Advanced Configuration and Management Guide
•You can classify packets and assign them to specific queues based on the following criteria:
•Incoming port (sometimes called ingress port)
•IP source and destination addresses
•Layer 4 source and destination information (for all IP addresses or specific IP addresses)
•Static MAC entry
•AppleTalk socket number
•Layer 2
•802.1q tag
By default, all the traffic types listed above except the 802.1q tagged packets are in the best effort queue, which is the lowest priority queue. The 802.1q tagged packets are assigned to a queue based on the priority level (0 – 7) in the packet’s tag. The default mapping of the priority levels to the queues is as follows.
Priority Level | Queue |
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6, 7 | qosp3 |
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4, 5 | qosp2 |
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2, 3 | qosp1 |
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0, 1 | qosp0 |
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In cases where a packet matches more than one traffic type, the highest queue level among the traffic type is used. For example, if a tagged packet arrives on a tagged port and the 802.1p priority is 4 (qosp2) but the packet contains IP source and destination information that matches an IP access policy configured to assign the traffic to priority 7 (qosp3), the device places the packet in qosp3 of the outbound port.
Automatic Queue Mapping for IP Type Of Service (TOS) Values
HP devices that support QoS automatically examine the first two bits in the Type of Service (TOS) header in each IP packet as it enters the device on a 10/100 port. The device then places the packet in the QoS queue that corresponds to the TOS value.
The TOS value in the first two bits can be one of the following.
TOS value (binary) | Queue |
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11 | qosp3 |
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10 | qosp2 |
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01 | qosp1 |
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00 | qosp0 |
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As the packet moves through the system, if the packet matches other QoS allocations you have configured, the packet is moved into a higher queue accordingly. For example, if the TOS values place the packet in qosp1, but the packet is part of a
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