Unconstrained Datacenter Networks for the Cloud Era. The value of cloud services lies in the rapid and cost-effective instantiation of applications that can be consumed by users anywhere. Enterprises expect cloud services to increase their agility in turning up applications while simplifying their operations. For cloud services to thrive, the networks within and across datacenters must evolve to become as virtualized and readily available as the server and storage infrastructure. For the business value of cloud services to be delivered, compute and network resources must both be dynamic and instantly available.