4.27.12 QoS Weighted Random Early Detection (WRED) Configuration

The Weighted Random Early Detection Configuration page allows you to configure the Random Early Detection (RED) settings. Through different RED configuration for the queues, it is possible to obtain WRED operation between queues. The settings are global for all ports in the switch.

Figure 4-108. Weighted Random Early Detection Configuration

The Weighted Random Early Detection Configuration page has the following parameters:

  • Queue: The queue number (CoS) for which the configuration below applies
  • Enable: Controls if RED is enabled for this entry
  • Min: Controls the lower RED fill level threshold. If the queue filling level is below this threshold, the drop probability is zero. This value is restricted to 0%–100%.
  • Max: Controls the upper RED drop probability or fill level threshold for frames marked with Drop Precedence Level > 0 (yellow frames). This value is restricted to 1%–100%.
  • Max Unit: Selects the unit for maximum possible values
    • Drop Probability: Maximum controls the drop probability just below 100% fill level
    • Fill Level: Maximum controls the fill level where drop probability reaches 100%