HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 202

Quality of Service (QoS): Managing Bandwidth More Effectively Using QoS Classifiers To Configure Quality of Service for Outbound Traffic . ProCurve(config)# qos device-priority 10.28.31.1 dscp 15 ProCurve(config)# qos device-priority 10.28.31.130 dscp 16 ProCurve(config)# qos device-priority 10.28.31.100 dscp 17 ProCurve(config)# qos device-priority 10.28.31.101 dscp 17 ProCurve(config)# show qos device-priority Device priorities Device Address Apply rule | DSCP Priority 10.28.31.1 10.28.31.130 10.28.31.100 10.28.31.101 DSCP DSCP DSCP DSCP 15 7 16 5 17 1 17 1 Figure 5-8. The Completed Device-Priority/Codepoint Configuration The switch will now apply the DSCP policies in figure 5-8 to IPv4 packets received on the switch with the specified IP addresses (source or destination). This means the switch will: ■ Overwrite the original DSCPs in the selected packets with the new DSCPs specified in the above policies. ■ Assign the 802.1p priorities in the above policies to the appropriate packets. QoS IP Type-of-Service (ToS) Policy and Priority QoS Classifier Precedence: 3 You can assign a maximum of 64 ToS rules. This feature applies only to IPv4 traffic and performs either of the following: ■ ToS IP-Precedence Mode: All IP packets generated by upstream devices and applications include precedence bits in the ToS byte. Using this mode, the switch uses these bits to compute and assign the corresponding 802.1p priority. ■ ToS Differentiated Services (Diffserv) Mode: This mode requires knowledge of the codepoints set in IP packets by the upstream devices and applications. It uses the ToS codepoint in IP packets coming from upstream devices and applications to assign 802.1p priorities to the packets. You can use this option to do both of the following: • Assign a New Prioritization Policy: A "policy" includes both a codepoint and a corresponding 802.1p priority. This option selects an incoming IPv4 packet on the basis of its codepoint and assigns a new 5-26