Quality of Service (QoS): Managing Bandwidth More Effectively

Using QoS Classifiers To Configure QoS for Outbound Traffic

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 as indicated by No-override

the 64 codepoints do not assign an 802.1p priority, in table 6-11on page 6-59.

You can 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- override. Also deletes the codepoint policy name, if configured.

no qos dscp-map < codepoint > name

Deletes only the policy name, if configured, for < codepoint >.

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