TS-4100 Ethernet
From embeddedTS Manuals
This device includes two ethernet ports using the dual in-CPU MACs and external PHYs. The MAC address is assigned from the Technologic System's OUI of 00:D0:69:xx:xx:xx, and the two MAC addresses assigned 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 numbered pins). Once booted to Linux, this is eth1, and CN2_16-24 (even numbered pins) provide eth0.