SDN (Software Defined Network) network abnormality monitoring method

A network abnormality and network technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as difficult application, rigidity, and difficulty in increasing, to ensure normal operation, accurate monitoring and detection, and improve accuracy. Effect

Active Publication Date: 2017-08-18
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Therefore, some passive measurement methods based on data packet collection are difficult to be applied in traditional networks
In addition, the different requirements in the complex heterogeneou...

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  • SDN (Software Defined Network) network abnormality monitoring method
  • SDN (Software Defined Network) network abnormality monitoring method
  • SDN (Software Defined Network) network abnormality monitoring method

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] Such as figure 1 As shown, in the whole path abnormality monitoring process, path abnormality monitoring is realized by four functional blocks. The first is the topology management module, which is responsible for obtaining the topology structure of the entire network and managing the topology structure, such as: link addition and Delete, network node and removal, etc.; then the path delay measurement module, the controller sends a probe packet to the network path to be measured according to the demand to obtain the delay information of the network path; after that, the available bandwidth measurement module, through the controller cycle The information of the counter on the port of the OpenFlow switch is polled to obtain the available bandwidth of the corresponding link; finally, the path abnormality monitoring module monitors the network path accordi...

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Abstract

The invention relates to a SDN (Software Defined Network) network abnormality monitoring method. An operation condition of a network path is analyzed in two aspects of delay and an available bandwidth of the path, and the abnormal path is detected and alarmed so as to ensure normal operation of the network path. The SDN network abnormality monitoring method adopts four functional modules: a network topology management module, a path delay measurement module, a path available bandwidth measurement module and a path abnormality monitoring module. According to the SDN network abnormality monitoring method disclosed by the invention, not only can delay and the available bandwidth of the network path be effectively measured, but also a path abnormal condition generated in the network transmitting process can be timely found and an alarm signal can be sent out. The SDN network abnormality monitoring method, under both network conditions of continuous network traffic and varied network traffic, can effectively complete abnormality monitoring on the network path and the measurement work on performance parameters.

Description

technical field [0001] The invention relates to a method for measuring path delay based on an SDN controller actively sending detection data packets and using an OpenFlow message for the SDN controller to measure available path bandwidth. Background technique [0002] In a traditional IP network, the control plane and the data forwarding plane are highly coupled, and each sub-network has its own control device. It is almost impossible for ordinary users to obtain the path status information of the entire network. Moreover, in the traditional network, for security reasons, some devices do not allow users to place data collection and monitoring points arbitrarily. Therefore, some passive measurement methods based on data packet collection are difficult to be applied in traditional networks. In addition, the different requirements in the complex heterogeneous network make the process of building and managing the traditional network very cumbersome. The traditional IP network h...

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Application Information

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IPC IPC(8): H04L12/24H04L12/26
CPCH04L41/06H04L43/0852H04L43/0894
Inventor 蔡志平李阳
Owner NAT UNIV OF DEFENSE TECH
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