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Capacity expansion realization method and device of routing forwarding table and switching device

A technology of extended implementation and forwarding table, which is applied in the field of communication and can solve problems such as high cost, limited expansion capability, and high power consumption

Active Publication Date: 2010-11-10
RUIJIE NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The embodiment of the present invention provides a routing and forwarding table capacity expansion implementation method, device, and switching equipment to solve the problems of high cost, high power consumption, and limited expansion capability caused by routing and forwarding expansion in the prior art

Method used

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  • Capacity expansion realization method and device of routing forwarding table and switching device
  • Capacity expansion realization method and device of routing forwarding table and switching device
  • Capacity expansion realization method and device of routing forwarding table and switching device

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Embodiment 1

[0035] The routing and forwarding table capacity expansion implementation device provided by Embodiment 1 of the present invention, the structure of the routing and forwarding table capacity expansion implementation device adopted is as follows Figure 4 As shown, it includes: a central processing unit 10 , a routing and forwarding unit 20 and a co-processing unit 30 . Wherein, the central processing unit (CPU) 10 is connected with the co-processing unit 30 and the routing and forwarding unit 20 through a control bus, the co-processing unit 30 is connected with the routing and forwarding unit 20 through a data bus, and the routing and forwarding unit 20 interacts with the outside to receive and send messages arts. There can be multiple routing and forwarding units, and only one is shown in the figure.

[0036] The central processing unit 10 is used to store the intra-domain routing and forwarding entries generated by the interior gateway protocol in the TCAM, and store the in...

Embodiment 2

[0081] The device for realizing the expansion of the routing and forwarding table capacity provided by the second embodiment of the present invention can expand the device provided in the first embodiment to include multiple routing and forwarding units, and connect each routing and forwarding unit and co-processing through the message exchange unit unit.

[0082] The following takes three routing and forwarding units as an example to illustrate. The structure of the device for realizing the capacity expansion of the routing and forwarding table is as follows: Figure 6 As shown, it includes: a central processing unit (CPU) 10 , routing and forwarding units ( 20 , 21 , 22 ), a co-processing unit 30 and a packet switching unit 40 . Wherein, the central processing unit 10 is connected with the co-processing unit 30 and the routing and forwarding unit (20, 21, 22) through the control bus, and the co-processing unit 30 and the routing and forwarding unit (20, 21, 22) pass the data...

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Abstract

The invention discloses a capacity expansion realization method and device of a routing forwarding table and a switching device. The method comprises the following steps: the intradomain routing forwarding table entry generated by interior gateway protocol is stored in a ternary content addressable memory (TCAM), the interdomain routing forwarding table entry generated by exterior gateway protocol is stored in a mass memory; when a message is received, a routing forward unit is used to search the intradomain routing forwarding table in the TCAM, when the matched intradomain routing forwarding table entry is searched, the corresponding output interface is determined through the searched intradomain routing forwarding table entry to send the message; and when the matched intradomain routing forwarding table entry is not searched, the message is forwarded to a coprocessing unit, and the output interface corresponding to the interdomain routing forwarding table entry which is searched by the coprocessing unit from the memory, is used to send the message. By separately storing the intradomain routing table entry and the interdomain routing table entry, the comprehensive performance of routing forward can be ensured, the capacity of the routing forwarding table can be expanded, the cost can be reduced, and power consumption and other system resources can be saved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for implementing capacity expansion of a routing and forwarding table suitable for switching equipment and switching equipment. Background technique [0002] A layer-3 switch is a switch with an Internet Protocol (Internet Protocol, IP) message routing and forwarding function. To perform IP message routing and forwarding, two tables need to be generated and maintained: a routing table and a routing and forwarding table. The routing table is equivalent to a map in the network world, which describes the paths from point X to point Y, while the routing table is the optimal path selected from multiple paths from point X to point Y according to certain principles. [0003] The data processing of routing and forwarding is mainly divided into control plane processing and data plane processing. The processing of the control plane is mainly to generate a routin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/74
Inventor 王肖军
Owner RUIJIE NETWORKS CO LTD
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