Cisco Systems 3750E Configuring Dscp Maps, Configuring the CoS-to-DSCP Map, CoS Value Dscp Value

Chapter 36 Configuring QoS

Configuring Standard QoS

Switch(config-pmap-c)# trust dscp

Switch(config-pmap-c)#police aggregate transmit1

Switch(config-pmap-c)# exit

Switch(config-pmap)# class ipclass2

Switch(config-pmap-c)# set dscp 56

Switch(config-pmap-c)#police aggregate transmit1

Switch(config-pmap-c)# exit

Switch(config-pmap)# exit

Switch(config)# interface gigabitethernet2/0/1

Switch(config-if)#service-policy input aggflow1

Switch(config-if)# exit

Configuring DSCP Maps

These sections contain this configuration information:

•Configuring the CoS-to-DSCP Map, page 36-63(optional)

•Configuring the IP-Precedence-to-DSCP Map, page 36-64(optional)

•Configuring the Policed-DSCP Map, page 36-65(optional, unless the null settings in the map are not appropriate)

•Configuring the DSCP-to-CoS Map, page 36-66(optional)

•Configuring the DSCP-to-DSCP-Mutation Map, page 36-67(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 36-12shows the default CoS-to-DSCP map.

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

If these values are not appropriate for your network, you need to modify them.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		36-63