Cisco Systems 3560 Manual De Usuario

You use the DSCP-to-CoS map to generate a CoS value, which is used to select one of the four egress 
queues.

 shows the default DSCP-to-CoS 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 DSCP-to-CoS map. This 
procedure is optional.

To return to the default map, use the no mls qos dscp-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(config)# mls qos map dscp-cos 0 8 16 24 32 40 48 50 to 0

Switch(config)# end

Switch# show mls qos maps dscp-cos

Dscp-cos map:

     d1 :  d2 0  1  2  3  4  5  6  7  8  9

     ---------------------------------------

      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

0–7

0

8–15

1

16–23

2

24–31

3

32–39

4

40–47

5

48–55

6

56–63

7

Enter global configuration mode.

mls qos map dscp-cos dscp-list to cos

Modify the DSCP-to-CoS map. 

For dscp-list, enter up to eight DSCP values separated by spaces. 
Then enter the to keyword.

For cos, enter the CoS value to which the DSCP values correspond. 

The DSCP range is 0 to 63; the CoS range is 0 to 7.

Return to privileged EXEC mode.

Verify your entries.

(Optional) Save your entries in the configuration file.