Intel 480T, User Manual

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C H A P T E R 8 Quality of Service (QoS)
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As described in Table 30, by default a QoS profile is mapped to a
hardware queue, and each QoS profile has configurable bandwidth
parameters and priority. In this way, an 802.1p priority value seen
on ingress may be mapped to a particular QoS profile and have the
desired bandwidth management and priority behavior.
To change the default mappings of QoS profiles to 802.1p priority
values, use the command:
config dot1p type <dot1p_priority> qosprofile
<qosprofile>
Overwriting 802.1p Priority Information
By default, 802.1p priority information is not replaced or
manipulated, and the information observed on ingress is preserved
when transmitting the packet. This behavior is not affected by the
switching or routing configuration of the switch.
However, the switch is capable of inserting and/or overwriting
802.1p priority information when it transmits an 802.1Q tagged
frame. If 802.1p replacement is enabled, the 802.1p priority
information that is transmitted is determined by the hardware queue
that is used when transmitting a packet. To enable the replacement
of 802.1p priority information, use the command:
enable dot1p replacement ports [<portlist> | all]
802.1p priority information is replaced according to the hardware
queue that is used when transmitting from the switch. The mapping
is described in Table 34. This mapping cannot be changed.
5 Qp6
6 Qp7
7 Qp8
Table 33: 802.1p Priority Value-to-QoS Profile Mapping
Priority Value QoS Profile