6-14
Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Types To Configure QoS for Outbound Traffic
Using QoS Types To Configure QoS for
Outbound Traffic
Note In addition to the information in this section on the various QoS types, refer
to “QoS Operating Notes and Restrictions” on page 6-37.
Viewing the QoS Configuration
Examples of the show qos output are included with the example for each
priority type.
QoS Feature Default Menu CLI Web
IP Type-of-Service Priority Disabled — page 6-16 “
Interface (Source-Port)
Priority
Disabled — page 6-29 “
Syntax: show qos < priority-type >
dscp-map
Display the mappings between a DSCP (Differentiated-
Services Codepoint) value and associated 802.1p
priority. The mapping is used to asign priority for
IPv4 packets if a QoS classifier uses this DSCP policy
as the method of traffic prioritization.
For configuration, the qos dscp-map command is
optional if a priority has already been assigned to the
< codepoint >. The command creates a DSCP policy by
assigning an 802.1p priority to a specific DSCP. When
the switch applies this policy to a packet, the priority
determines the packet’s queue in the outbound port to
which it is sent. If the packet leaves the switch on a
tagged port, it carries the 802.1p priority with it to the
next downstream device. For IPv4 packets, the DSCP
will be replaced by the codepoint specified in this
command. (Default: No-override
for most codepoints.
See table 6-10 on page 6-33.)
