How does systemd Consistent Network Device Naming in RHEL7 judge whether the device is an on-board or not?

Solution Verified - Updated -

Issue

o<index>                        ----    on-board device index number
s<slot>[f<function>][d<dev_id>] ----    hotplug slot index number 
  • How does RHEL7 judge whether the device is an on-board or not?

Environment

  • Red Hat Enterprise Linux 7
  • systemd Consistent Network Device Naming
  • Network devices onboard or discrete cards

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