Method for GRE tunnel crossing network address translation apparatus and network address translation apparatus

A technology of network address translation and GRE tunnel, which is applied in the field of methods and network address translation equipment, and can solve problems such as impracticability

Active Publication Date: 2009-07-22
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, if a GRE tunnel is required in the case of limited public network addresses, it cannot be realized

Method used

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  • Method for GRE tunnel crossing network address translation apparatus and network address translation apparatus
  • Method for GRE tunnel crossing network address translation apparatus and network address translation apparatus
  • Method for GRE tunnel crossing network address translation apparatus and network address translation apparatus

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] The present invention provides a method for a GRE tunnel to pass through a network address translation device, which is applied to a private network and a public network separated by a network address translation device, the private network has multiple private network devices, and the public network has a public network device , the network address translation device is connected to the public network device through a unique public network...

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Abstract

The invention discloses a method of GRE tunnel traversing network address conversion equipment and network address conversion equipment applied in private network and public network separated by the network address conversion equipment; the private network comprises a plurality of private network devices; the public network comprises a public network device; the network address conversion equipment is connected with the public network device through the unique public network address. In the invention, the GRE marks carried in GRE message received by the network address conversion equipment causes the network address conversion equipment can differentiate the different data from the private network side according to the GRE marks; and a plurality of GRE tunnels are built between the private network side and the public network side using limited public network address, which realizes the GRE tunnel traversing network address conversion equipment.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for GRE (Generic Routing Encapsulation, general routing encapsulation) tunnel passing through a network address translation device and the network address translation device. Background technique [0002] In the GRE protocol proposed by the prior art, the datagrams of some network layer protocols such as IP (Internet Protocol, Internet Protocol) and IPX (Internet work Packet Exchange, Internet Data Packet Exchange) protocols are encapsulated, so that these are encapsulated The datagram can be transported in another network layer protocol such as IP. The GRE protocol is a layer-3 tunneling protocol of a VPN (Virtual Private Network, Virtual Private Network), and a Tunnel (tunnel) technology is adopted between protocol layers. Tunnel is a virtual point-to-point connection. In practice, it can be regarded as a virtual interface that only supports point-to-point conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/56H04L29/06H04L29/12
Inventor 王军周迪
Owner NEW H3C TECH CO LTD
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