HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

5-51
Quality of Service (QoS): Managing Bandwidth More Effectively
Differentiated Services Codepoint (DSCP) Mapping
Differentiated Services Codepoint
(DSCP) Mapping
A codepoint must have an 802.1p priority assignment (0 - 7) before you can
configure a policy for prioritizing packets. If a codepoint you want to use
shows No-override in the Priority column of the DSCP map (show qos dscp-map),
then you must assign a 0 - 7 priority before proceeding (qos dscp-map priority
command).
The DSCP Policy Table associates an 802.1p priority with a specific ToS byte
codepoint in an IPv4 packet. This enables you to set a LAN policy that operates
independently of 802.1Q VLAN-tagging.
In the default state, most of the 64 codepoints do not assign an 802.1p priority,
as indicated by No-override in table 5-9.
You can use the following command to list the current DSCP Policy table.
Table 5-9. The Default DSCP Policy Table
Syntax: show qos dscp-map
Displays the DSCP Policy Table.
DSCP Policy 802.1p Tag Policy Name DSCP Policy 802.1p Tag Policy Name
0 No-override 32 No-override
1 No-override 33 No-override
2 No-override af41 No-override
3 No-override 35 No-override
4 No-override af42 No-override
5 No-override 37 No-override
6 No-override af43 No-override
7 No-override 39 No-override
8 No-override 40 No-override
9 No-override 41 No-override
af11 No-override 42 No-override
11 No-override 43 No-override