When written with a (1), will fragment IP frames from FDDI to
Ethernet before the frame is processed by the ATM SAR
component. This object must be ignored when written with a (1) if the
ctTransFddiAtmMtu object is written with a (1).
When written with a (2), discards any frames received on the FNB
which are greater than 1518 bytes in length. A value of
(2) for this object must be ignored if the ctTransFddiAtmMtu
object is written with a (1).