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Network topology determination-based SDN mixed mode flow table delivery method and device

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

Active Publication Date: 2017-09-29
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Network topology determination-based SDN mixed mode flow table delivery method and device
  • Network topology determination-based SDN mixed mode flow table delivery method and device
  • Network topology determination-based SDN mixed mode flow table delivery method and device

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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...

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Abstract

The invention provides a network topology determination-based SDN mixed mode flow table delivery method and device. The method comprises the steps of monitoring whether a network topology changes in a preset period, and marking a network state according to a network topology changing or unchanging condition; adjusting flow table aging time according to the network state; and when a flow table is delivered, selecting a static flow table mode or a dynamic flow table mode to deliver the flow table according to the network state and the flow table aging time. According to the network topology determination-based SDN mixed mode flow table delivery method and device, a topological threshold module is set in an application system and the priorities of the services are set, a north interface is used to invoke the topological information of a controller, circulated determination is performed and mode change is delivered in real time, so as to realize a mixed mode flow table delivery mechanism combining both a static mode and a dynamic mode, massive software operation amount caused by topological change in a large-scale SDN network is effectively controlled, and key services are ensured to be timely and reliable.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/757H04L12/725
CPCH04L45/023H04L45/306
Inventor 刘川李炳林郭经红张刚徐鑫娄征喻强黄在朝张浩黄红兵王彦波
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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