# neutron router-create core-router
# neutron net-create private-net --shared
# neutron subnet-create private-net 10.0.0.0/24 --name private-subnet
# neutron router-interface-add core-router private-subnet
# neutron net-create external-net --router:external --provider:physical_network flat --provider:network_type flat
# neutron subnet-create --name external-subnet --allocation-pool start=10.10.47.60,end=10.10.47.80 --disable-dhcp --gateway 10.10.47.1 external-net 10.10.47.0/24
# neutron router-gateway-set core-router external-net