This attribute records the number of times that the bus tap has
detected a cell with invalid parity on the bus. Each occurrence may
result in the loss of one or more cells or frames. This type of event
may occur during normal operation of the module, for example
when a card is inserted, removed, or reboots; it may also be caused
by a hardware fault.
The attribute's value wraps around to zero when it exceeds the
maximum permitted value.