A method for optimizing the number of flow tables in an SDN in-band control network

A technology for network control and optimization methods, applied in the field of communication networks, can solve problems such as too many control flow flow tables, and achieve the effects of reducing the number of flow tables, flexible grouping, and little impact on overhead

Active Publication Date: 2021-07-13
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem of too many control flow flow tables in large-scale networks in the above-mentioned background technology. A method for optimizing the number of flow tables in an SDN in-band control network is designed. way, reduce the number of control flow flow tables, and improve the efficiency of switch flow table resources

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  • A method for optimizing the number of flow tables in an SDN in-band control network
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  • A method for optimizing the number of flow tables in an SDN in-band control network

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[0025] The technical solutions described in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The invention is based on figure 1 The flow table number optimization process of the SDN in-band control network shown in the figure divides the controller into a grouping algorithm module, a label allocation module and a label forwarding module. The specific implementation process is as follows:

[0027] The grouping algorithm module groups the switch nodes of the whole network, and sends the grouping results to the label distribution module. The grouping of a typical network is as follows figure 2 shown. The input of the group selection algorithm of the switch is the network topology G, and the output is the final group set O. The algorithm steps are as follows:

[0028] 1) Calculate the shortest path from all switch nodes to the controller and the number of intermediate hops to the controller;

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Abstract

The present invention proposes a method for optimizing the number of flow tables in an SDN in-band control network. In this method, switches in the network are grouped, and each group is assigned a specific label identifier. By changing the matching field of the flow table from an IP address to a label, The label forwarding of the control network is realized, and the number of flow tables of the in-band control network is reduced. The method for optimizing the number of flow tables in the SDN in-band control network is mainly composed of a grouping algorithm module, a label distribution module, and a label forwarding module. Labels are assigned to the group, and the label forwarding module generates a flow table for label forwarding. The invention solves the problem of too many control flow flow tables in a large-scale network, and improves the use efficiency of switch flow table resources.

Description

technical field [0001] The invention relates to the field of communication networks, and proposes a method for optimizing the number of flow tables based on packet label forwarding in an SDN in-band control network. Background technique [0002] In the SDN network, there are two ways to deploy controllers and switches: out-of-band control mode (out-band) and in-band control mode (in-band). In the out-of-band control mode, the controller and the switch are forwarded through a dedicated transmission channel, that is, control information and service information use different transmission links. In the in-band control mode, the control information and service information between the controller and the switch share a physical link for forwarding. [0003] Compared with the out-of-band control mode of establishing dedicated lines, in-band control can reduce the complexity of large-scale network deployment and improve the economy of network construction. Due to good flexibility a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/715H04L12/723H04L45/50
CPCH04L45/50H04L45/04
Inventor 徐耀峰张学敏娄阳刘学武王金江杨小伟李成武任占广任乐源
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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