Method and system for implementing switch chip openflow flow table priority

Abstract

The invention provides a method and a system for achieving priority of Openflow switchboard chip flow tables. The method comprises the following steps of: establishing an Hash table which is stored with a plurality of Openflow priority values and correspondingly establishing a sequencing table for sequencing all priority values in the Hash table from big to small; enabling each priority value to be corresponding to one group of Hash data, wherein each group of Hash data includes a plurality of entry_id values corresponding to an ACL (Access Control List), and the hash data is stored in one entry_id link list; re-sequencing all priority values in the Hash table according to the sequence of the priority values in the sequencing table; acquiring the priority sequence of the entry_id values according to the sequenced Hash stable, and correspondingly sequencing an ACL table of the switchboard according to the priority sequence. According to the invention, an ACL function on the traditional switchboard chip is utilized to achieve a flow table priority function satisfying an Openflow protocol, and moreover, an achieving manner is simple.

Description

technical field [0001] The invention relates to the Ethernet communication technology, in particular to a method and a system for realizing the priority of the switch chip Openflow flow table. 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 switc...

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Problems solved by technology

However, the traditional switch chip must require the user to specify a value (entry_id) to represent its position order in TCAM (that is, priority), and this value must be unique, while the priority of Openflow can have the same value, that is, not It is not unique, so the technology of using the entry_id in the ACL of the traditional switch to specify the priority of the flow cannot meet the protocol requirements of Openflow

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