Zhenhua is a staff software engineer with Paypals' cloud engineering team. He works on OpenStack and SDN to bring availability, scaliblility and security to one of the largest online payment systems in the world. Before that, he was with Cisco's Enterprise Networking Group building switches while drinking beer. He has significant contributions to L2/L3 multicast, Mobility for the catalyst series. Zhenhua holds a PH.D in computer engineering from Virginia Tech and a BE in information engineering from Beijing Institute of Technology.