SWAN: End-to-End Orchestration for Cloud Network and WAN

Networking Virtualization abstracts the underlying networking away from the tenants in multiple-tenant cloud data center (DC). Thus the tenants can apply their policies, manage their address space, group and migrate their VMs independently. The DCs are interconnected by Wide Area Network (WAN). To provide virtual network across multiple DCs is a desirable feature. The bandwidth of WAN is, however, a scarce resource. And the different encapsulation of packet in the DC and WAN causes the mechanism to handle Quality of Service (QoS) are different. In this paper, we leverage Software-Define Networking to achieve network virtualization in the DC orchestrated by OpenStack and convey the application level QoS from the DC to the WAN. We design an end-to-end DC and WAN orchestration architecture to extend the network virtualization across multiple DCs with application level QoS awareness and consistency.