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7. Show configuration of QoS
show mls qos maps [cos-intp | dscp-intp]
Display the configuration of QoS mapping.
show class-map [<class-map-name>]
Display the classified map information of
QoS.
show policy-map [<policy-map-name>]
Display the policy map information of QoS.
show mls qos {interface [<interface-id>]
[policy | queuing] | vlan <vlan-id>}
Display QoS configuration information on a
port.
19.3 QoS Example
Example 1:
Enable QoS function, change the queue out weight of port to 1:1:2:2, set it in trust CoS mode
and set the default CoS value of the port to 5.
The configuration steps are listed below:
Switch#config
Switch(config)#mls qos queue weight 1 1 2 2
Switch(Config-If-Ethernet1/1)#mls qos cos 5
Configuration result:
When QoS enabled in Global Mode, the egress queue bandwidth proportion of all ports is
1:1:2:2. When packets with CoS value coming in through port, it will be map to the queue out
according to the CoS value, CoS value 0 to 7 correspond to queue out 0, 0, 1, 1, 2, 2, 3, 3
respectively. If the incoming packet without CoS value, it is default to 5 and will be put in queue
2.
Example 2:
In port ethernet1/2, 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)#class-map c1
Switch(Config-ClassMap-c1)#match access-group 1
Switch(Config-ClassMap-c1)#exit
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