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Flow table entry idle timeout detection method based on openflow switch

A technology of timeout detection and switch, applied in the field of network communication, can solve the problems of high computing overhead and low packet forwarding efficiency, and achieve the effect of reducing computing overhead and improving the efficiency of timeout detection.

Active Publication Date: 2019-12-17
北京中科海网科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing flow table entry idle timeout detection method, which has relatively large calculation overhead and low packet forwarding efficiency, thereby providing a method that can reduce the calculation overhead and improve the flow table entry timeout detection efficiency

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  • Flow table entry idle timeout detection method based on openflow switch
  • Flow table entry idle timeout detection method based on openflow switch

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Embodiment Construction

[0029] The present invention will be further described now in conjunction with accompanying drawing.

[0030] Considering the defects in the calculation overhead and packet forwarding efficiency of the existing flow table item idle timeout detection method, the method of the present invention establishes a hash table with the timeout time as the key value, and the hash table is in seconds (second) The earliest possible timeout moment of each flow table entry is identified for time granularity. Then, after receiving the flow table, calculate the earliest possible timeout time of each flow table entry, and then store the flow table entry ID and the latest packet matching time of the entry into the corresponding hash table. When the switch is running, the hash table is used as a table for timeout detection, and the current time is used as the key value to traverse the flow table entries that are most likely to time out at the current time, so as to detect the timeout entries. Th...

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Abstract

The present invention relates to a flow table item idle timeout detection method based on an openflow switch, comprising: establishing a hash table with a timeout time as a key value, and the hash table identifies each flow table item with seconds as a time granularity The earliest possible timeout time of the flow table; after receiving the flow table, calculate the earliest possible timeout time of each flow table entry, and then store the flow table entry ID and the latest packet matching time of the entry into Corresponding to the hash table; when the switch is running, the hash table is used as a table for timeout detection, and the current time is used as the key value to traverse the flow table entries that are most likely to time out at the current time, thereby detecting the timeout entry.

Description

technical field [0001] The invention relates to the field of network communication, in particular to an openflow switch-based flow table entry idle timeout detection method. Background technique [0002] With the rapid development of the Internet, Internet data centers are also developing rapidly. With the development of cloud computing, more application processing is concentrated on the cloud, prompting a sharp increase in the scale of cloud computing data centers. Data center networks face many problems, such as centralized and efficient network management requirements, efficient and flexible networking requirements, virtual machine deployment and migration requirements, virtual multi-tenant business support requirements, and comprehensive data center IaaS requirements. [0003] In this regard, the academic community has proposed the concept of Software Defined Network (SDN). SDN has the characteristics of separation of forwarding and control, centralized control logic, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/883H04L49/9015
Inventor 陈晓贾正义曹作伟
Owner 北京中科海网科技有限公司