Cisco Catalyst 3750-E - Configuring Dscp Maps

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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Chapter 37 Configuring QoS
Configuring Standard QoS
Switch(config-pmap)# exit
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# service-policy input aggflow1
Switch(config-if)# exit
Configuring DSCP Maps
• Configuring the CoS-to-DSCP Map, page 37-74 (optional)
• Configuring the IP-Precedence-to-DSCP Map, page 37-75 (optional)
• Configuring the Policed-DSCP Map, page 37-76 (optional, unless the null settings in the map are
not appropriate)
• Configuring the DSCP-to-CoS Map, page 37-77 (optional)
• Configuring the DSCP-to-DSCP-Mutation Map, page 37-78 (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 37-12 sh
ows the default CoS-to-DSCP map.
If these values are not appropriate for your network, you need to modify them.
Ta b l e 37-12 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