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Dynamic flow generating method for distributed SDN controllers

A controller and distributed technology, applied in the computer field, can solve problems such as heavy load of network and forwarding equipment, decreased forwarding performance, and reduced network performance, so as to achieve the effect of improving bandwidth utilization, reducing network bandwidth, and simplifying routing information

Inactive Publication Date: 2015-11-18
BEIHANG UNIV
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Problems solved by technology

Flow entries of this magnitude will add a lot of load to switches with limited resources, degrading their forwarding performance
However, in the existing distributed controllers, the shortest path algorithm is used to generate the flow table, and the network managed by the distributed controller is not analyzed, so that the network and the forwarding device will be generated when the flow table is generated and stored. Heavy load, degrades overall network performance

Method used

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  • Dynamic flow generating method for distributed SDN controllers
  • Dynamic flow generating method for distributed SDN controllers
  • Dynamic flow generating method for distributed SDN controllers

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0031] The present invention is a method for generating a dynamic flow table oriented to a distributed SDN controller, figure 1 The structure of an autonomous domain is shown in , which includes a controller, several switches, and many hosts connected to the switches. The controller manages the switches by sending flow tables, so as to achieve the purpose of managing and scheduling the network. The technology proposed by the invention achieves the purpose of managing the network when generating as few flow tables as possible, thereby improving the overall performance of the network.

[0032] The technical solution will be described below with the overall structure diagram of the distributed SDN controller. Structure diagram such as f...

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Abstract

The invention provides a dynamic flow generating method for distributed SDN controllers, which can effectively reduce flows generated by controllers, increase the bandwidth of managed networks, reduce consumption of switch storage resources and thereby improve the overall network performance. The method comprises the following steps of treating a network area managed by one controller as a network autonomous domain; adopting a shortest path algorithm to generate flows when the flow requests received by the controller are data packets sent to the domain; when the flow requests received by the controller are data packets sent from the domain to the outside, then firstly acquiring the global topology view of all networks managed by the distributed controllers through the controller to generate a global flow; sending down the flow part belonging to the domain in the global flow to switches in the domain and meanwhile sending the rest flows not belonging to the domain to their respective controllers. The respective controllers send the rest flows down.

Description

technical field [0001] The invention relates to a method for generating a dynamic flow table oriented to a distributed SDN controller, belonging to the technical field of computers. Background technique [0002] In the traditional Internet, the control center and forwarding center are concentrated in a single network device, which makes the existing network control plane increasingly complex. At the same time, the application of new management technologies to the network requires the configuration of existing network devices one by one. , greatly increased the cost, and seriously lacked flexibility and scalability. Therefore, the concept of decoupling the control plane and the forwarding plane is proposed. As long as both ends are connected according to the defined specifications, they can develop independently without being restricted by the other party. This is exactly the essence of SDN technology. Foundation, its early research work includes 4D architecture, RCP, SANE a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/741H04L12/757H04L45/74
CPCH04L45/021H04L45/54
Inventor 祝明发刘锐肖利民阮利
Owner BEIHANG UNIV
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