MAC address pass through not working with Lenovo ThinkPad Thunderbolt 3 Dock Gen 2

Solution Verified - Updated -

Issue

  • Lenovo ThinkPad T490s BIOS has MAC address pass through enabled
  • Lenovo Lenovo ThinkPad Thunderbolt 3 Dock Gen 2 authorized in RHEL
  • Laptop connected via Thunderbolt cable to the docking station, but the docking station network interface does not have the MAC address of the laptop's internal network interface
  • What needs to be done to get the MAC address passed through to the docking station's network interface?

Environment

  • Red Hat Enterprise Linux (RHEL) 8
  • Lenovo ThinkPad Thunderbolt 3 Dock Gen 2

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