Setting this variable to 'create' causes this interface to be
used with MPLS. It also causes a row to be created in the
vRtrMplsIfTable. Setting it to 'delete' removes the interface
from MPLS and causes the corresponding row in the vRtrMplsIfTable
to be removed. However, an attempt to set vRtrIfMplsStatus to
'delete' will fail if MPLS activity on this interface is not
administratively in the outOfService state, i.e. vRtrMplsIfAdminState
of the vRtrMplsIfTable must be set to 'outOfService'.