A method and device for adjusting table space in an SDN network

Abstract

The present invention discloses a method and equipment for adjusting table item space in an SDN network. The method includes: the SDN controller acquires the space usage of the flow table on the network device; when the space usage of the first flow table is greater than the preset first When a value is a certain value, the SDN controller uses the space usage of the flow table to determine the second flow table with the least space usage of the entry space; the SDN controller sends the first indication message and the second indication message to the network device, and the first The one instruction message is used to instruct the network device to decrease the entry space of the second flow table by a preset third value, and the second instruction message is used to instruct the network device to increase the entry space of the first flow table by a preset third value. In the embodiment of the present invention, the SDN controller can adjust the entry space of the flow table as required, so as to improve the utilization rate of the entry space 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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