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Matias, J., Garay, J., Jacob, E., Sköldström, P., Ghafoor, A..  2016.  FlowSNAC: Improving FlowNAC with Secure Scaling and Resiliency. 2016 Fifth European Workshop on Software-Defined Networks (EWSDN). :59–61.

Life-cycle management of stateful VNF services is a complicated task, especially when automated resiliency and scaling should be handled in a secure manner, without service degradation. We present FlowSNAC, a resilient and scalable VNF service for user authentication and service deployment. FlowSNAC consists of both stateful and stateless components, some of that are SDN-based and others that are NFVs. We describe how it adapts to changing conditions by automatically updating resource allocations through a series of intermediate steps of traffic steering, resource allocation, and secure state transfer. We conclude by highlighting some of the lessons learned during implementation, and their wider consequences for the architecture of SDN/NFV management and orchestration systems.