Experimentally driven research is key to success in today's Internet. Many test beds support research and development, and product prototyping in communication networks. However, they tend to specialise in particular access technologies or services, or explore near term product offerings, often with limited availability and openness. An open and sustainable large-scale shared experimental facility will allow European industry and academia to innovate today and to design the future Internet. The OneLab2 project will leverage the original OneLab project's PlanetLab Europe test bed and its international visibility to make this facility a reality.OneLab2 is built on three complementary pillars. The Platform Pillar will operate PlanetLab Europe, extending PlanetLab service across Europe, and federating with other PlanetLab infrastructures worldwide. It will integrate new features into the system. The Tools Pillar will enhance the test-bed-native network monitoring service that supports experiments. And the Customers Pillar will meet the needs of the facility's customers by providing them with access to diverse facilities, achieved through federating different types of test bed. An experimental facility must know its customers. OneLab2 will do this by directly involving pilot customers who are testing novel ideas in networking research.OneLab2's coalition assembles some of the most highly respected networking research teams from university and industry labs in Europe. Each team has an active research agenda in new network technologies, network monitoring, or test bed management. OneLab2's success would mean that PlanetLab Europe is established as a competitive and federated facility with international visibility and a broad set of customers, implementing OneLab2's vision and research contributions. PlanetLab Europe will continue to function beyond the end of the project period, providing ongoing services to the research community at large.