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Quality of Service (QoS): Managing Bandwidth More Effectively
Differentiated Services Codepoint (DSCP) Mapping
Differentiated Services Codepoint
(DSCP) Mapping
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 on page 5-34.
You can use the following command to list the current DSCP Policy table,
change the codepoint priority assignments, and assign optional names to the
codepoints.
Syntax: show qos dscp-map
Displays the DSCP Policy Table.
qos dscp-map < codepoint > priority < 0 - 7 > [name < ascii-string >]
Configures an 802.1p priority for the specified codepoint
and, optionally, an identifying (policy) name.
no qos dscp-map < codepoint >
Reconfigures the 802.1p priority for <codepoint> to No-over-
ride. Also deletes the codepoint policy name, if configured.
no qos dscp-map < codepoint > name
Deletes only the policy name, if configured, for < codepoint >.