Install the Open vSwitch (OVS) plug-in on a dedicated compute node

Install the Open vSwitch plug-in and its dependencies:

# apt-get install neutron-plugin-openvswitch-agent openvswitch-datapath-dkms

Restart Open vSwitch:

# service openvswitch-switch restart

You must set some common configuration options no matter which networking technology you choose to use with Open vSwitch. You must add the br-int integration bridge, which connects to the VMs.

# ovs-vsctl add-br br-int

You must set some common configuration options. You must configure Networking core to use OVS. Edit the /etc/neutron/neutron.conf file:

core_plugin = neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2

Configure the networking type that you chose when you set up the network node: either GRE tunneling or VLANs.

You must configure a firewall as well. You should use the same firewall plug-in that you chose to use when you set up the network node. To do this, edit /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini file and set the firewall_driver value under the securitygroup to the same value used on the network node. For instance, if you chose to use the Hybrid OVS-IPTables plug-in, your configuration looks like this:

[securitygroup]
# Firewall driver for realizing neutron security group function.
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

	Warning
	You must use at least the No-Op firewall. Otherwise, Horizon and other OpenStack services cannot get and set required VM boot options.

Now, return to the general OVS instructions.