Table entry space adjusting method and device in SDN network

Abstract

The invention discloses a table entry space adjusting method and device in an SDN network. The method includes the steps that an SDN controller obtains space usage conditions of flow tables on a network device; when the space usage condition of the first flow table is larger than a first preset numerical value, the SDN controller determines the second flow table with the littlest space usage in table entry spaces by means of the space usage conditions of the flow tables; the SDN controller sends a first indication message and a second indication message to the network device, the first indication message is used for indicating the network device to reduce the table entry space of the second flow table by a preset third numerical value, and the second indication message is used for indicating the network device to increase the table entry space of the first flow table by the preset third numerical value. According to the table entry space adjusting method and device, the SDN controller can adjust the table entry spaces of the flow tables according to needs and increase the use ratio of the table entry spaces on the network device.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a method and device for adjusting an entry space in an SDN (Software Defined Network, software-defined network) network. Background technique [0002] SDN (Software Defined Network, Software Defined Network) network is a new type of network innovation architecture. Its core idea is to separate the control plane of network equipment from the forwarding plane, so as to realize flexible control of traffic, and provide core network and application innovation. good platform. In an SDN network, it includes network devices (such as switches) and SDN controllers. The SDN controller is used to generate a flow table (Flow Table) according to the user's configuration or a dynamically running protocol, and send the flow table to the network device. The network device is used to receive the flow table from the SDN controller, and match and process packets according to t...

AI Technical Summary

Problems solved by technology

Furthermore, the SDN controller cannot adjust the entry space of the flow table according to the needs, and cannot adjust the entry space of the flow table according to the business situation, resulting in a relatively low utilization rate of the entry space on the network device

[0004] For example, flow table 1 and flow table 2 are maintained on the network device. The entry space of flow table 1 is 4K, and the entry space of flow table 2 is 4K. If the space usage of flow table 1 is 100%, the space of flow table 2 If the space usage is 5%, flow entries cannot be stored in flow table 1, and there is still a large amount of unused entry space in flow table 2. Therefore, for the overall entry space of flow table 1 and flow table 2 In terms of utilization rate is relatively low

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