Recuperação Ciente de QoS e Sensível ao Contexto: Uma Heurística de Tolerância a Falhas para Redes de Backbone

• Igor D. B. Caldeira UFBA
• Italo V. S. Brito UFBA
• Maycon L. M. Peixoto UFBA
• Leobino N. Sampaio UFBA

DOI: https://doi.org/10.5753/sbrc.2018.2467

Abstract

Current fault tolerance strategies in backbone networks usually react based on the condition set by the operator instead of network historical performance data. This can generate congestion or impact the application’s QoS when links fail due to the to new topology and traffic prioritization requirements. In Software Defined Networking (SDN), the logically centralized global network view provides new perspectives to deal with network failures. This paper proposes a hybrid heuristic for locally link failover, providing fast protection, followed by optimizing the flow path with QoS-aware recovery. Experiments emulating the characteristics of the Rede Ipê/RNP showed significant improvements in QoS metrics compared to conventional strategies.

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