D-Link DGS-3630-28SC [456/742] Wred drop counter

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 7-28 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.