DSCP Based: to set the Switch DSCP (Differentiated Services Code
Point) based, there are four type of DSCP, Class Selector (CS) PHB,
Assured Forwarding (AF) PHB, Expedited Forwarding (EF) PHB and
Other DSCP Values (Local/Experimental Use). In each DSCP, four
kinds of QoS can be selected, Lowest, Low, Normal and High.
Figure 27.
Note: In a legacy half-duplex enviroment, packet might lost when QoS is
enabled.
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