Wred Queue - D-Link DGS-3130 Series Web Ui Reference Manual

DGS-3130 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
Parameter
Profile
Packet Colour
Min Threshold
Max Threshold
Max Drop Rate
Click the Apply button to accept the changes made.
Click the Find button to locate a specific entry based on the information entered.
Click the Reset Configuration button to reset the configuration on the specified entry.

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:
The fields that can be configured are described below:
Parameter
Unit
From Port - To Port
CoS
Description
Enter the WRED profile ID here. The range is from 1 to 128.
Select the packet color here. Options to choose from are Green, Yellow, and
Red.
Green - Specifies the WRED drop parameters for green packets to be set.
Yellow - Specifies the WRED drop parameters for yellow packets to be set.
Red - Specifies the WRED drop parameters for red packets to be set.
Enter the minimum threshold value here that will be used to start WRED
dropping. The range is from 0 to 100.
Enter the maximum threshold value here over which WRED will drop all
packets destined for this queue. The range is from 0 to 100.
Enter the maximum drop-rate value here. The range is from 0 to 14. This
feature specifies the drop probability when the average queue size reaches the
maximum threshold. When this value is zero, then the packet will not be
dropped or remarked for ECN.
Figure 7-21 WRED Queue Window
Description
Select the Switch unit ID that will be used here.
Select the Switch port range that will be used here.
Select the CoS value here. The range is from 0 to 7.
267