This object indicates the data link layer packet format that frames must have to match this L2 classifier entry. A value of 'untagged(1)' indicates that only frames received untagged will match this classifier component. A value of 'tagged(2)' means that only frames received tagged (both single tagged and double tagged) will be considered a match. A value of 'ignore(3)' means that the presence, or lack thereof, of a VLAN tag in the received packet will not be considered when determining whether a frame matches this classifier entry. A value of 'doubleTagged(4)' means that only frames received with an inner and outer tag (i.e., a double tagged frame) will be considered a match. Version 1/2 attribute.