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).