Manual

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Москва, Новозаводская ул., 18, стр. 1
104
Typical QoS topology
As shown in the figure, inside the block is a QoS domain, Switch1 classifies different traffics
and assigns different IP precedences. For example, set CoS precedence for packets from
segment 192.168.1.0 to 5 on port ethernet1/0/1(set the internal priority to 40, set the default
intp-dscp mapping to 40-40, the corresponding IP precedence to 5). The port connecting to
switch2 is a trunk port. In Switch2, set port ethernet 1/0/1 that connecting to swtich1 to trust
dscp. Thus inside the QoS domain, packets of different priorities will go to different queues and
get different bandwidth.
The configuration steps are listed below:
QoS configuration in Switch1:
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
Switch(config)#policy-map p1
Switch(Config-PolicyMap-p1)#class c1
Switch(Config-PolicyMap-p1-Class-c1)#set ip precedence 40
Switch(Config-PolicyMap-p1-Class-c1)#exit
Switch(Config-PolicyMap-p1)#exit
Switch(config)#interface ethernet 1/0/1
Switch(Config-If-Ethernet1/0/1)#service-policy input p1
QoS configuration in Switch2:
Switch#config
Server
Switch
3
Switch
1
Switch
2
Trunk
QoS area