the implementation process. Chapter VI details the data processing module
7、 design and implementation process. The final chapter on the whole traffic management system are summarized, described the system in some of the problems still exist, and NetFlow technology prospect. I. INTRODUCTION 1. Background With the rapid growth of Internet applications, more and more web appl
8、ications need to understand the flow of the network operation parameters, to support the services can be distinguished. By monitoring network traffic analysis and network management technology related business, you can monitor the network, including the monitoring of network operation, network resou
9、rces, network performance monitoring and surveillance. Monitoring quality control results will help the network and supporting network management, such as the discovery and correction of Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2010 at 07
10、:38:02 UTC from IEEE Xplore. Restrictions apply. 81 pathological routing, under long-term observation network routing, routing data to develop strategies. In addition, network traffic analysis can also be applied to different Internet Service Provider ISP comparison of the quality of service, the pr
11、oxy server automatically select and many other areas, while simulated Internet environment, protocol design and evaluation, and provide dynamic network analysis of survival basis. In this paper, design a campus network based on NetFlow traffic management system to be implemented in Hexi College camp
12、us network traffic statistics and management of the ports can also monitor and analyze the different types of data, enabling data on the campus network to view and management. 2. The basic concept of network management and content Network management refers to the supervision, organization and contro
13、l of network communications services, and information processing activities necessary for the general term. From the technical point of view, the network management process typically includes data acquisition, data processing, and then submitted to the manager, for use in network operations. It may
14、also include an analysis of the data and provide solutions, even while managers may not need to bother to handle some things. Further it can generate useful management reports management network. Network management goal is to ensure normal operation of a continuous network, or when the network when
15、abnormal response and troubleshooting time, making the network with the highest efficiency and productivity l. With the development and popularization of computer networks, network management is increasingly important. Not powerful management tools and effective management of technology is unable to
16、 organize coordination and efficient operation of the network. 2.1 Network management needs and goals 1)the demand for network management While networks and distributed processing systems for commercial applications and even to the peoples daily life has become increasingly important role, the compu
17、ter network of individuals and enterprises are increasingly becoming an indispensable tool for daily activities. Many companies, state organs and institutions of higher learning need to use every day on the network data such as e-mail and fax, video conferencing and voice services, etc. to ensure th
18、eir normal work. On the other hand the composition of the computer more and more complex, it is mainly manifested in the increasingly large scale networking, and networking equipment is a heterogeneous multi-device, multi-manufacturer environment, multi-protocol, there is no doubt this new situation
19、 increase the difficulty of network management. Management of such networks by hand is a powerless, so the network management is an urgent task. 2)The goal of network management Network management goal is to reduce the fault time, to improve and enhance the response time, improve equipment utilizati
20、on； reduce network operating costs, improve network efficiency, reduce network bottlenecks, and can adapt to a variety of multimedia technology to make it easier for more secure network use. Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2010 a
21、t 07:38:02 UTC from IEEE Xplore. Restrictions apply. 82 2.2 The field of network management technology Network management technology are mainly related to the following research areas 2-3. flow measurement. Interest for a particular network link, to accurately capture network activity measurements.
22、In the network-level traffic analysis and measurement, the need to measure data, including network topology, link capacity, queuing delay, connection availability, dynamic routing and other data types. modeling. This is the network behavior and traffic analysis of the core technical problems, only t
23、o establish a reasonable description of the network model, has been able to receive traffic data is used to describe the network performance and to achieve the forecast of future network behavior. m anagement and control. From the measurement and modeling using the knowledge gained to achieve the ra
24、tional allocation of Internet resources and use. Network traffic flow measurement is to obtain data, conduct traffic analysis and monitoring of the key and the foundation. Flow measurement of many categories, such as by measuring the way, is divided into active and passive measurement measurement； a
25、ccording to the number of measurement points, divided into single-point measurement and multi-point measurement； was measured according to those familiar with it or not, is divided into measurement and collaborative non-cooperative measurement； content according to measurement, measurement and perfo
26、rmance measurement into topology 4； according to the protocol used measured, divided into the measurement-based BGP protocol, based on TCP / IP protocol and measurement standard based on SNMP protocol or RMON surveying. Active measurement to the network by sending data, observations, and the time re
27、quired to send data to study the behavior of the network. So far, people do most of the projects involve the active measurement techniques, such as the United States, NIMI project, using ping, traceroute, mtrace other active measurement tools. To June 2000, the Internet run active measurement monito
28、rs the source site 116 (U.S. 114, New Zealand, Norway, 1 each), the purpose of the site was measured about 13 340 5. The purpose is to enhance the participation of high-performance networking sites and user operation of understanding. In the active measurement project, the scope of measurement is mu
29、ch greater than the passive measurements can be as large as global. Such a large measurement system, the network may cause a greater load, and difficult to configure and manage unified. In passive measurement, the recorded network activity probe was access to the network, test a low in most cases, t
30、he connection between the receiving network node, the summary and record the connection piece of the information flow of business. Passive measurement of the ongoing projects include: the U.S. National Science Foundation (NSF)-funded National Laboratory for Applied Network Research (NLANR) Measureme
31、nt Project (PMA), Berkeley University and IBM jointly developed SPAND projects 6. Passive measurement of a particular point of observation, mainly in the behavior of the network, not to increase and modify the data through the network load, it does not affect the behavior of the network. Also not difficult to see, passive measurement on the premise that collaboration, or can not Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2010 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 83
