Wred Port Settings - D-Link xStack DGS-3620 Series Reference Manual

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
1. Every QoS queue has a minimum and a maximum level for acceptance of packets. Once the maximum
threshold has been reached for this queue, the Switch will begin discarding all ingress packets, this
minimizing the allotted bandwidth for QoS. When below the minimum threshold, the switch will accept all
ingress packets.
2. When the ingress packets are somewhere between the maximum and minimum queue, the Switch will use
a slope probability function to determine a random method of dropping packets based on the maximum
drop rate which specifies the drop probability when the queues reach maximum threshold. If queues are
closer to the maximum threshold, the Switch will increase the discarding of random packets to even out the
flow to the queues and avoid overflows to higher priority queues.

WRED Port Settings

This window is used to configure the WRED state and its port settings.
To view the following window, click QoS > WRED > WRED Port Settings, as show below:
The fields that can be configured are described below:
Parameter
WRED State
Unit
From Port / To Port
Class ID
Figure 7-10 WRED Settings window
Description
Click to enable or disable the WRED global state.
Select the unit you want to configure.
Use the drop-down menu to select the port range to use for this configuration.
Use the drop-down menu to select the hardware priority.
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