Method for IPv4 server access by IPv6 server based on quasi-static mapping

A server, quasi-static technology, applied in the field of computer networks, which can solve problems such as computer hardware, operating system, application system and service quality, security and manageability limitations

Active Publication Date: 2009-07-15
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although upgrading to dual stack is theoretically feasible, in practice, it will be limited by comp

Method used

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  • Method for IPv4 server access by IPv6 server based on quasi-static mapping
  • Method for IPv4 server access by IPv6 server based on quasi-static mapping
  • Method for IPv4 server access by IPv6 server based on quasi-static mapping

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Embodiment Construction

[0041]The key technology of the method described in the present invention includes: establishing a two-level mapping table between the private IPv4 address 10.0.0.0 / 8 and the IPv6 address for accessing the IPv4 server; address to establish a mapping relationship.

[0042] (1) Establish a two-level mapping table between the private IPv4 address 10.0.0.0 / 8 and the IPv6 address that accesses the IPv4 server

[0043] The present invention sets up a mapping table between the private IPv4 address 10.0.0.0 / 8 and the IPv6 address that visits this IPv4 server, as figure 2 shown. Note that IPv6 addresses have a range of 2 128 , so theoretically speaking, it is impossible to establish a one-to-one mapping relationship with IPv4 addresses, but from actual data analysis, Internet statistics show that active addresses are distributed in a power law, a small number of addresses are very active, and a large number of addresses are very inactive . For most servers, the private address 10....

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Abstract

The invention pertaining to the field of computer network technology provides a method for accessing to an IPv4 server by an IPv6 client on the basis of quasi-state mapping, and the invention is characterized in that private IPv4 addresses are divided into quasi-state stably used addresses and addresses that are used dynamically according to the using frequency of the addresses by using a threshold value, mapping tables of the corresponding two types of private IPv4 addresses and IPv6 addresses needing to access to the IPv4 server are established in an IPv4/IPv6 converter between the Ipv6 network and the IPv4 network, each mapping table is provided with an active time-meter using a unified active standard for judging the active degree of an address after being accessed to each time, an address with an active degree value over the threshold value is dynamically adjusted to the quasi-state mapping table which is made as bigger as possible. The bigger the quasi-state mapping table is, the greater the converter performance improved. According to the invention, how to use an IPv4 server to provide services to an IPv6 user is solved, and limitation of using IPv4/IPv6 dual-stack is got rid of.

Description

technical field [0001] A method for an IPv6 client computer to access an IPv4 server based on quasi-static mapping belongs to the technical field of computer networks. Background technique [0002] The Internet has become the most important information infrastructure in the world, but the addressing range of IPv4, the fourth version of the network protocol widely used on the Internet, is only 2 32 , that is, 4.3 billion addresses. According to the current allocation speed of IPv4 addresses, it is estimated that after 2011, IPv4 addresses will be allocated soon. [0003] At present, the absolute number of Internet users in China has become the first in the world, but the penetration rate of the Internet is only 19%, lower than the average level of the world (21%), and far lower than the level of developed countries in the world (70%). At the same time, each Chinese Internet user has only 0.6 IPv4 addresses on average. Therefore, for China, IPv4 addresses cannot meet the dem...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L45/741
Inventor 李星包丛笑
Owner TSINGHUA UNIV
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