Hi, the community

After installation of "Virtual All-in-one Simplex Installation R2.0", 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