DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
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WRED Queue
This window is used to display and configure the WRED queue settings. WRED drops packets, based on the average
queue size exceeding a specific threshold, to indicate congestion. Explicit Congestion Notification (ECN) is an
extension to WRED in that ECN marks packets instead of dropping them when the average queue size exceeds a
specific threshold value. When configuring the WRED ECN feature, routers and end hosts would use this marking as
a signal that the network is congested and slow down sending packets.
To view the following window, click QoS > WRED > WRED Queue, as shown below:
Figure 7-27 WRED Queue Window
The fields that can be configured are described below:
Parameter Description
Unit
Select the Switch unit ID that will be used here.
From Port - To Port
Select the Switch port range that will be used here.
CoS
Select the CoS value here. The range is from 0 to 7.
WRED State
Select to enable or disable the WRED feature state on the specified port(s) here.
Profile
Enter the WRED profile ID here. The range is from 1 to 128.
Weight
Enter the exponential weight value here. The range is from 0 to 15. This feature is
used to configure the WRED exponential weight factor for the average queue size
calculation for the queue.
ECN State
Select to enable or disable the ECN feature on the specified port(s) here.
Click the Apply button to accept the changes made.
WRED Drop Counter
This window is used to view and clear the WRED drop counter information.
To view the following window, click QoS > WRED > WRED Drop Counter, as shown below:
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