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Data transmission method based on GRE tunnel, device and system

A data transmission method, GRE tunnel technology, applied in the field of data transmission based on GRE tunnel, can solve the problems of transmission efficiency drop, jitter, tunnel transmission data disorder, etc.

Inactive Publication Date: 2013-04-03
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the device sends a large data packet, if the encapsulated data packet exceeds the MTU threshold of the device interface, the data packet cannot be transmitted normally.
[0028] At this time, if the device does not support fragmentation, the transmission of data packets will be interrupted; if the device supports fragmentation, the GRE tunnel will transmit a large number of fragmented data packets, which will further reduce the transmission efficiency. After the file is reassembled and decapsulated, it will cause network problems such as out-of-order data transmission and jitter in the tunnel

Method used

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  • Data transmission method based on GRE tunnel, device and system
  • Data transmission method based on GRE tunnel, device and system
  • Data transmission method based on GRE tunnel, device and system

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Embodiment Construction

[0089] In the present invention, by distributing a unique flow label for the data message with the same source IP address and destination IP address, and creating the first data message GRE tunnel flow label forwarding entry according to the flow label, thereby the The packet GRE tunnel flow label forwarding entry is used to transmit data packets, reducing the packet bytes added after encapsulation, and improving the data transmission efficiency of the GRE tunnel.

[0090] The present invention provides a data transmission method based on a GRE tunnel, which is applied to a system including a sending end and a receiving end. The sending end and the receiving end are two ends of a GRE tunnel, and the sending end sends For the first data message, the first data message GRE tunnel flow label forwarding entry is stored in the sending end and the receiving end and its state is Forwarding state, such as image 3 As shown, the method includes the following steps:

[0091] Step 301, ...

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Abstract

The invention discloses a data transmission method based on a GRE tunnel, which comprises the following steps that a transmitting terminal deletes a self-contained IP head of a first datagram according to the GRE tunnel flow label forwarding entry of the first datagram, the first datagram is encapsulated into a second datagram with a flow label, and then the second datagram is sent to a receivingterminal; the receiving terminal receives the second datagram, de-encapsulates the second datagram according to the GRE tunnel flow label forwarding entry of the first datagram, and re-encapsulates the second datagram into the first datagram to be forwarded. In the invention, increased message bytes after encapsulation are reduced, the data transmission efficiency of the GRE tunnel is increased, and the problem that the datagram can not be transmitted via the GRE tunnel is solved.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a data transmission method, device and system based on a GRE tunnel. Background technique [0002] GRE (Generic Routing Encapsulation, General Routing Encapsulation) protocol is an encapsulation protocol. GRE provides the ability to encapsulate data packets of one network layer protocol (such as IP, IPX, AppleTalk, etc.) in packets of another protocol. mechanism, and enables the encapsulated message to be transmitted in another network layer protocol (eg, IP). Wherein, the channel through which the message is transmitted is called a Tunnel (tunnel). [0003] Specifically, a tunnel is a virtual point-to-point connection that provides a path for transmitting encapsulated data packets. When using a tunnel for packet transmission, data packets need to be encapsulated at both ends of the tunnel. and unpack. [0004] Such as figure 1 The schematic diagram of the inter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L12/741H04L45/74
Inventor 蒋益群顾雷雷
Owner NEW H3C TECH CO LTD