A method and device for delivering SDN hybrid mode flow table based on network topology determination

A technology of network topology and mixed mode, applied in the field of information communication, can solve the problems of the huge amount of calculation of the centralized control system, achieve the effect of ensuring real-time performance and reliability, and controlling the amount of calculation of the software

CN107222412BActive Publication Date: 2022-04-05GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-04-05

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Abstract

The present invention provides a method and device for issuing SDN mixed-mode flow tables based on network topology determination, including: monitoring whether the network topology changes within a preset period, and marking the network status according to the network topology change / not change; The network state adjusts the aging time of the flow table; when there is a flow table to be delivered, the static flow table mode or the dynamic flow table mode is selected to deliver the flow table according to the network state and the flow table aging time. The technical solution provided by the present invention realizes the static mode and the dynamic mode by setting the topology threshold module in the application system and classifying the priority of the business, using the northbound interface to call the controller topology information, and performing cyclic judgment and real-time delivery mode conversion The combined mixed-mode flow table distribution mechanism can effectively control the huge amount of software calculations caused by topology changes in large-scale SDN networks, and ensure the real-time performance and reliability of key services.
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Description

technical field

[0001] The invention belongs to the technical field of information communication, and in particular relates to a method and a device for delivering an SDN mixed-mode flow table based on network topology determination. Background technique

[0002] In a software-defined network (Software Defined Network, SDN), there are two mechanisms for delivering a flow table in a static mode and delivering a flow table in a dynamic mode.

[0003] Static mode flow table delivery (as attached figure 1 shown) means that the flow entry is issued before the data is transmitted. The process of actively issuing the flow table of the controller can be performed remotely using the RESTful style of Web calls and the HTTP protocol, or the embedded APP in the SDN controller can use the embedded API to directly issue the flow table. Static mode flow table delivery is suitable for SDN networks that can be planned in advance. Since the rules have been set and delivered to the correspon...

Examples

Embodiment

[0069] This embodiment provides a method for delivering an SDN mixed-mode flow table based on network topology determination.

[0070] Assume that there are four kinds of services in the application system of the current SDN network β 1 ,β 2 ,β 3 ,β 4 , the service flow table aging time is t β , the initial topology refresh and flow table update period T is 20s, and the topology threshold trigger period T c for That is, 5s, the priority order of the four services is β 1 >β 2 >β 3 >β 4 .

[0071] S1: In the period of 20s, if the topology does not change, then at this time, the topology refresh and flow table update period is still 20s, and the network status is S T , the aging time of the flow tables of the four services is

[0072] S2: In the 20s period, if the topology changes, the topology refresh and flow table update period becomes 10s at this time, and the network status is S T , the aging time of the flow tables of the four services is

[0073] S3: In t...