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Method and system for realizing Openflow multi-stage flow tables on basis of ternary content addressable memory (TCAM)

A flow table and flow entry technology, applied in the Ethernet field, can solve the problems of low utilization rate of TCAM, difficulty in meeting application requirements, and insufficient storage entries of TCAM flow table, etc., so as to increase the number of storage entries and reduce the manufacturing cost. Effect

Inactive Publication Date: 2012-12-26
SUZHOU CENTEC COMM CO LTD
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Problems solved by technology

[0004] However, in the prior art, a common Openflow switch has only one ordinary flow table, and the length of the matched matching field is a fixed value (320 bits), so the defect of this technology is that the number of entries stored in the TCAM flow table is not enough, resulting in TCAM utilization rate is low, it is difficult to meet different application requirements

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  • Method and system for realizing Openflow multi-stage flow tables on basis of ternary content addressable memory (TCAM)

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[0030] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0031] ginseng figure 1 As shown, it is the network architecture of the Openflow switch system of the present invention, which includes one or more controllers (controller1, controller2, controller3...controllerN), and the controllers are connected to the Openflow switch (one or more) through a control network. The other end of the Openflow switch is connected to multiple terminal devices (terminal 1, terminal 2, terminal 3...terminal N) through multi-service ports. The above-mentioned terminal devices may include mobile phones, computers, PDAs (personal digital processing), etc. The terminal can comm...

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Abstract

The invention provides a method and a system for realizing Openflow multi-stage flow tables on the basis of a ternary content addressable memory (TCAM). The method comprises the following steps of: S1, dividing a TCAM table maintained on an Openflow switch into multiple logical flow tables; and S2, setting the matched domain type for each logical flow table. The TCAM table is divided into multiple logical flow tables and the matched field length of each flow table comprises multiple forms, so that storage items of the TCAM table are effectively increased, different application requirements are met and the manufacturing cost of the Openflow switch is effectively reduced.

Description

technical field [0001] The invention relates to the technology in the field of Ethernet, in particular to a method and system for realizing Openflow multi-level flow table based on TCAM. Background technique [0002] At present, the rapid development of the Internet, the huge application scale and the importance of its status are far beyond the imagination of the designers. However, the current Internet mainly has the following disadvantages: there is no unified management, network forwarding mechanism and strategy within a specific scope Single, it is difficult for operators to optimize their own networks to the maximum extent, and the functions and protocols used by traditional switches for forwarding are numerous and complex, difficult to configure, and the system is prone to errors. In order to deal with the above-mentioned disadvantages, people have proposed the Openflow switch, which separates the packet forwarding and forwarding strategy on the traditional switch, and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
Inventor 赵怡闫兴安
Owner SUZHOU CENTEC COMM CO LTD
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