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

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.

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...

AI Technical Summary

Problems solved by technology

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 corresponding devices before data transmission, this mode of flow table delivery is faster. In the case of frequent changes in the network status, the sending mode will cause a huge amount of calculation for the centralized control system

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