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s work interface, that packet sniffing methods could not see the other host of data flow information. If the user wants to monitor the flow of data within the exchange work, you must open the switch monitoring port functions (Monitoring Port), the switch will take all the data packets through its copy version sent to the port, as long as the packet capture process applied to the port, which can be switched work information within the data stream. Packet sniffing technology is a mon work technology, by card can be set to promiscuous mode to receive all packets through the work card, so you can export the Survey Office in the work data collection points set up Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2021 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 88 to capture all the inflows and outflows of campus work IP data packets, and then by analyzing the contents of the packet protocol and flow data can be collected. 4. NetFlow data flowbased acquisition Cisco NetFlow is a Cisco IOSbased pany made an application system. It is used to provide work equipment, packet form on the flow of statistical information, and gradually evolved into a work traffic statistics and analysis of the primary means of security, this section will be an overview of NetFlow technology. NetFlow Switching NetFlow switching at the work layer to achieve highperformance switching, Cisco introduced by an exchange technique [25]. Most of the current highend Cisco routers have to support NetFlow switching and Juniper, Extreme and other work equipment vendors to support NetFlow switching, it has bee mon standards. NetFlow switching virtual LAN technology, based on the same platform provides the switching and routing functions in the exchange of two LAN or ATM backbone work to provide NetFlow switching, which allows the data transmitted between VLAN. NetFlow switching support Comparison of the current in the country, including a wide range of Cisco routers 2500 series, 4000 series, 7000 series, 7200 series and 7500 series routers routing process is basically similar, but the exchange process is based on its system structure varies . Cisco7200 Series Cisco7500 Series routers and the Cisco routers and higherlevel support for NetFlow switching routers. If you use a different routing platforms, they may have different exchange paths. Cisco2500/4000 series router hardware architecture than the 7000/7500 series routers, hardware simple. These devices only in the exchange process in the shared memory only. All packets are in the shared cache and Cache memory, it only supports fast switching or process switching. NetFlow Principle NetFlow technology, two key elements of NetFlow buffer operation and flow of information storage. Start NetFlow NetFlow service equipment will open a buffer, which contains all the activities of the current flow of information. In dealing with the first flow of the first packet, the buffer start building. For each of the activities of a buffer flow, has a flow record (flow record) corresponding. Each record contains a stream of the flow of critical information, this information will be regularly sent to the flow information collection device (NetFlow CollectionEngine), the flow information collection device to save all the information flow through the device39。s data, must also provide for a no ambiguity, unified data description syntax and encoding formats. Therefore, ITU provides the definition of information model of managed object definition syntax guide GDMO (Guidelines for Definition of Managed Objects) [18], OSI application layer protocol Common management information protocol CMIP (Common Management Information Protocol) [19], the standard data description language (Abstract Syntax Notation One) [20]. GDMO is mainly used to describe a variety of work syntax needs to be managed in a variety of concrete and abstract resources. General equipment manufacturers need to use this syntax information model describes the device out of the convenience of users or other manufacturers to achieve the management of the equipment. The underlying protocol CMIP general use OSI protocol stack is mainly used to achieve the GDMO object definitions of various operations such as create, delete object instance, read and write attributes so. As the hardware, software platforms, data format (encoding format, word length, the internal addressing boundary structure, etc.) of different, TMN managers and agents must pass the data Description Syntax description to ensure the reception to properly analyze the data, remove the correct data content. is not only a data description language, it also provides for munications between the parties with a data encoding format, such as BER (Basic Encoding Rule). In a management process and management procedures to be between the definition of a standard GDMO information model, with the definition of interactive data, using CMIP to achieve interoperability. This point is achieved, we can think of devices to ply with the TMN Q3 interfaces between modules (Reference Point) standards. Of course, ITU is also provided for other interfaces, such Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2021 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 86 as QX, X, etc., these interfaces can be considered for the Q3 of services. objective of the research and content This article is designed Campus Network Traffic Management System, the school principal is to achieve the original work data and traffic speed data acquisition, plete realtime monitoring and statistical data, and to plete work on the statistical business data, so the work service providers to that the advanced traffic management system i