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The convergence of communication and computation portrays a new vision of the services that the Internet can bring to users. There is an emerging need for isolated and protected virtual resource aggregates composed by the sharing in time and space of a set of physical entities. This paper proposes a flexible and open framework to implement this service offering a dynamic access to virtual private interconnected capacities. The authors develop the underlying virtual private execution infrastructure concept and propose a model to control their underlying networks. They illustrate these ideas by describing the adaptation of the HIPerNET software to the context of the experimental large-scale Grid'5000 platform, thus allowing isolated and customised experiments.
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