Forwarding method and router for supporting linear speed of IPv6 single multicast operation

A line of business, single-group technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as complex logic control and duplication of functions of IPv6 router components, so as to save logic resources, improve operation stability, and reduce manufacturing costs. cost effect

Inactive Publication Date: 2008-05-21
CHINA NAT DIGITAL SWITCHING SYST ENG & TECH R&D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] In order to solve the problems of repeated functions and complex logic control of previous IPv6 router components, the present invention provides a method for supporting IPv6 single-multicast service line-speed forwarding and a router using the method, which has lower cost and higher stability

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  • Forwarding method and router for supporting linear speed of IPv6 single multicast operation
  • Forwarding method and router for supporting linear speed of IPv6 single multicast operation
  • Forwarding method and router for supporting linear speed of IPv6 single multicast operation

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Embodiment Construction

[0058] Below we will describe in detail the preferred embodiments of the present invention with reference to the accompanying drawings.

[0059] The present invention provides a kind of IPv6 router, its basic structure is identical with existing router, as figure 1 shown. The innovation of the present invention lies in the implementation method of the forwarding engine 20. For the message entering the forwarding engine 20, the present invention synthesizes two independent modules of unicast header processing and multicast header processing in the prior art into a unified header The processing unit supports forwarding of unicast packets and multicast packets at the same time, as shown in FIG. 3 . In order to realize the unified header processing unit's support for unicast and multicast service forwarding, the forwarding behavior of unicast and multicast is analyzed as follows.

[0060] The same points that the forwarding engine 20 processes for unicast and multicast services:...

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Abstract

Message output from line interface module is buffered. Then, output control unit reads out buffered message. Header of message written to a header inspection unit generates unicast and multicast table look up key words to carry out unicast and multicast table look up. Header of message is written into buffered first-in, first-out register of processing header of message. Using result of unicast table look up, result of multicast table look up and the message, the multicast RPF inspection unit obtains RPF inspection result. Synthesizing inspection result of message header, result of unicast, result of multicast RPF, and logic arbitration unit generates inner reporting message header or inner forwarding message header. Repackaging the message by using the inner message header, the inner message generation unit sends generated message to be reported to main control module, and sends generated forwarding message to exchange network. The invention also discloses IPv6 router for the method.

Description

technical field [0001] The invention relates to a wire-speed forwarding method based on hardware in an IPv6 (Internet Protocol Version 6, 6th edition Internet Protocol) router, in particular to a method for wire-speed forwarding of IPv6 unicast and multicast services. Background technique [0002] IPv6 is the Internet protocol of the next generation Internet. Compared with the current IPv4 Internet protocol, IPv6 supports resource allocation and has the advantages of larger address space, better header format and more security. In addition to supporting traditional point-to-point broadcasting, ie, unicast, IPv6 also implements multicasting, ie, multicasting, by defining a scope. This requires routers in the IPv6 network to support both unicast and multicast, and how to implement this function with fewer resources and simpler control becomes an important part of router design. [0003] figure 1 A typical structure of a router is shown. The line interface module 10 receives...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L45/16
Inventor 兰巨龙张兴明刘勤让赵昭灵黄惠群李玉峰
Owner CHINA NAT DIGITAL SWITCHING SYST ENG & TECH R&D CENT
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