Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 143
WRED
This page allows you to configure the Random Early Detection (RED) settings. Through different RED
configuration for the queues, it is possible to obtain Weighted Random Early Detection (WRED) operation
between queues. The settings are global for all switch ports.
WRED (Weighted Random Early Detection) is an active queue management mechanism that provides
preferential treatment of higher priority frames when traffic builds up within a queue. A frame's DPL is used as
input to WRED. A higher DPL assigned to a frame results in a higher probability that the frame is dropped during
times of congestion.
Group: The WRED group number for which the configuration below applies.
Queue: The queue number (CoS) for which the configuration below applies.
DPL: The Drop Precedence Level for which the configuration below applies.
Enable: Check the box for the RED to be 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 Max. Possible values are:
Drop Probability: Max controls the drop probability just below 100% fill level (default).
Fill Level: Max controls the fill level where drop probability reaches 100% (see below).
Buttons
Apply: Click to save changes.
Reset: Click to undo any changes made locally and revert to previously saved values.
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