Comment 9 for bug 1358554

I think I'm seeing the same thing on Juno without DVR. The router interface port has it's tag set to 4095:

    Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port "qr-c04a5455-c1"
            tag: 4095
            Interface "qr-c04a5455-c1"
                type: internal
        Port int-br-prv
            Interface int-br-prv
                type: patch
                options: {peer=phy-br-prv}

And the port shows up as follows on neutron:
neutron port-show c04a5455-c1b4-4bc5-ad5b-8b16d372c036
+-----------------------+--------------------------------------------------------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------------------------------------------------------+
| admin_state_up | True |
| allowed_address_pairs | |
| binding:host_id | node-6 |
| binding:profile | {} |
| binding:vif_details | {} |
| binding:vif_type | binding_failed |
| binding:vnic_type | normal |
| device_id | 602539d1-2cf9-4917-919d-4892976f6d10 |
| device_owner | network:router_interface |
| extra_dhcp_opts | |
| fixed_ips | {"subnet_id": "533e34e4-3474-469b-9e65-cd34498ec99e", "ip_address": "192.168.111.1"} |
| id | c04a5455-c1b4-4bc5-ad5b-8b16d372c036 |
| mac_address | fa:16:3e:f0:21:64 |
| name | |
| network_id | 4f2d6195-5487-4d85-ae8c-87085af201e3 |
| security_groups | |
| status | DOWN |
| tenant_id | 17ce62ae311f4c17b322fbced33178ca |
+-----------------------+--------------------------------------------------------------------------------------+