BNV: Enabling Scalable Network Experimentation through Bare-metal Network Virtualization

New paradigms and architectures, such as Software Defined Networking (SDN), have added an unprecedented increase in the rate of research and development conducted in the field of computer networks. With this increase, there is a rising need for platforms that can enable researchers and operators to experiment with various scenarios involving performance testing, SDN, security research, topology designs, etc. However, the available emulators fail to address fundamental needs of the experiments requiring diverse and scalable set of topologies. In this work, we propose a novel approach to embed arbitrary topologies on a substrate network of programmable ToR switches using our network virtualization technique, called Bare-metal Network Virtualization (BNV). BNV is entirely software configurable and has been implemented on open source software and unmodified OpenFlow-enabled switches. The system has been deployed and currently running in a production testbed in National Cybersecurity Laboratory (NCL) for a year. Our evaluations show that BNV can support various datacenter topologies with less number of switches which can facilitate building a high fidelity, repeatable and isolated experimentation platform for data-center, SDN and security research in computer networks.