https://docs.openstack.org/project-deploy-guide/openstack-ansible/pike/targethosts.html
https://docs.openstack.org/project-deploy-guide/openstack-ansible/pike/app-config-test.html#
http://uule.iteye.com/blog/2102484 CIDR
https://www.waitig.com/neutron%E6%80%BB%E7%BB%93-openvswitchvlan%E7%BD%91%E7%BB%9C.html Neutron总结-openvswitch+vlan网络 转自https://www.waitig.com/neutron%E6%80%BB%E7%BB%93-openvswitchvlan%E7%BD%91%E7%BB%9C.html