HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

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Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Classifiers To Configure Quality of Service for Outbound Traffic
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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 pack-
ets. 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
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 DSCP 15 7
10.28.31.130 DSCP 16 5
10.28.31.100 DSCP 17 1
10.28.31.101 DSCP 17 1