Cisco 2975 - Catalyst LAN Base Switch, Руководство по настройке программного обеспечения

Страница: 781 / 982

33-57
Catalyst 2975 Switch Software Configuration Guide
OL-19720-02
Chapter 33 Configuring QoS
Configuring Standard QoS
Switch(config-pmap)# class class-default
Switch(config-pmap-c)# set dscp 10
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 33-57 (optional)
• Configuring the IP-Precedence-to-DSCP Map, page 33-58 (optional)
•
Configuring the Policed-DSCP Map, page 33-59 (optional, unless the null settings in the map are
not appropriate)
• Configuring the DSCP-to-CoS Map, page 33-60 (optional)
•
Configuring the DSCP-to-DSCP-Mutation Map, page 33-61 (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 33-12 shows the default CoS-to-DSCP map.
If these values are not appropriate for your network, you need to modify them.
Table 33-12 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