Comment 1 for bug 1980208

To reproduce:

openstack network create vlan_data --provider-physical-network tenantvlan --provider-network-type vlan --provider-segment 101 --share
openstack subnet create vlan_data_subnet --dhcp --network vlan_data --subnet-range 11.11.11.0/24 --allocation-pool start=11.11.11.100,end=11.11.11.200
openstack port create direct_vlan1 --vnic-type=direct --network vlan_data --binding-profile '{"capabilities":["switchdev"]}' --security-group my_policy

openstack network create vlan_data2 --provider-physical-network tenantvlan --provider-network-type vlan --provider-segment 102 --share
openstack subnet create vlan_data2_subnet --dhcp --network vlan_data2 --subnet-range 22.22.22.0/24 --allocation-pool start=22.22.22.100,end=22.22.22.200
openstack port create direct_vlan2 --vnic-type=direct --network vlan_data2 --binding-profile '{"capabilities":["switchdev"]}' --security-group my_policy

openstack router create vlan_router
openstack router add subnet vlan_router vlan_data_subnet
openstack router add subnet vlan_router vlan_data2_subnet

openstack server create --key-name bastion --flavor d1.demo --image perf --port direct_vlan1 vm1 --availability-zone nova:node3.maas
openstack server create --key-name bastion --flavor d1.demo --image perf --port direct_vlan2 vm2 --availability-zone nova:node4.maas