User guide
9-14 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
Q
UALITY
OF
S
ERVICE
(Q
O
S)
802.1
P
C
OMMANDS
Tab le 9-7 shows the commands used to configure 802.1p priority. Two are explained in
more detail in the following paragraphs.
C
HANGING THE DEFAULT 802.1P MAPPING
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 can be mapped to a particular QoS profile and with specific 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>
R
EPLACING
802.1
P
P
RIORITY
I
NFORMATION
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 the packet. To replace802.1p priority information, use the
command:
enable dot1p replacement ports [<portlist> | all]
Table 9- 7: 802.1p Configuration Commands
Command Description
config dot1p type <dot1p_priority> qosprofile
<qosprofile>
Configures the default QoS profile to 802.1p
priority mapping. The value for dot1p_priority is
an integer between 0 and 7.
disable dot1p replacement ports [<portlist> |
all]
Disables the ability to overwrite 802.1p priority
values for a given set of ports.
enable dot1p replacement ports [<portlist> |
all]
Enables the 802.1p priority field to be overwritten
on egress according to the QoS profile to 802.1p
priority mapping for a given set of ports.
show dot1p Displays the 802.1p-to-QoS profile mappings.