Numbering Mode of unit in XRN-Fabric. If the unit ID is assigned by the auto
numbering algorithm, the numbering mode will be automatic numbering; if the
unit ID (hh3cFtmUnitID) is assigned by the user, the numbering mode will be manual
numbering; if hh3cFtmUnitID is set to be zero, the numbering mode will become
automatic numbering.