Hot backup method of NAT service and equipment

A technology of hot backup and equipment, applied in the field of communication, can solve problems such as connection interruption

Inactive Publication Date: 2010-05-05
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem with it is that the user's connection will be interrupted when the traffic is switched

Method used

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  • Hot backup method of NAT service and equipment
  • Hot backup method of NAT service and equipment
  • Hot backup method of NAT service and equipment

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Embodiment Construction

[0052] In order to make the present invention clearer and clearer, the following description will be described in detail in conjunction with the accompanying drawings. The invention provides a hot backup method for NAT services, which is applied to a system including active NAT equipment and standby NAT equipment with the same configuration. like figure 1 As shown, the method includes the following steps:

[0053] Step s101, when the primary NAT device receives a data packet to be forwarded from the intranet, judge whether it is necessary to newly establish NAT session information; if yes, proceed to step s102, otherwise forward the data packet according to the established NAT session information, and proceed to step s105 ;

[0054] Step s102, when the judgment result is yes, the primary NAT device newly establishes NAT session information and forwards the data packet according to the newly established NAT session information;

[0055] Step s103, the primary NAT device judg...

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Abstract

The invention discloses a hot backup method of an NAT service converted by a network address and equipment. NAT session information in the equipment is screened, backup is carried out only on the NAT session information which conforms to conditions; if the addresses of the NAT equipment in a public network address pool are more, the quantity of the NAT session information needing backup is less, so that the performance of the newly established session on the NAT device is not influenced, and many-for-one backup can be realized.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a hot backup method and equipment for NAT services. Background technique [0002] In order to improve processing performance, a distributed structure is currently adopted on high-end switches and routers, and each interface board generally adopts CPU (Centre Processing Unit, central processing unit) + NP (Network Processor, network processor) / ASIC (Application Specific Integrated Circuit (ASIC) chip combination for high-speed data processing, CPU completes configuration and control, NP and ASIC complete message processing and forwarding, NP / ASIC can independently complete basic routing and forwarding and other basic services. Under the general distributed structure, the processing flow will be divided into upstream flow and downstream flow. The upstream flow refers to a series of packet information extraction, flow classification, and QoS (Quality of Service) after the pac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/56H04L1/22H04L29/12
Inventor 卢胜文
Owner NEW H3C TECH CO LTD
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