This object specifies the Per Class Overbooking
percentage for VBR-Nrt service category on this
interface. If the value of this object is 100,
Per Class Overbooking for VBR-Nrt is disabled on this
interface. Specifying a value that is greater than 100
causes the CAC to scale down the bandwidth allocated to
a VBR-Nrt VC on this interface by a factor that is equal
to the inverse of the overbooking percentage specified by
this object. A set request for this object will succeed
only if the value of the ifAdminStatus object for this
interface is 'down' and Interface overbooking
(rmIfOverBooking object) is disabled. A set request for
this object will not succeed if it specifies a value
that would cause the current bandwidth guarantees on
this interface to exceed the maximum bandwidth available
for guaranteed services on this interface.