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Method, device and system for network address translation nat

A network address translation and equipment technology, applied in the field of communication, can solve the problems of user packet discarding, insufficient NAT processing capability, user service interruption, etc.

Active Publication Date: 2021-09-07
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a method, device, and system for NAT processing, which are used to solve the problem in the prior art that when the CGN device connected to the CR fails or the NAT processing capability is insufficient, user packets are discarded, resulting in user Technical Issues for Business Interruption

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  • Method, device and system for network address translation nat
  • Method, device and system for network address translation nat
  • Method, device and system for network address translation nat

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Embodiment Construction

[0052] The application scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the evolution of the network architecture With the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0053] In the embodiment of this application, "user message" mainly refers to a message sent from a user with a private IP address, and a user message with a private IP address can only be forwarded in a local area network. To connect to the public network, these private network user packets need to be forwarded in the public network after NAT processing.

[0054] In the embodiment of the present application, the CGN device...

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Abstract

The present invention relates to the field of communication, in particular to a method for network address translation NAT. The method includes: CR detects the running state of a CGN device connected to it, and the CGN device is used to perform NAT processing on user messages received by the CR. When the CR detects that the NAT processing capability of the CGN device connected to it is insufficient or the CGN device fails, the CR sends a first notification message to the BRAS connected to it, wherein the first notification message is used to trigger the BRAS to start the BRAS Received user packets are processed by NAT. After the BRAS receives the first notification message sent by the CR, the BRAS starts to perform NAT processing on the user message received by the BRAS. In this method, when the CGN equipment fails, the CGN single board on the BRAS can continue to perform NAT conversion on user packets that need to be NAT-processed, so as to avoid interruption of user services.

Description

technical field [0001] The present application relates to the communication field, in particular to a method, device and system for Network Address Translation (NAT in English: Network Address Translation, NAT for short). Background technique [0002] Broadband Remote Access Server (English: Broadband Remote Access Server, referred to as: BRAS) is the link between the broadband access network and the backbone network. Requirements for transmission capacity and bandwidth utilization. Access users of the BRAS are divided into public network users and private network users. The private network users specifically refer to private Internet Protocol (English: Internet Protocol, IP for short) address users. When a private network user needs to communicate with the Internet (Internet in English), it is necessary to perform NAT processing on the private network user message to convert the private IP address into a global IP address, that is, it is necessary to convert the source IP ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L12/28
CPCH04L12/287H04L61/256H04L61/2567H04L61/2589
Inventor 杜树利
Owner XFUSION DIGITAL TECH CO LTD