IR31849 for SNACOM and OFFLOAD on the 3172 March 14, 1996 Description of the problem - Fddi hang may occur. No data will be able to be received via the fddi. Only recovery is Re-IPL of the 3172. The fix - IR31849 reapplies IBMFDDI.OS2 (the driver) and IBMFDDI.BIN (the microcode).