This Object defines the VLAN on the VC. The value of 4097
is used if the object is not applicable, for example when
mapping all packets from an Ethernet port to this VC.
The value of 4096 is used to indicate untagged frames (at
least from the PW point of view), for example if
cpwVcEnetVlanMode is equal 'removeVLAN' or when
cpwVcEnetVlanMode equal 'noChange' and cpwVcEnetPortVlan
is equal 4096.