A novel network architecture for data center

To meet the requirements for a scalable, agile and efficient data center, we present DNet, a dual-network structure composed of a primary network and a secondary network. DNet is based on layer 2 fabric, which is considered more agile than layer 3 fabric in data center design. We compress ARP request and move it from the primary network to a secondary one, and we propose a DNet source routing protocol (DSR) for the primary network. We evaluate that, with these characteristics, DNet is enabled to scale to support huge data centers with up to 131K hosts. Besides, DSR simplifies switch design, and decreases the cost and delay.