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Ryu Network Operating System


Ryu Network Operating System

NOTE: Network Operating System is a terminology for a frame work for Software Defined Networking. It's not relevant to conventional Operating System like Linux kernel or distribution.


  • Name: yamahata
  • Email: yamahata at private dot email dot ne dot jp
  • Release notes owner:

Current status

Detailed Description

Ryu is an Operating System for Software Defined Networking.

Ryu aims to provide a logically centralized control and well defined API that make it easy for operators to create new network management and control applications. Currently, Ryu manages network devices by using OpenFlow. You can say that Ryu is an OpenFlow Controller.

For Software Defined Networking or OpenFlow, please refer to Open Networking Foundation

Benefit to Fedora

Now Fedora (Since Fedora 17) includes OpenStack and Open vSwitch. Ryu brings open source openflow controller which can cooperates well with OpenStack.


  • Proposal owners:
    • Ryu development: DONE
      • vlan support: 100% DONE
      • Ryu plugin support for Openstack Networking(Neutron, formaly Quantum): keeping update for its development
    • packaging:
      • rpm package: available at [1]
      • rpm package review [2] Work In Progress
      • make sure that it works with dependent Fedora package. Especially OpenStack and Open vSwitch
  • Other developers: N/A
  • Release engineering: N/A
  • Policies and guidelines: N/A

Upgrade/compatibility impact


How To Test

Typical usecase is with OpenStack.

User Experience

With openstack nova/quantum, users can build cloud system with multi tenant network support with open vswitch.


  • openstack nova
  • openstack neutron(formaly quantum)
  • openvswitch

Contingency Plan

  • Contingency mechanism: This feature can be removed entirely as contingency plan because no other package depends on this. OpenStack can work without Ryu.(With Ryu, it can provide better features.)
  • Contingency deadline: N/A
  • Blocks release? N/A


Release Notes

  • Ryu is added for building block as OpenFlow controller for Software Defined Networking. It provides L2-isolated network with OpenStack.