7.5.3. QoS
The QoS classification is handled in the switch Ingress block. The Ingress block does not perform the
QoS switching policy, which is the task of the Queue Controller.
See the Functional diagram.
802.1p
Fig. 7.24: Menu Switch settings - 802.1p
This QoS technique also known as class of service (CoS), is a 3-bit field called the Priority Code Point
(PCP) within an Ethernet frame header when using VLAN tagged frames as defined by IEEE 802.1Q.
It specifies a priority value of between 0 and 7 inclusive that can be used by QoS disciplines to differ-
entiate traffic. The value 0 is generally taken as the lowest priority and 7 as the highest priority.
Port name
Identification of the internal switch port. The switch ports are connected to an ex-
ternal port or to an internal device (radio modem, management CPU).
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