Flow table processing method and device

A processing method and processing device technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as uncontrollable Openflow network traffic, TCP connection interruption, affecting existing forwarding of network traffic, etc.

Active Publication Date: 2018-09-04
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TCP connection will be interrupted due to network abnormalities between the Controller and the Switch (such as port DOWN, etc.)
Due to uncertain factors in the timing of TCP connection interruption, the flow table information on the Controller may be inconsistent with the flow table information on the Switch, resulting in uncontrollable Openflow network traffic and affecting the existing forwarding of current network traffic.

Method used

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  • Flow table processing method and device
  • Flow table processing method and device

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Embodiment Construction

[0051] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0052] In the embodiment of the present invention, when the connection between the controller and the network device is oscillating, it not only ensures that the flow table information on the network device and the controller is consistent, but also does not affect the existing forwarding of the current network traffic, and ensures that all traffic is controlled by the controller. control. A smooth flow table processing method is proposed. When the connection is disconnected and restored, the controller notifies the network device to start smoothing the flow table information, and sends all the flow table information held locally to the network device. The network device compares the The flow table information that exists in the network device and is inconsistent with the one delivered by the controller is deleted. ...

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PUM

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Abstract

The invention discloses a flow table processing method and device. The method includes: when the connection between the controller and the network equipment is restored from being disconnected, the network equipment receives a notification from the controller to start smoothing the flow table information. message; after receiving the notification message, the network device receives the flow table information issued by the controller; the network device compares the received flow table information with the locally stored flow table information, and compares the network The flow table information that already exists in the device and is inconsistent with the one delivered by the controller is deleted from the network device.

Description

technical field [0001] The present invention relates to the technical field of software-defined networks, in particular to a flow table processing method and device. Background technique [0002] In the software-defined network (SDN, Software Defined Network) architecture, the control plane is separated from the forwarding plane, the management and status of the network are logically centralized, and the underlying network foundation is abstracted from the application. As a result, enterprises and operators have unprecedented programmability, automation and control capabilities for the network, enabling them to easily adapt to changing business needs and build highly scalable and elastic networks. [0003] OpenFlow (OpenFlow) is the communication interface standard between the controller and the forwarding layer defined in the SDN architecture. The idea of ​​OpenFlow is to separate the control plane and the data plane, and use standard protocols for communication between the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/741H04L45/74
Inventor 缪琛高宇宋建永
Owner NEW H3C TECH CO LTD
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