Flow table issuing method, system and controller thereof

Abstract

The invention provides a flow table issuing method, a system and a controller thereof and relates to the data communication field. The flow table issuing method comprises the following steps that after receiving a flow table application message from a switch, a controller identifies a type of the flow table application message and determines whether a flow table template corresponding to the type is sent to the switch; if the flow table template is not sent to the switch, the corresponding type of the flow table template is generated and the flow table template is sent to the switch; according to the flow table application message received in predetermined time, the controller generates a flow table group message and sends to the switch, wherein the flow table group message includes flow table information corresponding to each flow table application message in the predetermined time. Through the above method, the controller can generate the corresponding flow table template and send to the switch according to flow table applications, according to the multiple received flow table applications, the flow table group message is generated, batch issuing of flow table information is realized, a message interaction quantity is greatly reduced and reading and writing efficiency is increased.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method, system and controller for issuing a flow table. Background technique [0002] SDN (Software-Defined Networking) proposes a technology for separating the control plane and the forwarding plane. The control plane sends the flow table required for processing packets to the forwarding plane through the OpenFlow protocol. [0003] There are multiple entries in the OpenFlow flow table, and each entry consists of Match and Action. Match is matching feature information, and Action is packet execution action. When a packet enters the forwarding plane, the processor on the forwarding plane extracts the characteristic information of the packet and matches it with the Match item in the flow table, and executes the corresponding action if it matches. [0004] In the prior art, the process of reading and writing the OpenFlow flow table is as follows: figure 1 As shown, the FlowMo...

AI Technical Summary

Problems solved by technology

Reading and writing an entry requires sending and receiving an openflow message. When a large number of entries are updated at the same time, the control plane and the forwarding plane need to interact many times, and the delivery rate of the flow table is low, which causes a relatively large delay in message processing and affects business experience.

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