This read-create TruthValue enables Weighted Random Early Detection (WRED) as the congestion-avoidance algorithm for a QoS queue profile, and its description notes that when disabled, the associated WRED threshold parameters must not be specified. An administrator enables it to have the queue proactively drop or mark packets as it approaches congestion rather than only tail-dropping once full. For example, enabling WRED on a data queue profile lets the device start shedding lower-priority packets early during a traffic surge, protecting overall throughput before the buffer overflows.