D-Link DGS-3120-24TC Product Manual - Page 153

xStack® DGS-3120 Series Managed Switch Web UI Reference Guide Figure 6-9 DSCP Map Settings - DSCP DSCP window The fields that can be configured are described below: Parameter Description Unit Select the unit you want to configure. From Port / To Port Use the drop-down menu to select a range of port to configure. DSCP Map Use the drop-down menu to select one of two options: DSCP Priority - Specifies a list of DSCP values to be mapped to a specific priority. DSCP DSCP - Specifies a list of DSCP value to be mapped to a specific DSCP. DSCP List Enter a DSCP List value. Priority Use the drop-down menu to select a Priority value. This appears when selecting DSCP Priority in the DSCP Map drop-down menu. DSCP Enter a DSCP value. This appears when selecting DSCP Priority in the DSCP DSCP drop-down menu. Click the Apply button to accept the changes made. HOL Blocking Prevention HOL (Head of Line) Blocking happens when one of the destination ports of a broadcast or multicast packet are busy. The switch will hold this packet in the buffer while the other destination port will not transmit the packet even they are not busy. The HOL Blocking Prevention will ignore the busy port and forward the packet directly to have lower latency and better performance. On this page the user can enable or disable HOL Blocking Prevention. To view the following window, click QoS > HOL Blocking Prevention, as show below: Figure 6-10 HOL blocking Prevention window The fields that can be configured are described below: Parameter Description 145