-neutron subnet-create --name external-net --tenant-id \$(openstack project show service | grep id | awk '{ print \$4 }') --disable-dhcp external --gateway ${public_network_gateway} --allocation-pool start=${public_network_floating_ip_range%%,*},end=${public_network_floating_ip_range##*,} ${public_network_cidr}
+if [ "$external_network_ipv6" == "True" ]; then
+ neutron subnet-create --name external-net --tenant-id \$(openstack project show service | grep id | awk '{ print \$4 }') external --ip_version 6 --ipv6_ra_mode slaac --ipv6_address_mode slaac --gateway ${external_gateway} --allocation-pool start=${external_floating_ip_range%%,*},end=${external_floating_ip_range##*,} ${external_cidr}
+else
+ neutron subnet-create --name external-net --tenant-id \$(openstack project show service | grep id | awk '{ print \$4 }') --disable-dhcp external --gateway ${external_gateway} --allocation-pool start=${external_floating_ip_range%%,*},end=${external_floating_ip_range##*,} ${external_cidr}
+fi