Now that the appropriate OpenStack configuration files have been modified to use Open vSwitch as the networking driver, certain services must be started or restarted for the changes to take effect.

The Open vSwitch network agent should be restarted on compute02, compute03, and snat01:

# systemctl restart neutron-openvswitch-agent

The following services should be restarted on the controller node:

# systemctl restart neutron-server