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Method and device for switching the network address of IP message

A network address translation and IP packet technology, applied in the field of TCP/IP packet forwarding, can solve the problems of fragmented packet ID conflicts, high cost of device performance improvement, and inability to completely solve ID conflicts, so as to improve stability, The effect of avoiding ID conflicts

Active Publication Date: 2011-08-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, there are more fragmented packet ID conflicts.
Especially when doing some performance tests, the ID conflicts of fragmented packets are more obvious. At this time, the ID conflicts are often reduced by improving the forwarding performance of the device and reducing the delay time of the packets, but this still cannot completely solve the ID conflicts, and the device The cost of performance improvement is very high

Method used

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  • Method and device for switching the network address of IP message
  • Method and device for switching the network address of IP message
  • Method and device for switching the network address of IP message

Examples

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Embodiment Construction

[0040] The IP message network address translation method and device of the present invention, after the network address translation, replaces the message identification number in the IP message with a unique correction identification number, and maintains the mapping relationship between the source address, message ID and correction ID ,Such as figure 2 As shown, the network address translation method of the IP message of the present invention comprises:

[0041] Step 201: the step of determining the modification identification number, that is, determining the unique modification identification number of the IP message;

[0042] In step 201, for the fragmented message, the message identification numbers (Identification, ID for short) of all fragments of the same message are the same, and when the fragmented message is the first fragmented message, a unique ID is generated. Create and save the mapping relationship between the source address, message identification number and th...

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Abstract

The present invention provides a method for switching the network address of IP message, wherein the method comprises the following steps: confirming an unique modifying identification number of the IP message; and after executing network address switching to the IP message, replacing the message identification number of the IP message and forwarding the processed message. The method and the device for switching the network address of the IP message can prevent the ID confliction of message and increase the system performance.

Description

technical field [0001] The invention relates to TCP / IP message forwarding, and relates to a method and a device for performing IP message network address translation by using NAT technology. Background technique [0002] As Internet technology continues to grow at an exponential rate, the allocation of precious network addresses to private networks is finally seen as a waste of valuable virtual real estate. Hence the Network Address Translation (NAT) standard, which involves reserving certain IP addresses for reuse by private networks. This private network generally has hundreds of IP terminals or several local area networks. [0003] NAT technology can help solve the troublesome problem of IP address shortage, and can isolate internal and external networks to provide certain network security guarantees. [0004] When NAT technology implements TCP / IP packet forwarding, it only modifies the IP address and port. This has caused some defects in the forwarding of TCP / IP fragm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/12H04L29/06H04L45/741
Inventor 祝华锋
Owner ZTE CORP