Using the depository buffer to mitigate the communications load between SDN switches and the controller

摘要

In this paper we focus on how to efficiently mitigate the traffic without changing the packet routing in SDN networks. We propose a lightweight packet delivery scheme to mitigate the communication load between the SDN controller and switches. Whenever an initial packet-in packet arrives, the packet's data is deposited on the controller, so called a depository buffer, until the destined switch is reached. Simulation environment includes ONOS, Mininet with topology of Fat Tree and Spine leaf. The experimental results show that a significant reduction of the network traffic load can be accomplished, especially when more intermediate switches are getting involved.