Message transmission method and device

A message transmission and message technology, applied in the field of communication, can solve the problem that the message cannot pass through the NAT device.

Active Publication Date: 2018-10-16
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0006] This application provides a message transmission method and device to solve the problem that t

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  • Message transmission method and device
  • Message transmission method and device

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Embodiment Construction

[0121] NAT is a conversion technology that converts an IP address of a private network (hereinafter referred to as a private network IP address) into an IP address of a public network (hereinafter referred to as a public network IP address). In practical applications, NAT is mainly used to enable private networks to access public networks. Through NAT, users corresponding to more private network IP addresses can access the network while using a small number of public network IP addresses. NAT not only perfectly solves the problem of insufficient IP addresses, but also can effectively avoid attacks from outside the network, hide and protect computers in private networks.

[0122] The basic working principle of NAT is: when the device on the private network side (hereinafter referred to as the private network side device) communicates with the device on the public network side (hereinafter referred to as the public network side device) through the NAT device, the NAT device send...

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Abstract

The invention provides a message transmission method and device and is used for solving the problem that a message cannot pass through an NAT (Network Address Translation) apparatus when communicationis carried out between VTEPs (VXLAN Tunnel End Points) through the NAT apparatus. The method is applied to a VXLAN (Virtual Extensible LAN). The VXLAN comprises a first VTEP, a second VTEP and the NAT apparatus. The first VTEP communicates with the second VTEP through the NAT apparatus. The first VTEP is in a public network. The second VTEP is in a private network. The method comprises the stepsthat the first VTEP carries out VXLAN packaging on a first message to obtain a second message; the first VTEP sends the second message to the second VTEP through the NAT apparatus; and the second VTEPcarries out VXLAN unpackaging on the received second message, thereby obtaining the first message, wherein the first message is a to-be-sent message of the first VTEP, a destination port number of the second message is obtained according to a destination IP (Internet Protocol) address of the second message, and a source port number of the second message is a preset port number.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a message transmission method and device. Background technique [0002] With the development of Internet technology, NAT (Network Address Translation, Network Address Translation) technology and VXLAN (Virtual Extensible LAN, Virtual Extended Local Area Network) technology have been widely used. Among them, VTEP (VXLAN Tunnel End Point, VXLAN tunnel end point) is used to encapsulate / decapsulate VXLAN packets. [0003] When the VTEP encapsulates the packet to be sent, the source port number of the encapsulated packet is obtained randomly or through the HASH algorithm, and the destination port number is the preset port number 4789. Due to the above-mentioned VXLAN packet sending mechanism, when the two VTEPs are located on the private network side and the public network side respectively, if a NAT device is deployed in the carrier network, when the two VTEPs...

Claims

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Application Information

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IPC IPC(8): H04L29/12
CPCH04L61/2503H04L61/256H04L61/2575H04L12/4633H04L2012/4629H04L45/66H04L45/50H04L12/4679H04L61/2592
Inventor 徐卫平龙华何宏伟刘树成江元龙
Owner HUAWEI TECH CO LTD
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