D-Link DMS-3130 User Manual - Page 303

DMS-3130 Series Multi-Gigabit L3 Stackable Managed Switch Web UI Reference Guide Figure 7-20 WRED Profile Window The fields that can be configured are described below: Parameter Profile Packet Colour 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. Min Threshold Max Threshold Max Drop Rate 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. 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 to the default values 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. 292