Quality of Service (QoS)

Assigning QoS Priorities to Traffic

By default, traffic of the following categories is forwarded using the best-effort queue (qosp0):

•Incoming port (sometimes called the ingress port)

•Port-based VLAN membership

•Static destination MAC entry

•Layer 3 and Layer 4 information (IP and TCP/UDP source and destination information)

•AppleTalk socket

NOTE: Tagged VLAN traffic is placed in a queue corresponding to the 802.1p priority in the tag by default. Thus, if a tagged packet contains priority 7 in the tag (corresponding to the premium queue), the device places this packet in the premium queue of the packet’s outbound port. You can change or remove the effect of the 802.1p priority in the tags by reassigning the priority levels to different queues. See “Reassigning 802.1p Priorities to Different Queues” on page 2-14.

Although it is possible for a packet to qualify for an adjusted QoS priority based on more than one of the criteria above, the system always gives a packet the highest priority for which it qualifies. Thus, if a packet is entitled to the premium queue because of its IP source and destination addresses, but is entitled only to the high queue because of its incoming port, the system places the packet in the premium queue on the outgoing port.

When you apply a QoS priority to one of the items listed above, you specify a number from

0 – 7. The number specifies the IEEE 802.1 equivalent to one of the four HP QoS queues. The numbers correspond to the queues as follows.

Priority Level

Queue

 

 

6, 7

qosp3

 

 

4, 5

qosp2

 

 

2, 3

qosp1

 

 

0, 1

qosp0

 

 

The following sections describe how to change the priority for each of the items listed above.

Changing a Port’s Priority

To change a port’s QoS priority, use one of the following methods. The priority applies to outbound traffic on the port.

USING THE CLI

To change the QoS priority of port 1/1 to the high queue (qosp2), enter the following commands:

HP9300(config)# interface ethernet 1/1

HP9300(config-if-1/1)# priority 5

HP9300(config-if-1/1)# write memory

Syntax: [no] priority <num>

The <num> parameter can be from 0 – 7 and specifies the IEEE 802.1 equivalent to one of the four QoS queues.

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