OVN provides virtual networking for Open vSwitch and is a component of the Open vSwitch project. This project provides integration between OpenStack Neutron and OVN.

• Free software: Apache license
• Source: http://git.openstack.org/cgit/openstack/networking-ovn
• Bugs: http://bugs.launchpad.net/networking-ovn
• Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
• IRC: #openstack-neutron-ovn on Freenode.
• Docs: http://docs.openstack.org/developer/networking-ovn/

The original OVN project announcement can be found here:

• http://networkheresy.com/2015/01/13/ovn-bringing-native-virtual-networking-to-ovs/

The OVN architecture is described here:

• http://openvswitch.org/support/dist-docs/ovn-architecture.7.html

Here are two tutorials that help with learning different aspects of OVN:

• http://blog.spinhirne.com/p/blog-series.html#introToOVN
• http://docs.openvswitch.org/en/latest/tutorials/ovn-basics/

OVN DB schemas and other man pages:

• http://openvswitch.org/support/dist-docs/ovn-nb.5.html
• http://openvswitch.org/support/dist-docs/ovn-sb.5.html
• http://openvswitch.org/support/dist-docs/ovn-nbctl.8.html
• http://openvswitch.org/support/dist-docs/ovn-sbctl.8.html
• http://openvswitch.org/support/dist-docs/ovn-northd.8.html
• http://openvswitch.org/support/dist-docs/ovn-controller.8.html
• http://openvswitch.org/support/dist-docs/ovn-controller-vtep.8.html

The openvswitch web page includes a list of presentations, some of which are about OVN:

• http://openvswitch.org/support/

• OVN talk at OpenStack Summit in Barcelona, Fall 2016

  • https://www.youtube.com/watch?v=q3cJ6ezPnCU

• OVN talk at OpenStack Summit in Austin, Spring 2016
  • https://www.youtube.com/watch?v=okralc7LrZo
• OVN Project Update at the OpenStack Summit in Tokyo, Fall 2015
  • http://openvswitch.org/support/slides/OVN_Tokyo.pdf
  • https://www.youtube.com/watch?v=3IrG2xghJjs
• OVN at OpenStack Summit in Vancouver, Sping 2015
  • http://openvswitch.org/support/slides/OVN-Vancouver.pdf
  • https://www.youtube.com/watch?v=kEzXTq2fPDg
• OVS Conference 2015
  • https://www.youtube.com/watch?v=JLGZOYi_Cqc

These blog resources may also help with testing and understanding OVN:

• http://networkop.co.uk/blog/2016/11/27/ovn-part1/
• http://networkop.co.uk/blog/2016/12/10/ovn-part2/
• https://blog.russellbryant.net/2016/12/19/comparing-openstack-neutron-ml2ovs-and-ovn-control-plane/
• https://blog.russellbryant.net/2016/11/11/ovn-logical-flows-and-ovn-trace/
• https://blog.russellbryant.net/2016/09/29/ovs-2-6-and-the-first-release-of-ovn/
• http://galsagie.github.io/2015/11/23/ovn-l3-deepdive/
• http://blog.russellbryant.net/2015/10/22/openstack-security-groups-using-ovn-acls/
• http://galsagie.github.io/sdn/openstack/ovs/2015/05/30/ovn-deep-dive/
• http://blog.russellbryant.net/2015/05/14/an-ez-bake-ovn-for-openstack/
• http://galsagie.github.io/sdn/openstack/ovs/2015/04/26/ovn-containers/
• http://blog.russellbryant.net/2015/04/21/ovn-and-openstack-status-2015-04-21/
• http://blog.russellbryant.net/2015/04/08/ovn-and-openstack-integration-development-update/