Each row entry represents an interface on this virtual router
that participates in the MPLS protocol. A row cannot be created
or deleted via SNMP SET requests. A row with default attribute
values is created by setting the vRtrIfEntry attribute,
vRtrIfMplsStatus, to 'create'. A row is removed if
vRtrIfMplsStatus is set to 'delete'. However, an attempt to
destroy a row will fail if vRtrMplsIfAdminState has
not first been set to 'outOfService'.