Why does ethtool show 'no link' for ethernet interface even though cable is physically connected?
Issue
- The
ethtool
command showsLink detected: no
for interface - The
ip link
command showsUP
butNO CARRIER
- The
mii-tool
command showsSIOCGMIIPHY on 'ethX' failed
- The network link light is on but the interface will not come up
- The message
ADDRCONF(NETDEV_UP): ethX: link is not ready
appears in kernel messages
Environment
- Red Hat Enterprise Linux
- Ethernet network interface
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