NOTES  VLAN  will use Broadcom's NICE interface when the network device
              supports it. This is necessary, since usually  the  hardware  of
              these  devices  already  removes  the vlan tag from the ethernet
              packet. The set_flag option on vlan-devices created  on  such  a
              physical  network  device  will  be  ignored.   Dumping the net-
              work-device will show only untagged(non-vlan) traffic, and dump-
              ing  the  vlan-devices  will only show traffic intended for that
              vlan, without the tags.