User’s Manual
4.9.3 Port Classification
This page allows you to configure the basic QoS Ingress Classification settings for all switch ports. The Port Classification
screen in Figure 4-9-2 appears.
Figure 4-9-2 : QoS Ingress Port Classification page Screenshot
The page includes the following fields:
Object Description
• Port
The port number for which the configuration below applies.
• CoS
Controls the default class of service.
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 and the frame is tagged, then the frame is classified to
a CoS that is based on the PCP value in the tag as shown below. Otherwise the
frame is classified to the default CoS.
PCP value:
0 1 2 3 4 5 6 7
CoS value:
1 0 2 3 4 5 6 7
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.
All means all ports will have one specific setting.
• DPL
Controls the default drop precedence level.
All frames are classified to a drop precedence level.
If the port is VLAN aware and the frame is tagged, then the frame is classified to
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