eNd to End scalable and dynamically reconfigurable oPtical arcHitecture for application-awarE SDN cLoud datacentErs
PCRL is coordinating NEPHELE project, developing a dynamic optical network infrastructure for future scale-out, disaggregated datacenters. NEPHELE’s end-to-end solution extends from the datacenter architecture and optical subsystem design, to the overlaying control plane and application interfaces. NEPHELE builds on the enormous capacity of optical links and leverages hybrid optical switching to attain the ideal combination of high bandwidth at reduced cost and power compared to current datacenter networks.
A fully functional control plane overlay is being developed, comprising a Software-Defined Networking (SDN) controller along with its interfaces. The southbound interface abstracts physical layer infrastructure and allows dynamic hardware-level network reconfigurability. The northbound interface links the SDN controller with the application requirements through an Application Programming Interface. NEPHELE’s innovative control plane merges hardware and software virtualization over the hybrid optical infrastructure and integrates SDN modules and functions for inter-datacenter connectivity, enabling dynamic bandwidth allocation based on the needs of migrating VMs and existing Service Level Agreements for transparent networking among telecom and datacenter operators’ domains.