36-51
Cisco IE 3000 Switch Software Configuration Guide
OL-13018-03
Chapter 36 Configuring QoS
Configuring Standard QoS
•
Configuring the DSCP-to-CoS Map, page 36-54
(optional)
•
Configuring the DSCP-to-DSCP-Mutation Map, page 36-55
(optional, unless the null settings in the
map are not appropriate)
All the maps, except the DSCP-to-DSCP-mutation map, are globally defined and are applied to all ports.
Configuring the CoS-to-DSCP Map
You use the CoS-to-DSCP map to map CoS values in incoming packets to a DSCP value that QoS uses
internally to represent the priority of the traffic.
Table 36-12
shows the default CoS-to-DSCP map.
If these values are not appropriate for your network, you need to modify them.
Beginning in privileged EXEC mode, follow these steps to modify the CoS-to-DSCP map. This
procedure is optional.
To return to the default map, use the
no mls qos cos-dscp
global configuration command.
Table 36-12
Default CoS-to-DSCP Map
CoS Value
DSCP Value
0
0
1
8
2
16
3
24
4
32
5
40
6
48
7
56
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
mls qos map cos-dscp
dscp1...dscp8
Modify the CoS-to-DSCP map.
For
dscp1...dscp8
, enter eight DSCP values that correspond to CoS values
0 to 7. Separate each DSCP value with a space.
The DSCP range is 0 to 63.
Step 3
end
Return to privileged EXEC mode.
Step 4
show mls qos maps cos-dscp
Verify your entries.
Step 5
copy running-config startup-config
(Optional) Save your entries in the configuration file.
