le0: No carrier-- cable disconnected or hub link test disabled?

Cause

Standalone machines with no Ethernet port connection get this error when the system tries to access the network. If the Ethernet cable is disconnected, SPARC machines with the sun4m architecture usually display this message, whereas machines with the sun4c architecture usually display the "le0: No carrier-- transceiver cable problem" message instead. If the Ethernet cable is connected, this message could result from a mismatch between the machine's NVRAM settings and the Ethernet hub settings.

Action

If this message is continuous, try to save any work to local disk.

When a machine is configured as a networked system, it must be plugged into the Ethernet with a twisted pair J45 connector.

If the Ethernet cable is plugged in, find out whether or not the Ethernet hub does a Link Integrity Test. Then become superuser to check and possibly set the machine's NVRAM. If the hub's Link Integrity Test is disabled, set this variable to false.

# eeprom | grep tpe
tpe-link-test?=true
# eeprom 'tpe-link-test?=false'