HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 191
QoS UDP/TCP Priority, Example of the Show QoS Output for VLAN Priority
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Note Quality of Service (QoS): Managing Bandwidth More Effectively Using QoS Classifiers To Configure Quality of Service for Outbound Traffic ■ IP packets received through a VLAN-tagged port are managed using the 802.1p priority they carry in the 802.1Q field in their headers. ■ VLAN-tagged packets received through an untagged port are handled by the switch with "normal" priority. For example, Figure 5-3 below shows the QoS configurations on the switch that are configured with the VLAN ID classifier. Note that non-default 802.1p priorities have been configured for VLAN IDs 22 and 33; packets received on VLAN 1 are managed with the default settings, as described in the two bulleted items above. This output shows that VLAN 1 is in the default state, while VLANs 22 and 33 have been configured for 802.1p and DSCP Policy priorities respectively. Figure 5-3. Example of the Show QoS Output for VLAN Priority QoS UDP/TCP Priority QoS Classifier Precedence: 1 When you use UDP or TCP and a layer 4 Application port number as a QoS classifier, traffic carrying the specified UDP/TCP port number(s) is marked with the UDP/TCP classifier's configured priority level, without regard for any other QoS classifiers in the switch. UDP/TCP QoS applications are supported only for IPv4 packets only. For more information on packet-type restrictions, refer to ''Details of Packet Criteria and Restrictions for QoS Support'' on page 5-72. Options for Assigning Priority. Priority control options for TCP or UDP packets carrying a specified TCP or UDP port number include: ■ 802.1p priority ■ DSCP policy (Assigning a new DSCP and an associated 802.1p priority; inbound packets must be IPv4.) 5-15