Why does ethtool show 'no link' for ethernet interface even though cable is physically connected?
Issue
- The
ethtoolcommand showsLink detected: nofor interface - The
ip linkcommand showsUPbutNO CARRIER - The
mii-toolcommand 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 readyappears in kernel messages
Environment
- Red Hat Enterprise Linux
- Ethernet network interface
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
