4.27.1 QoS Port Classification Configuration

The QoS Port Classification page allows you to configure the basic QoS Classification settings for all switch ports.

Figure 4-95. QoS Port Classification

The QoS Port Classification page has the following parameters:

  • Port: The port number for which the configuration below applies
  • CoS: 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 DPL value. 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.
  • Tag Class: Shows the classification mode for tagged frames on this port
    • Disabled: Uses default CoS and DPL for tagged frames.
    • Enabled: Uses mapped versions of PCP and DEI for tagged frames. Click on the mode 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.
  • DSCP Based: Click to Enable DSCP Based QoS Ingress Port Classification
  • Key Type: The key type specifying the key generated for frames received on the port. The allowed values are:
    • Normal: Half key, match outer tag, SIP/DIP and SMAC/DMAC
    • Double Tag: Quarter key, match inner and outer tag
    • IP Address: Half key, match inner and outer tag, SIP and DIP. For non-IP frames, match outer tag only.
    • MAC and IP Address: Full key, match inner and outer tag, SMAC, DMAC, SIP and DIP. Filtering on DMAC type (unicast/multicast/broadcast) is supported for any key type.
  • Address Mode: The IP/MAC address mode specifying whether the QCL classification must be based on source (SMAC/SIP) or destination (DMAC/DIP) addresses on this port. This parameter is only used when the key type is Normal. The allowed values are:
    • Source: Enable SMAC/SIP matching
    • Destination: Enable DMAC/DIP matching