When written with a (1), allows SNAP frames up to 4500 bytes in
length to be received from the FNB and processed by the ATM SAR
component. When this object is written with a (1), a value
of (1) for the ctTransFddiAtmIPFrag object must be ignored.
When written with a (2), discards any frames received on the FNB
which are greater than 1518 bytes in length. A
value of (2) must be ignored if the frame is IP and the
ctTransFddiAtmIPFrag object is written with a (1).