Reducing Packet-In Messages in OpenFlow Networks
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Abstract
In OpenFlow networks, several packet-in traffic messages are sent to the controller to request routes from any switch on the network. Executing these packet-in messages and replying to control messages may interfere with the controller performance. Therefore, a mechanism for lightening the load on the controller by reducing packet-in traffic between the controller and the switch is proposed in this research. The proposed system operates by responding to the two flow entries for each request and removing packet-in messages from some unused multicast traffic. The proposed system can thus not only avoid a third packet-in message but also some multicast packet-in traffic, thereby reducing the load and traffic in the network as well as packet loss. According to the evaluation results, the proposed system can improve network performance by significantly reducing packet-in overhead.
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