indicates that this interface should use GVRP to register itself with its switch
indicates that this interface's operating state is tied to the underlying network interface but other details (like routing) are not.
indicates that this interface should use MVRP to register itself with its switch
indicates that this interface should reorder outgoing packet headers to look more like a non-VLAN Ethernet interface
NM.VlanFlags values control the behavior of the VLAN interface.