This problem may indicate that the attached hardware (MFD/switch) is powered down or malfunctioning. If there are no problems with the hardware, one or both of the Ethernet Link Mode properties may need to be changed. To change these properties:
Enter a new value for the Eth0 Link Mode/Eth1 Link Mode property. Possible values are:
Start at 100Mbit full duplex and proceed downwards until you see the yellow status LED light up.