Allied Telesis AT-8100 Series - Manual (Page 1661)

AT-8100 Switch Command Line User’s Guide
1661
Prioritizing CoS and DSCP
By default, the DSCP field in Layer 3 packets and the CoS field in Layer 2
frames are ignored by the software. In addition, Trust CoS is enabled by
default. To map a DSCP value to a queue on an egress port, use the
TRUST DSCP command, which is located in the Class Map mode. See
Table 209 and Table 210 for the default mappings. As you can see from
the tables, the highest egress queue is seven, which is assigned the
highest, CoS or DSCP, value.
Table 209. CoS Default Mapping
Egress
Queue
CoS Value
2 0
0 1
1 2
3 3
4 4
5 5
6 6
7 7
Table 210. DSCP Default Mapping
Egress
Queue
DSCP
Value
0 0 - 7
1 8 - 15
2 16 - 23
3 24 - 31
4 32 - 39
5 40 - 47
6 48 - 55
7 56 - 63