6.4.7 Copy all Frames (Promiscuous Mode)

If the Copy All Frames (CAF) bit is set in the Network Configuration register then all frames (except those that are too long, too short, have FCS errors, or have RXER asserted by the PHY during reception) will be copied to memory. Frames with FCS errors will be copied if the Ignore RX FCS (IRXFCS) bit is set in the Network Configuration register.