HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 185

Quality of Service (QoS): Managing Bandwidth More Effectively Introduction and applications (shown in table 5-3). In either case, an IP packet can also carry a priority policy to downstream devices by using DSCP-marking in the ToS byte. Table 5-3. Mapping Switch QoS Priority Settings to Device Queues Priority Setting 1 2 0 3 4 5 6 7 Outbound Port Queues in the Switch Queue 1 Queue 2 Queue 3 Queue 4 Queue 5 Queue 6 Queue 7 Queue 8 802.1p Priority Setting Added Queue Assignment in Downstream Devices With: to Tagged VLAN Packets Leaving the Switch 8 Queues 3 Queues 2 Queues 1 (low priority) Queue 1 Queue 1 2 Queue 2 Queue 1 0 (normal priority) Queue 3 Queue 2 3 Queue 4 4 (medium priority) Queue 5 Queue 3 5 Queue 6 Queue 2 6 (high priority) Queue 7 Queue 4 7 Queue 8 The QoS queue configuration feature can change the number of outbound port queues in the switch from four (the default) to two queues. Note on CEE Environments If you are running in a CEE environment, it is highly recommended that you do NOT change the existing priority mappings. Re-mapping the existing priorities can severely impact performance. 5-9