Specifications

Traffic Groupings
ExtremeWare XOS 11.0 Concepts Guide 113
field is located directly following the 802.1Q type field and preceding the 802.1Q VLAN ID, as shown in
Figure 8.
Figure 8: Ethernet packet encapsulation
Observing 802.1p information. When ingress traffic that contains 802.1p prioritization information is
detected by the switch, that traffic is mapped to various hardware queues on the egress port of the
switch. Eight hardware queues are supported. The transmitting hardware queue determines the
bandwidth management and priority characteristics used when transmitting packets.
To control the mapping of 802.1p prioritization values to hardware queues, 802.1p prioritization values
can be mapped to a QoS profile. The default mapping of each 802.1p priority value to QoS profile is
shown in Table 19.
Changing 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 mapping of 802.1p priority value to QoS profile, use the following command:
configure dot1p type <dot1p_priority> [qosprofile <qosprofile>]
Replacing 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.
Table 19: Default 802.1p priority value-to-QoS profile mapping
Priority Value QoS Profile
0 QP1
1 QP2
2 QP3
3 QP4
4 QP5
5 QP6
6 QP7
7 QP8
EW_024
Source
address
802.1Q
type
802.1p
priority
802.1Q
VLAN ID
IP packet CRC
Destination
address
8100