This attribute counts valid cells received from the ATM interface.
This count includes cells which may be subsequently discarded.
The counter is reset to zero when the component is activated, or
when any critical attribute of the component is changed. On ATM
IP FPs valid cells include cells that arrive on a VCC whose
VPI.VCI cannot be identified. These cells are also counted under
the droppedRxCell attribute. The value of this attribute on ATM IP
FPs should be greater than or equal to the sum of droppedRxCell
and all the VCC and VPC rxCell attributes under this interface. The
counter wraps to zero when it exceeds its maximum value of
(2**64)-1.