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State-dependent data forwarding

A technology of data and state, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve problems such as waste and limit the scale of SDN controllers

Active Publication Date: 2016-10-26
HUAWEI CLOUD COMPUTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach is quite wasteful as all frames need to be sent to the SDN controller and back to the FE, thus limiting the size of the SDN controller due to the need to track a large number of data flows

Method used

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Examples

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Embodiment Construction

[0058] Software-defined networking (SDN) is a networking approach in which control is decoupled from hardware and provided to software applications running on hardware elements. Under SDN, a forwarding element may consist of a programmable application running on an FE that determines the path of a data packet through the network.

[0059] As used herein, the phrase "forwarding element" (also denoted herein as FE) means any piece of hardware that inputs a data packet and outputs the data packet to the next destination in the data packet's route toward the data packet's final destination, software or firmware element. The terms "forwarding entity" and FE are not limited to any particular type of network element or protocol. Switches and routers are non-limiting examples of FEs.

[0060] Embodiments herein provide state-dependent forwarding of data by forwarding elements (FEs). FE keeps track of state information associated with a given data flow. By tracking state informatio...

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Abstract

A method for forwarding a data flow of multiple data packets according to a protocol adapted for locally-managed data forwarding in a software-defined networking (SDN) architecture includes entering each data packet of the data flow of multiple data packets to a data communication forwarding entity(FE). At the forwarding entity, the next destination of the data packet is selected by applying state machine logic to at least one field of the data packet and to state information tracked by the forwarding entity before the data packet is received. The state machine logic includes rules for forwarding the data packet.

Description

technical field [0001] none Background technique [0002] In some embodiments of the invention, the invention relates to state-dependent data forwarding, and in particular, but not exclusively, to state-dependent data forwarding in software-defined networking. [0003] OpenFlow is an emerging standard and protocol for creating software-defined networks (SDN). The OpenFlow protocol contains programmable forwarding elements, which are characterized by their ability to be programmed by an external controller. The controller programs an OpenFlow Forwarding Element (FE), also called a forwarding entity, by adding entries to a forwarding table whose structure is also defined by the OpenFlow protocol. The premise in OpenFlow and SDN is that the first frame of each new data flow is sent to the controller, which in turn sends forwarding rules to all participating FEs after analyzing the frame header. All subsequent frames of the same flow are processed by OpenFlow FE and not sent ...

Claims

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Application Information

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IPC IPC(8): H04L12/715H04L12/721
CPCH04L45/38H04L45/44H04L45/302H04L45/64H04L41/20H04L49/15
Inventor 哈依姆·珀拉特
Owner HUAWEI CLOUD COMPUTING TECH CO LTD
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