hwQinQFlexibleFlag 1.3.6.1.4.1.2011.5.25.116.2.11.1.6

The service type of the sub interface, by setting hwQinQFlexibleFlag to the value (flexibleenable), the flexible attribute enabled; So if you set hwQinQSubIfType to be dot1q type, you can not specify hwQinQFlexibleFlag as flexibledisable.