10G ixgbe card is detected as 1G with intel NIC 10G X550

Solution Verified - Updated -

Issue

  • 10G ixgbe card is detected as 1G for Intel NIC 10G X550-T (twisted pair)
  • NIC speed reduced after kernel upgrade
  • Intel X550 10Gb NIC Auto-negotiation Link Speed Bug on RHEL 7.5 (ixgbe 5.1.0-k-rh7.5)

Environment

  • Red Hat Enterprise Linux 7.5 and later
    • kernel 3.10.0-862.el7 and later
  • Red Hat Enterprise Linux 8.0 and later
    • kernel 4.18.0-80.el8 and later
  • Intel Ethernet Controller X550 Series (AT/AT2/BT2) using ixgbe driver

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