auto br-vlan
iface br-vlan inet manual
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    # Bridge port references untagged interface
    #bridge_ports bond0.1925
    pre-up ip link add br-vlan-veth type veth peer name eth12 || true
    # Set both ends UP
    pre-up ip link set br-vlan-veth up
    pre-up ip link set eth12 up
    # Delete veth pair on DOWN
    post-down ip link del br-vlan-veth || true
    bridge_ports bond0 br-vlan-veth