The
stge device driver supports the Sundance/Tamarack TC9021 Gigabit Ethernet chip.
The Sundance/Tamarack TC9021 is found on the D-Link DGE-550T, and the Antares Microsystems Gigabit Ethernet board. It uses an external PHY or an external 10-bit interface.
The TC9021 supports IPv4/TCP/UDP checksumming in hardware. The
stge driver supports this feature of the chip. See
ifconfig(8) for information on how to enable this feature.