Hi QianJiang: The default datanetwork in guide is vlan, you should change it to flat before openstack network create. system datanetwork-add ${PHYSNET0} flat Thanks. BR Austin Sun. From: 钱江 <qianjiang@baicells.com> Sent: Thursday, October 31, 2019 2:42 PM To: starlingx-discuss <starlingx-discuss@lists.starlingx.io> Subject: [Starlingx-discuss] openstack network creation failure: Flat provider networks are disabled Hi, the community After installation of "Virtual All-in-one Simplex Installation R2.0<https://docs.starlingx.io/deploy_install_guides/r2_release/virtual/aio_simplex.html>", everything goes well except, controller-0:~$ openstack network create --share --external --provider-physical-network provider --provider-network-type flat provider Error while executing command: BadRequestException: 400, Invalid input for operation: Flat provider networks are disabled. Could anyone help to point out what's the issue, and how to fix it? Best Regard