PLANET XGSW-28040 - Manual (Page 201)

User’s Manual of XGSW-28040
: Click to undo any changes made locally and revert to previously saved values.
4.9.14 WRED
This page allows you to configure the Random Early Detection (RED) settings for queue 0 to 5. RED cannot be applied to queue
6 and 7. Through different RED configuration for the queues (QoS classes) it is possible to obtain Weighted Random Early
Detection (WRED) operation between queues. The settings are global for all ports in the switch. The WRED screen in Figure
4-9-17 appears.
Figure 4-9-17 WRED page screenshot
The page includes the following fields:
Object Description
 Queue The queue number (QoS class) for which the configuration below applies.
 Enable Controls whether RED is enabled for this queue.
 Min. Threshold Controls the lower RED threshold. If the average queue filling level is below this
threshold, the drop probability is zero. This value is restricted to 0-100.
 Max. DP 1 Controls the drop probability for frames marked with Drop Precedence Level 1
when the average queue filling level is 100%. This value is restricted to 0-100.
 Max. DP2 Controls the drop probability for frames marked with Drop Precedence Level 2
when the average queue filling level is 100%. This value is restricted to 0-100.
 Max. DP3 Controls the drop probability for frames marked with Drop Precedence Level 3
when the average queue filling level is 100%. This value is restricted to 0-100.
RED Drop Probability Function
The following illustration shows the drop probability function with associated parameters.
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