Dynamic Switch-Controller Association and Control Devolution for SDN Systems
Xi Huang, Simeng Bian, Ziyu Shao, Hong Xu

TL;DR
This paper introduces a dynamic scheme for switch-controller association and control devolution in SDN, improving scalability, reliability, and efficiency by adapting to traffic variations without prior traffic statistics.
Contribution
It presents an innovative online algorithm that jointly optimizes switch-controller association and control devolution, balancing costs and latency in SDN systems.
Findings
Lower communication and computation costs compared to static schemes.
Achieves balanced load distribution among controllers.
Reduces latency and improves system efficiency.
Abstract
In software-defined networking (SDN), as data plane scale expands, scalability and reliability of the control plane have become major concerns. To mitigate such concerns, two kinds of solutions have been proposed separately. One is multi- controller architecture, i.e., a logically centralized control plane with physically distributed controllers. The other is control devolution, i.e., delegating control of some flows back to switches. Most of existing solutions adopt either static switch-controller association or static devolution, which may not adapt well to the traffic variation, leading to high communication costs between switches and controller, and high computation costs of switches. In this paper, we propose a novel scheme to jointly consider both solutions, i.e., we dynamically associate switches with controllers and dynamically devolve control of flows to switches. Our scheme is…
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Taxonomy
TopicsSoftware-Defined Networks and 5G · Caching and Content Delivery · Network Traffic and Congestion Control
