The value of iesGrpIfOperUpWhileEmpty specifies the
whether that operational status of the the IES group
interface, as indicated by iesIfOperStatus, should have
a value of 'up' even when there are no SAPs on the
group interface.
If the value of iesGrpIfOperUpWhileEmpty is 'true', the
value of iesIfOperStatus for the IES group interface will
be 'up' when there are no SAPs on the group interface. When
the value of iesGrpIfOperUpWhileEmpty is 'false', the value
of iesIfOperStatus will depend on the operational state of
the SAPs on the group interface. The value of
iesGrpIfOperUpWhileEmpty will be ignored when there are
SAPs on the IES group interface.