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Advanced Configuration and Management Guide
Reassigning 802.1p Priorities to Different Queues
Tagged priority applies to tagged packets that come in from tagged ports. These packets have a tag in the header
that specifies the packet’s VLAN ID and its 802.1p priority tag value, which is 3 bits long.
By default, an HP device interprets the prioritization information in the 3-bit priority tag as follows.
Priority Level Queue
6, 7 qosp3
4, 5 qosp2
2, 3 qosp1
0, 1 qosp0
This is the HP default interpretation for the eight prioritization values in every context (VLAN, static MAC entry, IP
access policy, and so on). If the VLAN for the packet uses the default priority (0, equal to the qosp0 queue), then
the HP device uses the priority information in the packet to assign the packet to a queue on its incoming port.
However, if the VLAN or the incoming port itself has a higher priority than the packet’s 802.1p priority, the HP
device uses the VLAN priority or incoming port priority, whichever is higher.
You can specify how the HP device interprets the 3-bit priority information by reassigning the priority levels to
other queues. For example, if you want the device to disregard the 802.1p priority and instead assign the priority
based on other items (VLAN, port, and so on), configure the device to set all the 802.1p priorities to the best-effort
queue (qosp0). If a tagged packet’s 802.1p priority level is always in the qosp0 queue, then the packet’s outbound
queue is affected by other items such as incoming port, VLAN, and so on.
To reassign the priorities to different queues, use either of the following methods.
USING THE CLI
To reassign all 802.1p priority levels 2 – 7 to the best-effort queue (qosp0), enter the following commands:
HP9300(config)# qos tagged-priority 2 qosp0
HP9300(config)# qos tagged-priority 3 qosp0
HP9300(config)# qos tagged-priority 4 qosp0
HP9300(config)# qos tagged-priority 5 qosp0
HP9300(config)# qos tagged-priority 6 qosp0
HP9300(config)# qos tagged-priority 7 qosp0
HP9300(config)# write memory
Syntax: [no] qos tagged-priority <num> <queue>
The <num> parameter can be from 0 – 7 and specifies the IEEE 802.1 equivalent to one of the four QoS queues.
The <queue> parameter specifies the queue to which you are reassigning the priority level. You must specify one
of the named queues. The default names are qosp3, qosp2, qosp1, and qosp0. The example above reassigns
the 802.1p levels to queue qosp0. (There is no need to reassign levels 0 and 1 in this case, because they are
already assigned to qosp0 by default.)
USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-write access. The System configuration
dialog is displayed.
2. Click on the plus sign next to Configure in the tree view to expand the list of configuration options.
3. Click on the plus sign next to QoS in the tree view to expand the list of QoS option links.
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