Command Reference Guide

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Quality of Service configuration
Use the Quality of Service (QoS) commands to configure the IEEE 802.1p priority value of incoming
packets. This allows you to differentiate between various types of traffic, and provide different priority
levels.
QoS 802.1p configuration
This feature provides the switch the capability to filter IP packets based on the IEEE 802.1p bits in the
packet's VLAN header. The 802.1p bits specify the priority that you should give to the packets while
forwarding them. The packets with a higher (non-zero) priority bits are given forwarding preference over
packets with numerically lower priority bits value.
The following table describes the 802.1p Configuration commands.
Table 155 802.1p Configuration commands
Command
Description
qos transmit-queue mapping
<priority (0-7)> <queue (0-1)>
Maps the 802.1p priority to the Class of Service queue (COSq).
Enter the 802.1p priority value (0-7), followed by the Class of Service
queue (0-1) / (0-7) that handles the matching traffic. If the number
of Class of Service queue is set to 2 by default, you can configure 0
or 1 for the value of the queue. If the number is set to 8 you can
configure 0-7.
Command mode: Global configuration
qos transmit-queue weight-cos
<queue (0-1)> <weight (0-15)>
Configures the weight of the selected Class of Service queue
(COSq). Enter the queue number (0-1), followed by the scheduling
weight (0-15).
Command mode: Global configuration
qos transmit-queue number-cos
<2|8>
Sets the number of Class of Service queues for switch ports. The
default value is 2.
Command mode: Global configuration
default qos transmit-queue
Resets 802.1p configuration to default values.
Command mode: Global configuration
show qos transmit-queue
{mapping|number-cos|weight}
Displays the current 802.1p parameters.
Command mode: All
show qos transmit-queue
information
Displays the current 802.1p parameters, and the 802.1p priority level
for each port.
Command mode: All