TS-4100 Ethernet
From embeddedTS Manuals
This board includes two ethernet ports using the dual onboard CPU controllers and external Micrel PHYs. The MAC address is assigned from the Technologics pool using 00:d0:69:00:00:00, and the two MAC addresses will always be sequential. These MAC addresses are burned into the CPU's fuses during production.
U-boot supports only the ethernet port on CN1_01-11 odd. Once booted to Linux, this is eth1, and CN2_16-24 even provide eth0.