Configuring MPLS QoS 举例

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#