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A data packet forwarding method and device

A forwarding method and data packet technology, applied in the field of network communication, can solve problems such as inability to forward data packets

Active Publication Date: 2018-11-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The embodiment of the present invention provides a data packet forwarding method and device to solve the problem that the OpenFlow switch cannot forward data packets other than the first packet according to the fourth layer information

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  • A data packet forwarding method and device
  • A data packet forwarding method and device
  • A data packet forwarding method and device

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Embodiment Construction

[0048] In order to enable those skilled in the art to better understand the scheme of the present application. The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0049] During the transmission of IP data packets on the network, IP data packet fragmentation will be carried out. Because the link layer has the feature of Maximum Transmission Unit (MTU), it limits the maximum length of a data frame, and different network types have an upper limit. The MTU of Ethernet is 1500. If the IP layer has a data packet to transmit, and the length of ...

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Abstract

The invention discloses a data packet forwarding method, which is applied to an OpenFlow switch. In the application process of the method, when the first packet of a fragmented data packet arrives at the OpenFlow switch, an index record is generated according to the first packet, and the The index record contains the corresponding relationship between the packet identifier of the data packet where the first packet is located and the fourth layer information in the first packet; when the fragmented data packet corresponding to the first packet is not the first packet When switching, read the fourth layer information in the index record, and forward the fragmented data packets of the non-first packet according to the fourth layer information, thereby solving the problem that the OpenFlow switch cannot The problem of forwarding data packets other than the first packet.

Description

technical field [0001] The present application relates to the field of network communication, in particular to a data packet forwarding method and device. Background technique [0002] OpenFlow (OpenFlow) technology was first proposed by Stanford University, aiming to solve various bottlenecks in the current network facing new services based on the existing TCP / IP technical conditions and innovative network interconnection concepts. Its core idea is to transform the data packet forwarding process that was originally completely controlled by the switch / router into an independent process completed by the OpenFlow switch and the control server. [0003] In the process of forwarding a complete data packet, when the length of the data packet exceeds the maximum transmission unit (Maximum Transmission Unit, MTU) of the link layer, the IP layer will fragment the data packet, and the fragmentation obtained The first data packet is called the first packet. The first packet contains ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/741H04L45/74
CPCH04L45/38
Inventor 沈伟锋钟来军刘洪宽
Owner HUAWEI TECH CO LTD
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