SNR S2940-8G-v2, Руководство по настройке

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SNR S2940-8G-v2 Switch Configuration Guide
QoS Configuration
When QoS enabled in Global Mode, the egress queue bandwidth proportion of port ether-
net1/0/1 is 1:1:2:2:4:4:8:8. When packets have CoS value coming in through port ethernet1/0/1,
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 queue6. All passing packets would not have their DSCP values changed.
Example 2:
In port ethernet1/0/2, 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
Switch(config)#policy-map p1
Switch(Config-PolicyMap-p1)#class c1
Switch(Config-PolicyMap-p1-Class-c1)#policy 10000 4000 exceed-action drop
Switch(Config-PolicyMap-p1-Class-c1)#exit
Switch(Config-PolicyMap-p1)#exit
Switch(config)#interface ethernet 1/0/2
Switch(Config-If-Ethernet1/0/2)#service-policy input p1
Configuration result:
An ACL name 1 is set to matching segment 192.168.1.0. Enable QoS globally, create a class
map named c1, matching ACL1 in class map; create another policy map named p1 and refer to
c1 in p1, set appropriate policies to limit bandwidth and burst value. Apply this policy map on port
ethernet1/0/2. After the above settings done, bandwidth for packets from segment 192.168.1.0
through port ethernet 1/0/2 is set to 10 Mb/s, with a burst value of 4 MB, all packets exceed this
bandwidth setting in that segment will be dropped.
Example 3:
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. The port connecting to switch2 is a trunk port. In Switch2,
set port ethernet 1/0/1 that connecting to swtich1 to trust cos. 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 5
Switch(Config-PolicyMap-p1-Class-c1)#exit
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