LevelOne GEL-1061, User Manual

Page: 200 / 500

Chapter 9
| Class of Service
Layer 3/4 Priority Settings
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Drop Precedence – Drop precedence used for controlling traffic congestion.
(Range: 0 - Green, 3 - Yellow, 1 - Red)
Web Interface
To map DSCP values to internal PHB/drop precedence:
1.
Click Traffic, Priority, DSCP to DSCP.
2.
Select Configure from the Action list.
3.
Select the port to configure.
4.
Set the PHB and drop precedence for any DSCP value.
5.
Click Apply.
Figure 119: Configuring DSCP to DSCP Internal Mapping
Table 13: Default Mapping of DSCP Values to Internal PHB/Drop Values
ingress-
dscp1
ingress-
dscp10
0 1 2 3 4 5 6 7 8 9
0 0,0 0,1 0,0 0,3 0,0 0,1 0,0 0,3 1,0 1,1
1 1,0 1,3 1,0 1,1 1,0 1,3 2,0 2,1 2,0 2,3
2 2,0 2,1 2,0 2,3 3,0 3,1 3,0 3,3 3.0 3,1
3 3,0 3,3 4,0 4,1 4,0 4,3 4,0 4,1 4.0 4,3
4 5,0 5,1 5,0 5,3 5,0 5,1 6,0 5,3 6,0 6,1
5 6,0 6,3 6,0 6,1 6,0 6,3 7,0 7,1 7.0 7,3
6 7,0 7,1 7,0 7,3
The ingress DSCP is composed of ingress-dscp10 (most significant digit in the left column) and
ingress-dscp1 (least significant digit in the top row (in other words,
ingress-dscp = ingress-dscp10 * 10 + ingress-dscp1);
and the corresponding internal-dscp is shown at the intersecting cell in the table.
The ingress DSCP is bitwise ANDed with the binary value 11 to determine the drop precedence. If the
resulting value is 10 binary, then the drop precedence is set to 0.