This object sets the preference level, from 1 (low) to 10 (high), determining how likely the secondary line is to become the active line in the redundancy group, defaulting to 5 to match the primary. Admins adjust this relative to lgPrimaryWeight to control which line wins when both are healthy and eligible to be active. Leaving both weights at their default of 5 means whichever line first becomes active stays active until a fault occurs.