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Diagnosing "NO CARRIER" messages

The output from ifconfig is showing that eth0 has "NO CARRIER". Every physical link in an Ethernet network has a carrier signal present at all times, even if no data are flowing. For example, if you were to plug a network cable between an EAM and an Ethernet switch, there would be a carrier signal on that physical link - the cable - even if there were no other devices on the "network".

If an interface reports "NO CARRIER", it means that the interface is not connected to another functioning interface or that it is itself broken. There are several things to try: