Providing experimentation facilities in urban-scale infrastructures such as Smart City testbeds is a priority -and a challenge. Real-time performance, security, resource allocation and network convergence are only few of the issues to be tackled in order to provide proper and flexible Experimentation as a Service (EaaS) facilities in city-scale infrastructures. Software Defined Networking (SDN) and Network Function Virtualisation (NFV) appear as important enablers for providing such largescale

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... estbeds, while promoting them as completely open programmable infrastructures. In this paper, we take the position of emerging applications or services designers/programmers that have stringent network requirements and want to know how to benefit from EaaS provided by open programmable (city-scale) infrastructures. Our focus is to evaluate the impact of SDN and NFV systems running real-time applications with low end-to-end latency and high bandwidth requirements correlated.