Hierarchical SDN for the hyper-scale, hyper-elastic data center and cloud
Luyuan Fang, Fabio M. Chiussi, Deepak Bansal, Vijay Gill, Tony Lin, Jeff Cox, Gary R. Ratterree · 2015
With the explosive growth in the demand for cloud services, the Data Center and Data Center Interconnect have to achieve hyper-scale and provide unprecedented elasticity and resource availability. The underlay network infrastructure has to scale to support tens of millions of physical endpoints at low cost; the virtualized overlay layer has to scale to millions of Virtual Networks connecting hundreds of millions of Virtual Machines (VMs) and Virtualized Network Functions (VNFs), and provide seamless VM and VNF mobility.