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Method, device and system for realizing redundant backup of network address translation (NAT) equipment

A technology of redundant backup and equipment, applied in the field of communication, can solve the problems of session interruption, inability to implement multiple NAT device backup, and prone to single point of failure, etc., to achieve the effect of improving reliability.

Inactive Publication Date: 2010-09-15
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The inventors of the present invention have found that: in the above-mentioned solution, NAT device redundancy backup is not implemented, and single point failures are prone to occur in actual use
Assuming that a session is originally transferred through NAT device 1, if NAT device 1 fails, the session needs to be transferred from NAT device 2, but because the information in the address translation table of NAT device 2 is different from that of NAT device 1, As a result, the original session will be forced to be interrupted and the connection needs to be re-initiated
That is to say, in the prior art, even if multiple NAT devices are used, the backup between multiple NAT devices cannot be realized.

Method used

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  • Method, device and system for realizing redundant backup of network address translation (NAT) equipment
  • Method, device and system for realizing redundant backup of network address translation (NAT) equipment
  • Method, device and system for realizing redundant backup of network address translation (NAT) equipment

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Embodiment Construction

[0035] The detailed description will be described below in conjunction with the accompanying drawings and specific embodiments. However, it should be noted that the following embodiments are only examples for helping to understand the technical solutions, and are not intended to limit the present invention.

[0036] figure 1 It is a simplified schematic diagram of a system implementing NAT device redundancy backup in an embodiment of the present invention. like figure 1 As shown, the NAT device 102 and the NAT device 104 are configured with the same IPv4 address pool and a 96-bit prefix for mapping an IPv4 address to an IPv6 address. Run the Keeplive (keep alive) protocol between the NAT equipment 102 and the NAT equipment 104, determine the Master (active) NAT equipment and the Slaver (standby) NAT equipment from the NAT equipment 102 and the NAT equipment 104, for example, can adopt VRRP ( VirtualRouter Redundancy Protocol, Virtual Router Redundancy Protocol) to determine...

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Abstract

The embodiment of the invention provides a method for realizing the redundant backup of network address translation (NAT) equipment. The method comprises the following steps of: configuring the same IPv4 address pools and a 96-bit prefix for mapping an IPv4 address to an IPv6 address on at least two pieces of NAT equipment; running a keep-alive protocol on the at least two pieces of NAT equipment, and determining master NAT equipment and standby NAT equipment from the at least two pieces of NAT equipment; and processing data packets from a host computer, generating address translation table entries and synchronizing the address translation table entries to an address translation table of the standby NAT equipment by using the master NAT equipment. Through the technical scheme provided by the embodiment of the invention, the redundant backup among a plurality of pieces of NAT equipment can be realized so as to improve the networking reliability of the NAT equipment.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for realizing redundant backup of NAT equipment. Background technique [0002] In the current technology, in NAT-PT (Network Address Translation-Protocol Translator, Network Address Translation-Protocol Translator, hereinafter referred to as NAT device), the host access using IPv6 (Internet Protocol version 6, the sixth version of the Internet protocol) adopts IPv4 (Internet Protocol version 4, the fourth version of the Internet protocol) hosts need to configure a public IPv4 address pool (public IPv4 address pool) on the NAT device to translate internal IPv6 addresses into public IPv4 addresses; at the same time configure a 96-bit The prefix ( / 96prefix) is used to map an IPv4 address in an IPv4 network to an IPv6 address, which is called an IPv4mapped IPv6 address. At the same time, the 96-bit prefix is ​​released on the IPv6 network side to attract IPv6 da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L1/22H04L69/40
CPCH04L29/12367H04L69/40H04L61/251H04L29/12358H04L61/2514H04L12/00
Inventor 徐小虎
Owner HUAWEI TECH CO LTD
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