The value of tMacFilterParamsOuterTagMask is applied as a mask to VID
of the outer VLAN tag of the packet prior to comparing it
with tMacFilterParamsOuterTagValue. The outer tag is the first tag in
the packet that is carried transparently through the service
(the first tag after the service delimiting tags).
This object can only be set if tMacFilterType is set to 'vid(3)'.