Simulation and emulation are popular approaches for experimentation in
Computer Networks. However, due to their respective inherent drawbacks,
existing solutions cannot perform both fast and realistic control plane
experiments. To close this gap, we introduce Horse. Horse is a hybrid solution
with an emulated control plane, for realism, and simulated data plane, for
speed. Our decoupling of the control and data plane allows us to speed up the
experiments without sacrificing control plane realism