This object sets the forwarding database utilization percentage, for this VPLS instance, at which the device sends a vplsFwdFullAlarmCleared notification confirming the table has dropped back to a safe level. Admins tune this threshold, which defaults to 90%, to control how much the utilization must fall before the alarm-cleared condition is reported, avoiding rapid alarm flapping near the high watermark. For example, a gap between the 95% high watermark and a 90% low watermark prevents the alarm from toggling on and off repeatedly as utilization hovers near the threshold.