Configuring MPLS QoS 举例

来源：作者：出处：巧巧读书 2006-07-25 进入讨论组

关键词：
router
mpls
qos

QQRead:http://www.qqread.com/net-case/p111175081.html
　　This example shows that all packets that contain MPLS experimental value 4 are matched by the traffic class exp4:
　　
　　Router(config)# class-map exp4
　　Router(config-cmap)# match mpls experimental 4

　　Router(config-cmap)# exit
　　
　　
　　This example shows that the value in the MPLS experimental field of each packet that is matched by the class-map exp4 is set to 5:
　　
　　Router(config)# policy-map set_experimental_5
　　Router(config-pmap)# class exp4
　　Router(config-pmap-c)# set mpls experimental 5
　　Router(config-pmap-c)# exit
　　Router(config-pmap)# exit
　　
　　This example shows that the service policy set_experimental_5 is attached to an POS output interface:
　　
　　Router(config)# interface POS6/1
　　Router(config-if)# service-policy output set_experimental_5
　　Router(config-if)# exit
　　
　　Ingress PE Router Configuration
　　In the following example, IP packets with IP precedence 1 entering an MPLS network are shaped to 2000000 bits per second and set to MPLS experimental field 5. When IP packets with IP precedence 0 enter the MPLS network, they are shaped to 3000000 bits per second and set to MPLS experimental field 3. When IP packets with any other IP precedence value enter the MPLS network, they are shaped to 5000000 bits per second.
　　
　　Step 1 Define two traffic classes:
　　Router(config)# class-map gold
　　Router(config-cmap)# match mpls experimental 1
　　Router(config-cmap)# exit
　　Router(config)# class-map silver
　　Router(config-cmap)# match mpls experimental 0
　　Router(config-cmap)# exit
　　
　　Step 2 Define a policy to take different actions
　　Router(config)# policy-map policy1
　　Router(config-pmap)# class gold
　　Router(config-pmap-c)# set mpls experimental 5
　　Router(config-pmap-c)# shape average 2000000
　　Router(config-pmap-c)# exit
　　Router(config-pmap)# class silver
　　Router(config-pmap-c)# set mpls experimental 3
　　Router(config-pmap-c)# shape average 3000000
　　Router(config-pmap-c)# exit
　　Router(config-pmap)# class class-default
　　Router(config-pmap-c)# shape average 5000000
　　Router(config-pmap-c)# exit
　　Router(config-pmap)# exit
　　
　　Step 3 Apply the policy to the output interface
　　Router(config)# interface GE-WAN7/1
　　Router(config-if)# service-policy output policy1
　　
　　Step 4 Verify the QoS configuration:
　　Router# show policy-map interface POS6/2
　　POS6/2
　　service-policy outputolicy1
　　class-map:gold (match-all)
　　0 packets, 0 bytes
　　30 second offered rate 0 bps, drop rate 0 bps
　　match:mpls experimental 1
　　queue size 0, queue limit 500
　　packets output 0, packet drops 0
　　tail/random drops 0, no buffer drops 0, other drops 0
　　set:
　　mpls experimental 5
　　shape:cir 2000000, Bc 8000, Be 8000
　　output bytes 0, shape rate 0 bps
　　class-map:silver (match-all)
　　9521 packets, 9425790 bytes
　　30 second offered rate 3681000 bps, drop rate 1505000 bps
　　match:mpls experimental 0
　　queue size 0, queue limit 128
　　packets output 2845, packet drops 6676
　　tail/random drops 6676, no buffer drops 0, other drops 0
　　set:
　　mpls experimental 3
　　shape:cir 3000000, Bc 12000, Be 12000
　　output bytes 2816550, shape rate 642000 bps
　　class-map:class-default (match-any)
　　0 packets, 0 bytes
　　30 second offered rate 0 bps, drop rate 0 bps
　　match:any
　　0 packets, 0 bytes
　　30 second rate 0 bps
　　queue size 0, queue limit 128
　　packets output 0, packet drops 0
　　tail/random drops 0, no buffer drops 0, other drops 0
　　shape:cir 5000000, Bc 20000, Be 20000
　　output bytes 0, shape rate 0 bps
　　Router#