System and method for realizing intercommunication between ipv4 network and ipv6 network based on nat64

Abstract

The present invention discloses a system and method for achieving intercommunication between an IPv4 network and an IPv6 network based on an NAT64, and relates to the field of an IPv6 transitory technology. The method includes the following steps: ensuring that an NAT64 module is connected to the IPv4 network and the IPv6 network to achieve global enabling and interface enabling of functions of the NAT64; receiving, by the NAT64 module, a data message sent from a network side, updating a dynamic table, establishing address mapping information which maintains a sub-module, and obtaining an address 5-tuple flow after translation according to the protocol version of the data message; performing, by the NAT64 module, protocol translation on an IPv4 message head and an IPv6 message head; and forwarding, by an IPv4 / IPv6 message forwarding sub-module, a new data message completing the translation of address and the translation of a protocol to a target address. Relevant functions of the NAT64 can be fully achieved on a conventional digital communication product, the performance consumption of equipment and the usage of system resources are effectively reduced, and the working efficiency is increased.

Description

technical field

[0001] The invention relates to the technical field of IPv6 transition, in particular to a system and method for realizing intercommunication between an IPv4 network and an IPv6 network based on NAT64. Background technique

[0002] IPv6 (Internet Protocol Version 6, Internet Protocol Version 6) is the fundamental solution to solve the problem of IPv4 (Internet Protocol Version 4, Internet Protocol Version 4) address exhaustion, but due to the large number of existing IPv4 users, and most of the existing network Does not support IPv6 applications, so it is difficult to evolve the existing network from IPv4 to IPv6.

[0003] In order to ensure the smooth transition of users and services, it is expected that the entire evolution cycle will be a long-term process, that is to say, IPv6 will coexist with IPv4 for a long time. Therefore, the IPv6 transition scheme is particularly important. The IPv6 transition technologies we usually refer to are generally divided...

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