18.
Quality of Service
MN700004 Rev 01
219
qos remark
Changes the 802.1p priority of each tagged outgoing packet as it leaves
the switch, by assigning an 802.1p priority level to each transmission
queue.
show qos priority-txq-
map
Displays the priority mapping assignments.
Configuring Priority Value Mapping to QoS Queues
The
qos map
command, in Global Configuration mode, assigns 802.1p priority level to the
Transmit-Queue mapping.
Table 18-2 shows the default mapping of priority levels to the eight transmit queues.
Command Syntax
device-name
(config)#
qos map
<
priority
> {
txq0
|
txq1
|
txq2
|
txq3
|
txq4
|
txq5
|
txq6
|
txq7
}
Argument Description
p r i o r i t y T h e 8 0 2 . 1 p p r i o r i t y l e v e l
i n r a n g e < 0 - 7 > .
txq0
Transmit queue 0.
txq1
Transmit queue 1.
txq2
Transmit queue 2.
txq3
Transmit queue 3.
txq4
Transmit queue 4.
txq5
Transmit queue 5.
txq6
Transmit queue 6.
txq7
Transmit queue 7.
Example
The default mapping of 802.1p priority level 3 is txq1. In the following example, we change
the mapping of priority level 3 to txq2, and verify the change with the
show qos priority-txq-
map
command.
device-name
(config)#
qos map 3 txq2
device-name
(config)#
exit
device-name
#
show qos priority-txq-map
===============================
priority-level | txq
-----------------+-------------
0 | 0
1 | 1
2,3 | 2
| 3
4 | 4
5 | 5
6 | 6
7 | 7
