This RowPointer indicates the entry in diffServMinRateTable
which indicates the priority or minimum output rate from this
scheduler. This attribute is used only when there is more than
one level of scheduler.
When it has the value zeroDotZero, it indicates that no minimum
rate or priority is imposed.
Setting this to point to a target that does not exist results in
an inconsistentValue error. If the row pointed to is removed or
becomes inactive by other means, the treatment is as if this
attribute contains a value of zeroDotZero.