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Title: Improving East/Westbound SDN Connectivity via Enhanced Availability
Authors: Santos, Dorabella 
Vidal, Joao P.
Gomes, Teresa Martinez dos Santos 
Martins, Lúcia Maria dos Reis Albuquerque 
Keywords: SDN; controller placement; availability; heuristics; integer linear programming; bi-objective
Issue Date: 21-Nov-2021
Publisher: IEEE
Citation: S. Santos, J. P. Vidal, T. Gomes and L. Martins, "Improving East/Westbound SDN Connectivity via Enhanced Availability," 2021 12th International Conference on Network of the Future (NoF), 2021, pp. 1-9, doi: 10.1109/NoF52522.2021.9609898.
Project: CENTRO-01-0145-FEDER-029312 
Place of publication or event: 12th International Conference on Network of the Future (NoF), 2021
Abstract: The control plane in software-defined networking (SDN) is composed by a logically centralized set of controllers wihich acts as the brain of the SDN network. These controllers need to be connected through east/westbound interfaces in order to have a synchronized view of the network and therefore it is a key issue to guarantee the intercontroller connectivity for a proper network behaviour. In the present work, the problem of controller placement under QoS constraints with the additional requirement of having the intercontroller connectivity with a given availability at minimum cost is addressed as a bi-objective problem. This problem is NP-complete and to tackle it a heuristic approach is proposed based on the problem decomposition into subproblems. In a previous heuristic to solve a less general problem, a similar strategy was followed based on the assumption that a Steiner tree connecting the controllers is the set of links that should be upgraded to achieve the required availability. In this paper a more general sub-graph is considered for intercontroller availability improvement, and an additional optimization level is also considered to address this more general problem. To assess the performance of the proposed heuristic a baseline heuristic to serve as a benchmark is also proposed. Index Terms—SDN, controller placement, availability, heuris-
ISBN: 978-1-6654-2434-9
DOI: 10.1109/NoF52522.2021.9609898
Rights: embargoedAccess
Appears in Collections:I&D INESCC - Artigos e Resumos em Livros de Actas
FCTUC Eng.Electrotécnica - Artigos em Livros de Actas

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