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Tunnel packet processing method for implementing IPv6 traversing IPv4 based on network processor

A network processor and tunnel message technology, applied in the field of tunnel message processing, can solve problems such as high manufacturing process, inability to perform version update and function upgrade

Inactive Publication Date: 2008-08-20
上海亿人通信终端有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ASIC provides fast processing capabilities, its flexibility is far from keeping up with the rapid changes in network protocols and standards. A typical ASIC requires a development cycle of 1 to 3 years, and cannot perform version updates and function upgrades. Need is also higher

Method used

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  • Tunnel packet processing method for implementing IPv6 traversing IPv4 based on network processor
  • Tunnel packet processing method for implementing IPv6 traversing IPv4 based on network processor
  • Tunnel packet processing method for implementing IPv6 traversing IPv4 based on network processor

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Embodiment Construction

[0080] See Figure 1. An IPv6 tunnel through IPv4 (IPv6 over IPv4) refers to encapsulating IPv6 data packets with an IPv4 header so that the IPv6 data packets can traverse the IPv4 network structure. In the IPv4 header:

[0081] The value of the IPv4 protocol field is 41 or 47, indicating that this is an encapsulated IPv6 data packet.

[0082] The values ​​of the IPv4 Source Address and Destination Address fields are the IPv4 addresses of the tunnel endpoints. Generally, it is a part of manually configured tunnel information, or a part of the next-hop address automatically obtained from the sending interface that matches the route, or a part of the source IPv6 address or destination IPv6 address in the IPv6 header.

[0083] The present invention is based on the network processor to realize the tunnel message processing method of IPv6 passing through IPv4, which is to use the IPv4 header to encapsulate the IPv6 data packet, so that the IPv6 data packet can traverse the network...

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Abstract

The invention discloses a tunnel message processing method for realizing IPv6 passing IPv4 based on network processor. It is characterized in that IPv4 message is adopted to packaging IPv6 data packet, enabling the IPv6 data packet to transmit on IPv4 network. The method comprises the following steps: a, establishing a complete tunnel for IPv6 passing IPv4; b, each tunnel identifies by a tunnel identification code; c, establishing tunnel information table, IPv6 illegal tunnel address list, routing table and conversation table; d, querying the IPv4 package massage obtained by the said tables and forming the tunnel massage passing IPv4; e, judging and delidding according to the protocol number and destination address in the IPv4 message for ordinary IPv6 routing process for the delidding message. When realizing IPv6 passing IPv4, relevant information is cached through the conversation table and inquiry route is simplified, thereby enabling the system to have the data transmission speed with high performance.

Description

technical field [0001] The invention relates to a tunnel message processing method for realizing IPv6 crossing IPv4 based on a network processor. technical background [0002] The IPv4 protocol is the most important protocol family on the contemporary Internet, and it is a protocol that most computers connected to the Internet must support at this stage. However, with the development of the Internet, some shortcomings of the IPv4 protocol are gradually exposed, the most important of which is the serious shortage of address space. Due to historical reasons, fewer IPv4 protocol addresses are allocated to my country, and the problem of address exhaustion is even more serious. [0003] The IPv6 protocol is designed to replace the IPv4 protocol, also known as the next generation Internet protocol. The IPv6 protocol is proposed to solve some problems and deficiencies in the IPv4 protocol. At the same time, it also improves many aspects, such as routing and automatic configuratio...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L29/06H04L12/56H04L45/741
Inventor 李存张文良曲延光王乃博曹昊阳杨兵
Owner 上海亿人通信终端有限公司
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