The transformation of innovative research ideas to production systems is highly dependent on the capability of performing realistic and reproducible network experiments. In this work, we present a hybrid testbed to advocate high fidelity and reproducible networking experiments, which consists of network emulators, a distributed control environment, physical switches, and end-hosts. The testbed (1) offers functional fidelity through unmodified code execution on an emulated network, (2) supports large-scale network experiments using lightweight OS-level virtualization techniques and capable of running across distributed physical machines, (3) provides the topology flexibility, and (4) enhances the repeatability and reproducibility of network experiments. We validate the fidelity of our hybrid testbed through extensive experiments under different network conditions and compare the results with the benchmark data collected on physical devices. We also use the testbed to reproduce key results from published network experiments, such as Hedera, a scalable and adaptive network traffic flow scheduling system.