Intel I219-LM Cards do not negotiate properly with Cisco 4500 switches

Solution In Progress - Updated -


  • Intel I219-LM [8086:15e3] cards do not negotiate properly with Cisco 4500 switches
    • For a given physical machine using an internal (i.e. motherboard) Intel I219-LM Ethernet card, connected to a Cisco 4500 switch, link auto-negotiation fails for a long time (hours or days) before finally connecting. Given the exact same physical machine, built-in network card and Cisco switch, the problem never happens on RHEL 7, but always happens on RHEL 8.


  • Red Hat Enterprise Linux (RHEL) 8
  • I219-LM Ethernet card connected to Cisco 4500 series switches
  • e1000e driver

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