IPv6 address conversion method

Abstract

The invention discloses an IPv6 (Internet Protocol Version 6) address conversion method, which comprises the following steps that: 1, a host Host A sends an IPv6 message to a switch S; 2, the switch Sforwards the message to NAT equipment FW-S; 3, the NAT equipment FW-S completes replacement of the header of the IPv6 message and adds an SDNAT header to the IPv6 message to complete conversion; 4, forwarding the IPv6 message added with the SDNAT header to a network; 5, the NAT equipment FW-D receives the IPv6 message through the network, checks the IPv6 message, converts the IPv6 message, and forwards the converted message to a switch D; and 6, the IPv6 message arrives at the switch D, the switch D completes checking of the old check sum, if the old check sum is qualified, the check sum is calculated again, the SDNAT header is removed, and then the message is forwarded to a host Host B; and if the old check sum is unqualified, the message is discarded. According to the conversion method,the address conversion process and the process of recalculating the check sum can be separated, the pressure of the NAT equipment is reduced, and the method has the characteristic of assigning the task of calculating the check sum to an edge switch.

Description

technical field [0001] The invention relates to IP network technology, in particular to an IPv6 address conversion method. Background technique [0002] The typical representative of modern computer network is the Internet (Internet). The birth and prosperity of the Internet is one of the symbols of the progress of modern human society. All hosts that communicate on the Internet need to have IP addresses, and how to obtain and use IP addresses is regulated by the IP protocol cluster. There are currently two main versions of the IP protocol cluster: IPv4 version and IPv6 version. The IP address in the IPv4 version is 32 bits, and the IP address in the IPv6 version is 128 bits. The 32-bit address length gradually cannot meet the communication needs during the development process, because the number of hosts that can be represented by a 32-bit IP address is 2 32 , and the number of hosts connected to the network equipment has far exceeded this number. Therefore, IETF propos...

AI Technical Summary

Problems solved by technology

The 32-bit address length gradually cannot meet the communication needs during the development process, because the number of hosts that can be represented by a 32-bit IP address is 2 32 , and the number of hosts connected to the network equipment has far exceeded this number

But this also creates a new problem: if the hosts in these private networks want to go online, how to solve it?

[0011] Because NAPT equipment often undertakes a large number of private network users to access the Internet, that is, a large number of address conversions and a large number of checks and calculations are required, which puts forward higher requirements on the performance of NAPT equipment, resulting in relatively expensive equipment prices.

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