Testing and evaluating new architectural propositions is a challenge. Given the usual variety of technologies and scales involved in the necessary evaluation, a one-size-fits-all approach does hardly suffice. Instead, a collection of evaluation and experimentation methods must be chosen for a comprehensive testing of the proposed solutions. This paper outlines some of the approaches chosen for an architectural proposition that establishes a publish/subscribe-based internetworking layer for the Future Internet. For that, we outline challenges we identified when turning to experimentation as a means of evaluation. We then present the variety of emulation as well as experimental test bed efforts that attempt to address these challenges. While this is not to be seen as a conclusive summary of experimental research in this space, it is an attempt to summarize our efforts as a work-of-progress for others working the architectural field.