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IPv6 transition method and device

A technology of ipv6 address and ipv4 address, applied in the field of communication, can solve the problems of reducing forwarding efficiency, table item occupation, large storage resources, etc., achieve the effect of reducing the number of table items and the number of backtracking logs, and improving forwarding efficiency

Active Publication Date: 2016-09-14
HANGZHOU DPTECH TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides an IPv6 transition method and device to solve the problem that the entries in NAT64 in the NAT64 gateway occupy relatively large storage resources, thereby reducing the forwarding efficiency

Method used

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  • IPv6 transition method and device

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Embodiment Construction

[0048] See figure 1 , is a network architecture diagram in an exemplary embodiment of the present invention, wherein the customer network is an IPv6 network, including many IPv6 hosts; the CPE is the boundary between the customer network and the IPv6 operator network, and since both sides of the CPE are IPv6 networks, Then the CPE can serve as the default router for the IPv6 customer network to access the IPv6 carrier network. The IPv6 operator network includes a NAT64 gateway and a DNS64 server. The DNS64 server can respond to the DNS query of the IPv6 host to the IPv4 server and return the synthesized IPv6 address. The NAT64 gateway is the boundary between the IPv6 network and the IPv4 network, and is used for IPv6 and IPv4 report Mutual translation of text headers. The IPv4 Internet includes DNS servers and IPv4 servers. The DNS server is used to respond to the DNS query of the IPv4 server domain name or public domain name by the DNS64 server; the IPv4 server responds to t...

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Abstract

The invention provides an IPv6 transition method and device. The method comprises the steps of judging whether a destination IPv6 address of a request message contains a destination IPv4 address or not when the request message sent by an IPv6 host is received; converting a source IPv6 address of the request message into a synthesized address containing a source IPv4 address if the destination IPv6 address of the request message contains the destination IPv4 address; recording an address converting relationship of the source IPv6 address and the synthesized address; and sending the request message to an NAT64 gateway, thereby enabling the NAT64 gateway to forward the request message to an IPv4 server according to the source IPv4 address and the destination IPv4 address in the request message. Therefore, the number of table items and the number of backtrace logs on the NAT64 gateway can be reduced, and the forwarding efficiency of the NAT64 gateway is further improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an IPv6 transition method and device. Background technique [0002] With the increasing depletion of IPv4 addresses, more users need to access IPv4 networks through IPv6 networks. In the prior art, the NAT64 mechanism can enable an IPv6 host to access an IPv6 operator network via a CPE (IPv6 router), and access an IPv4 Internet server through a NAT64 gateway. [0003] In the NAT64 mechanism, usually the client host is a single IPv6 host, the CPE is an IPv6 router, and all IPv4<->IPv6 functions are implemented in the NAT64 gateway. Since the NAT64 gateway is usually based on the dynamic sharing of the public network IPv4 address of each flow, the content of the NAT64 address translation that needs to be recorded in the NAT64 gateway is extremely large, occupying a large amount of storage resources and reducing the forwarding efficiency. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L12/749H04L45/741
CPCH04L45/741H04L61/251
Inventor 陈忠良
Owner HANGZHOU DPTECH TECH
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