3Com 4200G 12-Port Configuration Manual page 241

Setting to Trust the
DSCP Precedence of the
Packets
Refer to Trusting the DSCP Precedence of the Packets for the description on trusting
the DSCP precedence of the packets.
You can modify the "DSCP-->other precedence" mapping relationship as required.
Table 192 The "DSCP-->other precedence" mapping table and its default value
DSCP Local-pre
0 to 7 0
8 to 15 1
16 to 23 2
24 to 31 3
32 to 39 4
40 to 47 5
48 to 55 6
56 to 63 7
The switch also provides a DSCP->DSCP mapping table. When the remap mode is
selected, the switch will firstly obtain a new DSCP precedence by mapping the DSCP
precedence of the packet, and then search for the DSCP->other priority mapping
table according to the new DSCP precedence and assign other precedence for the
packets.
Table 193 The "DSCP-->DSCP" mapping table and its default value
DSCP
0
1
.
.
.
61
62
63
Configuration prerequisites
The priority trust mode is specified to trusting the DSCP precedence of the packets
■
The mode adopted in trusting the DSCP precedence: automap, remap or the
■
default mode is specified
The value of the "DSCP-->other precedence" mapping table is specified
■
If the remap mode is adopted, the value of the DSCP->DSCP mapping table needs
■
specifying
Configuring Priority Mapping 227
Drop
1
1
1
1
0
0
0
0
New DSCP
0
1
.
.
.
61
62
63
802.1p
1
2
0
3
4
5
6
7