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Main Title: Optimizing Gradual SDN Upgrades in ISP Networks
Author(s): Poularakis, Konstantinos
Iosifidis, George
Smaragdakis, Georgios
Tassiulas, Leandros
Type: Article
Language Code: en
Abstract: Nowadays, there is a fast-paced shift from legacy telecommunication systems to novel software-defined network (SDN) architectures that can support on-the-fly network reconfiguration, therefore, empowering advanced traffic engineering mechanisms. Despite this momentum, migration to SDN cannot be realized at once especially in high-end networks of Internet service providers (ISPs). It is expected that ISPs will gradually upgrade their networks to SDN over a period that spans several years. In this paper, we study the SDN upgrading problem in an ISP network: which nodes to upgrade and when we consider a general model that captures different migration costs and network topologies, and two plausible ISP objectives: 1) the maximization of the traffic that traverses at least one SDN node, and 2) the maximization of the number of dynamically selectable routing paths enabled by SDN nodes. We leverage the theory of submodular and supermodular functions to devise algorithms with provable approximation ratios for each objective. Using real-world network topologies and traffic matrices, we evaluate the performance of our algorithms and show up to 54% gains over state-of-the-art methods. Moreover, we describe the interplay between the two objectives; maximizing one may cause a factor of 2 loss to the other. We also study the dual upgrading problem, i.e., minimizing the upgrading cost for the ISP while ensuring specific performance goals. Our analysis shows that our proposed algorithm can achieve up to 2.5 times lower cost to ensure performance goals over state-of-the-art methods.
Issue Date: 11-Jan-2019
Date Available: 2-Dec-2019
DDC Class: 006 Spezielle Computerverfahren
Subject(s): software defined networks
gradual deployment
ISP networks
Sponsor/Funder: EC/H2020/679158/EU/Resolving the Tussle in the Internet: Mapping, Architecture, and Policy Making/ResolutioNet
Journal Title: IEEE/ACM Transactions on Networking
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Publisher Place: New York, NY
Volume: 27
Issue: 1
Publisher DOI: 10.1109/TNET.2018.2890248
Page Start: 288
Page End: 301
EISSN: 1558-2566
ISSN: 1063-6692
Appears in Collections:FG Internet Network Architectures (INET) » Publications

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