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Exploring the Impact of Critical Programmability on Controller Placement for Software-Defined Wide Area Networks | IEEE Journals & Magazine | IEEE Xplore

Exploring the Impact of Critical Programmability on Controller Placement for Software-Defined Wide Area Networks


Abstract:

Control latency is a critical concern for deploying Software-Defined Networking (SDN) into Wide Area Networks (WANs). A Software-Defined WAN (SD-WAN) can be divided into ...Show More

Abstract:

Control latency is a critical concern for deploying Software-Defined Networking (SDN) into Wide Area Networks (WANs). A Software-Defined WAN (SD-WAN) can be divided into multiple domains controlled by multiple controllers with a logically centralized view. The control latency is related to the placement of controllers and mappings between switches and controllers. Existing solutions usually consider the propagation delay between switches and controllers as the evaluation metric and fail to consider many important factors of dynamic network states. In this paper, we propose ProgrammabilityExplorer (PE) to optimize the control latency in SD-WAN. Inspired by the selection of critical flows, which have a critical impact on network performance, PE considers the programmability of critical flows at switches and uses this metric to decide the placement of controllers and mappings between switches and controllers. Simulation results show that PE can reduce the control latency by up to 62.3%, 27.5%, 58.3%, and 61.7% under GÉANT, Abilene, Sprintlink, and Tiscali topologies respectively, compared with baseline algorithms.
Published in: IEEE/ACM Transactions on Networking ( Volume: 31, Issue: 6, December 2023)
Page(s): 2575 - 2588
Date of Publication: 13 April 2023

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