3.27.12 QoS Weighted Random Early Detection Configuration

Use this command 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 ports in the switch.

Command Syntax:

qos wred queue <queue> min-fl <min_fl> max <max> [ fill-level ]
Table 3-119. Command Description

Argument

Description

Parameter

<queue>

The queue number (CoS) for which the following configuration applies. Specific queue or range from 0–7.

<min_fl>

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%.

Default

N.A

Mode

Global Configuration mode

Usage

Enable and configure Random Early Detection (RED) settings for a specific QoS queues. To disable, use the ‘no’ version of the command.

Example

Example 1:

Enable RED for queues 1, 2, 3 with lower fill level 20% and upper 40%.

(config)# qos wred queue 1-3 min-fl 20 max 40