I'm getting a error

le0: No Carrier - transceiver cable problem?


Tried looking around to see what is the best way to fix this error. Can anyone help me I can't find anything.

When a machine is configured as a networked system, it must be plugged into the Ethernet with either a twisted pair J45 connector or thicknet 10Base-T connector (depending on the building's Ethernet cable type).

Check the transceiver cable to make sure that you are properly connected to the network. Sun, especially on it's older boxes, is notorious for having bad connections here; try a different transceiver box. It could also be another hardware problem on the network, such as a damaged cable, or a faulty bridge or router.

and some times cable is well , connected also , but hub or switch is not powered on!!!.
this happened to me also , this thing stuck me when i realized no leds were glowing.
raju