This object define the VLAN value on the physical port (or
VPLS virtual port) if a change is required to the VLAN value
between the VC and the physical/virtual port.
The value of this object can be ignored if the whole traffic
from the port is forwarded to one VC independent of the
tagging on the port, but it is RECOMENDED that the value in
this case will be '4097' indicating not relevant.
It MUST be equal to cpwVcEnetPwVlan if 'noChange' mode
is used.
The value 4096 indicate that no VLAN (i.e. untagged
frames) on the port are associated to this VC. This
allows the same behaviors as assigning 'Default VLAN'
to un-tagged frames.