Cisco 4500M Software Manual page 424

Configuring QoS
To modify the DSCP-to-CoS map, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# qos map dscp dscp-list
to cos cos
Step 3
Switch(config)# end
Step 4
Switch# show qos maps dscp to cos
Step 5
Switch# copy running-config
startup-config
To return to the default map, use the no qos dscp to cos global configuration command.
This example shows how to map DSCP values 0, 8, 16, 24, 32, 40, 48, and 50 to CoS value 0 and to
display the map:
Switch# configure terminal
Switch(config)# qos map dscp 0 8 16 24 32 40 48 50 to cos 0
Switch(config)# end
Switch# show qos maps dscp cos
Dscp-cos map:
In the above DSCP-to-CoS map, the CoS values are shown in the body of the matrix. The d1 column
Note
specifies the most-significant digit of the DSCP; the d2 row specifies the least-significant digit of the
DSCP. The intersection of the d1 and d2 values provides the CoS value. For example, in the
DSCP-to-CoS map, a DSCP value of 08 corresponds to a CoS value of 0.
Software Configuration Guide—Release 12.2(25)EW
29-48
d1 : d2 0 1 2 3 4
---------------------------------------
0 : 00 00 00 00 00 00 00 00 00 01
1 : 01 01 01 01 01 01 00 02 02 02
2 : 02 02 02 02 00 03 03 03 03 03
3 : 03 03 00 04 04 04 04 04 04 04
4 : 00 05 05 05 05 05 05 05 00 06
5 : 00 06 06 06 06 06 07 07 07 07
6 : 07 07 07 07
Purpose
Enters global configuration mode.
Modifies the DSCP-to-CoS map.
• For dscp-list, enter up to 8 DSCP values separated by spaces.
Then enter the to keyword.
• For cos, enter only one CoS value to which the DSCP values
correspond.
The DSCP range is 0 to 63; the CoS range is 0 to 7.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
5 6 7 8 9
Chapter 29 Configuring QoS
OL-6696-01