"Ryu is an open-sourced network operating system licensed under Apache License v2. The project URL is http://www.osrg.net/ryu/ . Ryu aims to provide logically centralized control and well defined API that makes it easy for cloud operators to implement network management applications on top of the Ryu. Currently, Ryu supports OpenFlow protocol to control the network devices. Ryu plugin for OpenStack was merged into Quantum Essex. You can create tens of thousands of isolated virtual networks without using VLAN. The project goal is to develop an OSS network operating system that has high quality enough for use in large production environment in code qualify/functionality/usability.This talk is intended for cloud operators and developers. Audience members will learn Ryu desgin and how to manage network with Ryu. We expect that the audience is familiar with network."