HI there! I want to create a public network. Following are the configurations in ML2

[ml2]
type_drivers = flat,vxlan
tenant_network_types = vxlan

[ml2_flat]
flat_networks = provider

[ovs]
local_ip = 192.168.57.6
bridge_mappings = provider:br-ex

which among the following commands is correct. can i use both commands to launch and what if it is shared?

  1.neutron net-create public --shared --provider:physical_network provider --provider:network_type flat 
  2.neutron net-create public --shared --provider:physical_network external --provider:network_type flat

Thanks in Advance.