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Flow table quantity optimization method for SDN in-band control network

A technology for controlling the network and optimizing methods, which is 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: 2020-03-17
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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  • Flow table quantity optimization method for SDN in-band control network
  • Flow table quantity optimization method for SDN in-band control network
  • Flow table quantity optimization method for SDN in-band control network

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Embodiment Construction

[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 invention brings forward a flow table quantity optimization method for SDN in-band control network. S witches in the network are grouped, a specific label identifier is allocated to each group, and label forwarding of the control network is realized by changing a matching domain of a flow table from an IP address to a label, so that the flow table quantity of the in-band control network is reduced. The flow table quantity optimization method of the SDN in-band control network is mainly composed of a grouping algorithm module, a label distribution module and a label forwarding module. Thegrouping algorithm module achieves grouping of the switches according to the hop count from the controller, the label distribution module distributes a label to each group according to the grouping situation, and the label forwarding module generates a flow table for label forwarding. According to the invention, the problem of excessive control flow tables in a large-scale network is solved, and the use efficiency of switch flow table resources is improved.

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...

Claims

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Application Information

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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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