This selects the next Differentiated Services Scheduler. The
RowPointer must point to a diffServSchedulerEntry.
A value of zeroDotZero in this attribute indicates an incomplete
diffServQEntry instance. In such a case, the entry has no
operational effect, since it has no parameters to give it
meaning.
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.