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Physnet VLAN: More than one external network exists


we are using physnet (br-ex) for external connections to OpenStack. All networks should use a VLAN-ID so we can plug in devices by using PVID on most switches.

I created several networks on our infrastructure like this:

neutron net-create wan-01 --provider:network_type vlan --provider:physical_network physnet --router:external --shared
neutron net-create wan-02 --provider:network_type vlan --provider:physical_network physnet --router:external --shared

What does external realy mean? We have multiple external subnets (pseudo physical by VLAN), so we need the L3-Agent to host multiple networks.

Currently the logs are flooded by "More than one external network exists.". What is the right approach?

Thank you.