Suddenly lost network connection on NIC with nx_nic driver while physical links were fine on Red Hat Enterprise Linux

Solution Verified - Updated -

Issue

  • RHEL 5.5 production server lost network connection. After checking physical links/cables, we found that everything was fine. Indicators on NIC, switch were fine, but no link was detected in "ethtool" command. Re-setting interface didn't help, then rebooting the server brought connection back.

Environment

  • Red Hat Enterprise Linux 5.5

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