一个视频Qos配置案例

　　本例中用LLQ来实现Video的QoS

　　中心点 : Router 1(7507)

　　In between router : Router 2(3640)

　　Remote side : Router 3(2620)

　　中心点: Router 1

　　class-map match-all OFIS_TO_MCU

　　match access-group 100

　　class-map match-all MCU_TO_OFIS

　　match access-group 101

　　!

　　policy-map TO_MCU //定义LLQ策略

　　class OFIS_TO_MCU

　　priority 1518 //定义为Video预留的带宽，注意要在视频带宽基础上加上25%的开销

　　set ip precedence 5

　　class class-default

　　fair-queue

　　policy-map TO_OFIS

　　class MCU_TO_OFIS

　　priority 1518

　　set ip precedence 5

　　class class-default

　　fair-queue

　　!

　　interface FastEthernet1/0/0

　　no ip address

　　no ip route-cache distributed

　　full-duplex

　　!

　　interface FastEthernet1/0/0.1

　　description HQ1 LAN

　　encapsulation dot1Q 1

　　ip address 129.2.80.21 255.255.0.0

　　service-policy output TO_MCU //在接口下应用策略

　　!

　　interface Serial1/0/0

　　description Router 1 to ROUTER 2

　　ip address 206.141.24.1 255.255.255.0

　　ip route-cache policy

　　no ip route-cache distributed

　　service-policy output TO_OFIS

　　!

　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical//通过ACL匹配来激活策略

　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical

　　!

　　-------------------------------------------------------------------------------------------------

　　In between router : Router 2

　　class-map OFIS_TO_MCU

　　match access-group 100

　　class-map MCU_TO_OFIS

　　match access-group 101

　　!

　　!

　　policy-map TO_MCU

　　class OFIS_TO_MCU

　　priority 1518

　　class class-default

　　fair-queue

　　policy-map TO_OFIS

　　class MCU_TO_OFIS

　　priority 1518

　　class class-default

　　fair-queue

　　!

　　interface Serial2/0

　　description Router 2 to Router 1

　　bandwidth 2048

　　ip address 206.141.24.2 255.255.255.0

　　no ip directed-broadcast

　　ip route-cache policy

　　no ip mroute-cache

　　service-policy output TO_MCU

　　!

　　interface Serial2/1

　　description Router 2 to Router 3

　　bandwidth 2048

　　ip address 218.141.2.1 255.255.255.0

　　no ip directed-broadcast

　　ip route-cache policy

　　service-policy output TO_OFIS

　　!

　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical

　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical

　　----------------------------------------------------------------------------------------------------

　　Remote side : Router 3

　　class-map OFIS_TO_MCU

　　match access-group 100

　　class-map MCU_TO_OFIS

　　match access-group 101

　　!

　　!

　　policy-map TO_MCU

　　class OFIS_TO_MCU

　　priority 1518

　　class class-default

　　fair-queue

　　policy-map TO_OFIS

　　class MCU_TO_OFIS

　　priority 1518

　　class class-default

　　fair-queue

　　!

　　interface FastEthernet0/0

　　ip address 141.2.81.20 255.255.0.0

　　no ip directed-broadcast

　　ip route-cache policy

　　speed 100

　　full-duplex

　　!

　　interface Serial0/0

　　description Router 3 To Router 2

　　bandwidth 2048

　　ip address 218.141.2.2 255.255.255.0

　　no ip directed-broadcast

　　ip route-cache policy

　　no ip mroute-cache

　　service-policy output TO_MCU

　　!

　　access-list 100 permit ip host 141.2.20.20 host 129.2.20.34 precedence critical

　　access-list 101 permit ip host 129.2.20.34 host 141.2.20.20 precedence critical