A set of the value enable(1) will cause
a port, as specified by ctVlanPortNum, to remain in the
egress list for the DEFAULT VLAN (VID 1) when the port's
VID, specified by ctVlanPortVID, is changed. A set of disable(2)
will cause the port to be removed from the egress list of the
DEFAULT VLAN when the ports VID is changed.