Configuring The Ip-Precedence-To-Dscp Map - Cisco WS-C3550-12G Software Configuration Manual

Configuring QoS
This example shows how to modify and display the CoS-to-DSCP map:
Switch# configure terminal
Switch(config)# mls qos map cos-dscp 10 15 20 25 30 35 40 45
Switch(config)# end
Switch# show mls qos maps cos-dscp
Cos-dscp map:

Configuring the IP-Precedence-to-DSCP Map

You use the IP-precedence-to-DSCP map to map IP precedence values in incoming packets to a DSCP
value that QoS uses internally to represent the priority of the traffic.
Table 20-4
Table 20-4 Default IP-Precedence-to-DSCP Map
IP precedence value
DSCP value
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 IP-precedence-to-DSCP map:
Command
Step 1 configure terminal
Step 2
mls qos map ip-prec-dscp
dscp1...dscp8
Step 3
end
Step 4 show mls qos maps ip-prec-dscp
Step 5
copy running-config startup-config
To return to the default map, use the no mls qos ip-prec-dscp global configuration command.
This example shows how to modify and display the IP-precedence-to-DSCP map:
Switch# configure terminal
Switch(config)# mls qos map ip-prec-dscp 10 15 20 25 30 35 40 45
Switch(config)# end
Switch# show mls qos maps ip-prec-dscp
IpPrecedence-dscp map:
Catalyst 3550 Multilayer Switch Software Configuration Guide
20-40
cos: 0 1 2 3 4
--------------------------------
dscp: 10 15 20 25 30 35 40 45
shows the default IP-precedence-to-DSCP map:
0 1
0 8
Purpose
Enter global configuration mode.
Modify the IP-precedence-to-DSCP map.
For dscp1...dscp8, enter 8 DSCP values that correspond to the IP
precedence values 0 to 7. Separate each DSCP value with a space.
The DSCP range is 0 to 63.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
ipprec: 0 1 2 3 4
--------------------------------
dscp: 10 15 20 25 30 35 40 45
5 6 7
2 3 4
16 24 32
5 6 7
Chapter 20
5 6 7
40 48 56
Configuring QoS
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