tLagPortThreshold is a threshold for tLagPortThresholdAction. When a physical port link state changes and the number of operational physical ports is less than or equal to tLagPortThreshold, tLagPortThresholdAction is invoked: either the LAG is set operationally down, or the protocols operating on the LAG interface are adjusted. When the number of operational physical ports becomes greater than tLagPortThreshold, tLagPortThresholdAction is revoked: either the LAG is set operationally up, or the protocols operating on the LAG interface are adjusted. The value zero means tLagPortThresholdAction is never invoked. To invoke dynamicCost at every physical port state change, set tLagPortThreshold to the total number of physical ports configured to be in the Link Aggregation Group. The value of this object can be overruled with a nonzero value of the object tLagWeightThreshold.