The PRO/1000 PF Dual Port Server Adapter ignores the content of the 2-octet length field in the Ethernet frame. Its successor, the Ethernet Server Adapter I350-F2, however, does care about it. If the actual packet length exceeds it, the card seems to simply drop the packet (the packet doesn't make it to the driver).
Is it possible to make the i350 ignore this field just as the old PRO/1000 did? I'd like it not to drop the suspicious packets.