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SDN (self-defending network) flow measuring method based on Open Flow

A technology of flow measurement and flow table, which is applied in the field of SDN flow measurement based on OpenFlow, can solve the problems of high SDN flow measurement overhead and inability to recognize wildcards, and achieve the effect of ensuring granularity and accuracy and reducing measurement overhead

Inactive Publication Date: 2014-12-24
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an OpenFlow-based SDN flow measurement method, solve the problems of large overhead and inability to recognize wildcards in the existing SDN flow measurement, and realize flexible and accurate flow measurement

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  • SDN (self-defending network) flow measuring method based on Open Flow

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Embodiment

[0028] figure 1 It is a schematic diagram of the workflow of the OpenFlow-based SDN traffic measurement method of the present invention. Such as figure 1 As shown, the OpenFlow-based SDN traffic measurement method of the present invention mainly includes four stages: flow measurement requirement input, measurement flow table entry delivery, flow information collection and statistics, and flow measurement completion. The specific implementation process of the present invention will be described below according to these four stages.

[0029] S101: Flow measurement demand input

[0030] The flow measurement requirements are set by the measurement personnel according to the measurement needs, and then the flow measurement requirements are input to the controller in the OpenFlow-based SDN network through the man-machine interface set with the controller. In practical applications, a flow measurement requirement table can be used To store different flow measurement requirements, ...

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Abstract

The invention discloses a SDN (self-defending network) flow measuring method based on Open Flow. The SDN flow measuring method based on the Open Flow comprises the following steps of generating a measurement flow table item by using a controller according to a flow measurement requirement; and transferring an operational order of a forwarding flow table item corresponding to data flow meeting the flow measurement requirement in a corresponding exchanger to a flow measurement flow table so that the data flow is accumulated by a counter of the measurement flow table item. The controller actively transmits flow querying information to the exchanger so as to query flow when the flow measurement requirement is inputted, new flow arrives and a time interval is maximum, and passively receives flow information reported by the exchanger when the measurement flow table item is deleted, so that the flow information is acquired and counted, and a result is stored in a flow statistical result table. By the measurement flow table item, the problems that the existing SDN flow measurement is high in cost, and wildcard characters cannot be recognized are solved; and the flow can be measured flexibly and accurately.

Description

technical field [0001] The invention belongs to the technical field of SDN flow measurement, and more specifically, relates to an OpenFlow-based SDN flow measurement method. Background technique [0002] Traffic measurement is the main technical method used to obtain network resource conditions such as network traffic conditions and link usage conditions. It is widely used in network management work, such as load balancing, traffic engineering, and anomaly detection. [0003] In traditional networks, data collection for flow measurement is often at discrete points, making it difficult to obtain a global view of flow. And its network is hardware-centric, and its flow measurement is not conducive to deployment and has a large cost. Taking the current ideal flow-based NetFlow technology in deployment as an example, NetFlow needs to pre-set the network collector and perform To expand the identification, the traffic measurement function is realized by counting the past traffic a...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/947
Inventor 罗绪成刘梦娟刘峤陈伟张翔刘亚军汤四见李伟铭赵鹏
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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