Introduction

SONA(Simplified Overlay Network Architecture) is an optimized tenant network virtualization service for Cloud-based data center. Basically, it is a set of ONOS applications which provides OpenStack Neutron ML2 mechanism driver and L3 service plugin. The implementation for provisioning an isolated virtual tenant network uses VXLAN based L2 tunneling with Open vSwitch as a network hypervisor. It also provides horizontal scalability of a gateway node, which plays a role of connecting SONA controlled virtual networks to the outside of the world via BGP.

Features

• Optimized and distributed logical switching: SONA implements multicast free VXLAN implementation where each OVS in the compute node act as a part of big switch.

• Optimized and distributed logical routing : Each OVS in the compute node act as a router and takes care of all East-West routed traffic for the VMs connected to itself.

• Broadcast free : SONA proxies ARP and DHCP request from a virtual instance.

• Agentless : No need to run any Neutron agents on compute node or gateway node.

• Scalable : SONA provides horizontal scalability of gateway nodes which plays a role of connecting point virtual networks to the outside of the world.

Limitations

• Only VXLAN type driver is supported

• Adding multiple subnets for a network is not supported yet

• Security group update is applied to a new VM only, not running VM

Project Members

More Information

• SONA Architecture
• SONA User Guide