Registering a machine with Red Hat Satellite 6 fails with error "Validation failed: Attached to can't be blank"

Solution Verified - Updated -

Issue

  • Registering a machine with Red Hat Satellite 6.6 whose primary interface is a bonded interface fails with the following error:

    # subscription-manager register --org="RedHat" --environment="Library"
    Registering to: satellite.example.com:443/rhsm
    Username:xxxxxxxx
    Password: 
    HTTP error (422 - Unknown): Validation failed: Attached to can't be blank
    
  • A similar problem has resurfaced in Red Hat Satellite 6.11 and later, as well.

Environment

  • Red Hat Satellite 6.6
  • Red Hat Satellite 6.11 and above

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