Method for mutual communication between IPv4 network and IPv6 network

Abstract

New layer of data link layer protocol - data link procedure (DLP) is introduced between IP of network layer and each physical layer in the invention in order to overcome shortage of current method of intercommunication between IPv4 network and IPv6 network. Using DLP defined destination address code and source address code expresses forwarding equivalence class of IP address and source address of IP packet. Using forwarding equivalence class of IP packet as addresses in data link layer realizes forwarding and exchanging IP packets in two layers so as to realize intercommunication between IPv4 network and IPv6 network in data link layer. Features are: high efficiency of forwarding IP packets, safety and reliability, flux engineering capability, 50 ms protected rearrangement function, compatible to packet voice network. The method makes current IP network transits to united telecom public network in next generation smoothly.

Description

technical field [0001] The present invention relates to the field of data transmission on the Internet, which is a method for network intercommunication between Internet Protocol Version 4 (English abbreviated as IPv4) and Internet Protocol Version 6 (English abbreviated as IPv6), specifically how to communicate in IPv4 The method for transmitting IPv6 on the network and transmitting IPv4 on the IPv6 network, the idea proposed by the present invention is mainly used for various routers (core or high-end switching routers, edge or aggregation switching routers, access switching routers), based on grouping (packet) switching Various high / medium / low-end Ethernet switches, multi-service transport platforms (abbreviated as MSTP), integrated access equipment at the client end, and various interconnection and intercommunication equipment related to the Internet. Background technique [0002] At present, Internet technology around the world adopts the fourth version of the Internet ...

AI Technical Summary

Problems solved by technology

[0004] (1) For the first method using tunnel technology, since the entire IPv6 data packet is encapsulated into IPv4 as the payload of IPv4, this is actually equivalent to the upper layer The data undergoes two IP encapsulation processes, first encapsulating the data to IPv6, and then encapsulating to IPv4, which not only increases the processing level, but also increases the overhead, and the technology is very complicated to implement

[0005](2) For the second method using dual-stack technology, it must first ensure that all nodes in the network support dual-stack technology, and each network node supports IPv4 and IPv6 As long as a certain node of the network only supports IPv4 or only supports IPv6, the intercommunication between IPv4 and IPv6 networks cannot be realized. However, most of the current IP network node devices in the world only support IPv4. If dual-stack technology is used to implement IPv4 Intercommunication with the IPv6 network requires all network node equipment to be replaced, so that the user's original network investment is completely scrapped, which is obviously impossible in actual operation

[0006](3) For the second method using dual-stack technology, the node device is required to configure two sets of IP protocol stacks, one for IPv4 and the other for IPv6, so It is very complicated to implement. As we all know, although IP is simpler than other technologies such as ATM (Asynchronous Transfer Mode), the actual implementation is also very complicated. In order to enable a network node device to process and forward IP packets, a lot of protocol processing is required, such as In addition to the IP protocol, there are various routing protocols, user datagram protocols, etc. The use of dual-stack technology is equivalent to requiring node devices to be able to handle the collection of two sets of protocols at the same time, and the actual implementation will be very complicated.

[0007](4) These two intercommunication methods only solve the intercommunication problem between IPv4 and IPv6 networks, that is, how to transmit IPv6 on IPv4 network or transmit IPv6 on IPv6 network The problem of IPv4 does not help to solve some inherent problems of the IP network itself, such as low forwarding efficiency, lack of traffic engineering capabilities, lack of security functions, and lack of network protection switching functions.

[0008](5) In terms of multi-service intercommunication, these two intercommunication methods assume that IP is used to carry multiple services such as data, voice and video, but due to the The network itself has many flaws and deficiencies. It has been proved that relying solely on IP technology itself is not enough to construct the next generation carrier-class unified public network. In the above-mentioned IPv4 and IPv6 interworking network, the traditional voice service is separated from the IP network service, but now it is generally believed that the future unified public network will adopt packet switching technology, which can realize the transmission of voice, IP data and video. The configuration method is not helpful for how to realize the packetized voice service and packetized video (TV) service, and how to integrate the packetized voice service and packetized TV service with the IP network, etc.

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