Method and switch for realizing forwarding of dynamic tunnel message

Abstract

The invention discloses a method and a switch for realizing forwarding of a dynamic tunnel message. The switch is positioned at the edge of an IPv6 network and comprises a central processing unit (CPU) and an application-specific integrated circuit (ASIC); the method comprises the following steps: presetting an aggregation router table entry of a dynamic tunnel in an ASIC hardware forwarding table in a three-layer switch at the edge of the IPv6 network as a pointed CPU; after the switch receives an IPv6 message, sending the message to the CPU according to the aggregation router table entry if the switch searches and judges that the message points to the dynamic tunnel according to an IPv6 router; after the CPU receives the message, adopting a mode of software router to reserve the corresponding relationship between the acquired two-layer information and the IPv6 destination address prefix of the message, and synchronizing the corresponding relationship into the ASIC hardware forwarding table, and forwarding the message from the corresponding outlet port. In the invention, the ASIC forwarding resources can be utilized fully, and the searching efficiency of the router is improved.

Description

technical field [0001] The invention relates to data communication technology, in particular to a method and switch for realizing dynamic tunnel message forwarding. Background technique [0002] With the rapid development of the scale of the Internet, many limitations of the initial design of the IP protocol have become increasingly prominent. In particular, the original 32-bit IP address space is far from meeting the current development needs of the Internet. In this case, the IPv6 protocol came into being. Although the transition from the IP protocol to the IPv6 protocol will be a historical necessity, this process does not happen overnight. In the process of deploying IPv6 networks, IPv4 networks will definitely exist on a large scale. In the process of solving the problem of transition from IPv4 to IPv6 network, many transition technologies have been promoted, among which tunnel technology and dual-stack technology are the most concerned. Since the tunnel technology ...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and switch for realizing dynamic tunnel message forwarding, so as to solve the technical bottleneck that ASIC fast forwarding cannot be realized on the existing three-layer switch

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