HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 224

Quality of Service (QoS): Managing Bandwidth More Effectively Using QoS Classifiers To Configure Quality of Service for Outbound Traffic ProCurve(config)# no interface 1 qos ProCurve(config)# show qos port-priority Port priorities In this instance, No-override indicates that port 1 is not prioritized by QoS. Port Apply rule | DSCP Priority Radius Override 1 Priority | No-override No-override 2 Priority | 6 No-override 3 Priority | 6 No-override 4 Priority | 5 No-override Figure 5-21. Returning a QoS-Prioritized VLAN to "No-override" Status Assigning a DSCP Policy Based on the Source-Port This option assigns a previously configured DSCP policy (codepoint and 802.1p priority) to outbound IP packets (received from the specified sourceports). That is, the switch: 1. Selects an incoming IP packet on the basis of its source-port on the switch. 2. Overwrites the packet's DSCP with the DSCP configured in the switch for such packets. 3. Assigns the 802.1p priority configured in the switch for the new DSCP. (See "Differentiated Services Codepoint (DSCP) Mapping" on page 5-51 for more information.) 4. Forwards the packet through the appropriate outbound port queue. Steps for Creating a Policy Based on Source-Port Classifiers. Note You can select one DSCP per source-port. Also, configuring a new DSCP for a source-port automatically overwrites (replaces) any previous DSCP or 802.1p priority configuration for that port.) 1. Identify the source-port classifier to which you want to assign a DSCP policy. 2. Determine the DSCP policy for packets having the selected source-port: a. Determine the DSCP you want to assign to the selected packets. (This codepoint will be used to overwrite the DSCP carried in packets received through the source-port from upstream devices.) b. Determine the 802.1p priority you want to assign to the DSCP. 5-48