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Switch(Config)#mls qos map cos-dscp 0 1 2 3 4 5 6 7
13.1.3 QoS Example
Scenario 1:
Enable QoS function, change the queue out weight of port ethernet 1/1 to 1: 1: 2: 2: 4: 4: 8:
8, and set the port in trust CoS mode without changing DSCP value, and set the default
CoS value of the port to 5.
The configuration steps are listed below:
Switch#config
Switch(Config)#mls qos
Switch(Config)#interface ethernet 1/1
Switch(Config-Ethernet1/1)# queue bandwidth 1 1 2 2 4 4 8 8
Switch(Config-Ethernet1/1)#mls qos trust cos pass-through dscp
Switch(Config-Ethernet1/1)#mls qos cos 5
Configuration result:
When QoS enabled in Global Mode, the egress queue bandwidth proportion of port
ethernet 1/1 is 1: 1: 2: 2: 4: 4: 8: 8. When packets have CoS value coming in through port
ethernet 1/1, it will be map
to the queue out according to the CoS value, CoS value 0 to 7 correspond to queue out 1,
2, 3, 4, 5, 6, 7, 8, respectively. If the incoming packet has no CoS value, it is default to 5
and will be put in queue 6. All passing packets would not have their DSCP values
changed.
Scenario 2:
In port ethernet 1/2, set the bandwidth for packets from segment 192.168.1.0 to 10 Mb/s,
with a burst value of 4 MB, all packets exceed this bandwidth setting will be dropped.
The configuration steps are listed below:
Switch#config
Switch(Config)#access-list 1 permit 192.168.1.0 0.0.0.255
Switch(Config)#mls qos
Switch(Config)#class-map c1
Switch(Config-ClassMap)#match access-group 1
Switch(Config-ClassMap)# exit
Switch(Config)#policy-map p1