CHAPTER 18 The Network

18.4 Trouble shooting the Ethernet

• le0 no carrier - transceiver cable problem?
  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.

• le0 ethernet jammed
  Make sure that the ethernet cable is terminated at both ends.

• unknown host
  The remote hostname can't be resolved into an IP address. Try using the IP address. If this works you need to check your name resolution.

• network unreachable
  Your machine doesn't have a route to the remote host. Use "netstat -rn" to check the routing tables and set a default route if necessary.

• no answer or Connection timed out or cannot connect
  Your machine has a route to the remote host, but is not receiving any response from it. The network may be down, or the remote host may not have a route back to your machine, or one or both machines may be misconfigured. Check your network configuration with ifconfig.

18.4.1 - etherfind

18.4.2 - snoop

18.4.3 - IRIX 5.X

18.4.4 - Digital UNIX