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CHAPTER 5: QUALITY OF SERVICE
Parameter description:
Port: The port number for which the configuration below applies.
Queue Priority: Controls the default CoS value.
– All frames are classified to a CoS. There is a one to one mapping between CoS, queue and priority. A CoS of 0 (zero) has the
lowest priority.
– If the port is VLAN aware, the frame is tagged and Tag Class. is enabled, then the frame is classified to a CoS that is mapped from
the PCP and DEI value in the tag. Otherwise, the frame is classified to the default CoS.
– The classified CoS can be overruled by a QCL entry.
NOTE: If the default CoS has been dynamically changed, then the actual default CoS is shown in parentheses after the configured
default CoS.
DPL: Controls the default drop precedence level.
– All frames are classified to a drop precedence level.
– If the port is VLAN aware, the frame is tagged and Tag Class. is enabled, then the frame is classified to a DPL that is mapped from
the PCP and DEI value in the tag. Otherwise, the frame is classified to the default DPL.
– The classified DPL can be overruled by a QCL entry.
PCP: Controls the default PCP value.
– All frames are classified to a PCP value.
– If the port is VLAN aware and the frame is tagged, then the frame is classified to the PCP value in the tag. Otherwise, the frame is
classified to the default PCP value.
DEI: Controls the default DEI value.
– All frames are classified to a DEI value.
– If the port is VLAN aware and the frame is tagged, then the frame is classified to the DEI value in the tag. Otherwise, the frame is
classified to the default DEI value.
DSCP Based: Click to Enable DSCP Based QoS Ingress Port Classification.
WRED Group: Controls the WRED group membership.
Buttons
Apply: Click to save changes.
Reset: Click to undo any changes made locally and revert to previously saved values.
PCP Classification: Shows the classification mode for tagged frames on this port.
– Disabled: Use default CoS and DPL for tagged frames.
– Enabled: Use mapped versions of PCP and DEI for tagged frames.
Click on the mode in order to configure the mode and/or mapping.
NOTE: This setting has no effect if the port is VLAN unaware. Tagged frames received on VLAN unaware ports are always classified
to the default CoS and DPL.