hcnp12班qos部分乾颐堂qos04-0using mqc policy map

1、乾颐堂网络实验室QoS 服务质量了解Policy-mapModular QoS CLIObjectivesUpon completing this module, you will be able to: Describe the policy part of the Modular QoS CLIConfigure packet marking with the modular CLIConfigure policing and shaping with the modular CLIConfigure class-based WFQ with the modular CLIConfigur

2、e congestion avoidance mechanisms (WRED) with the modular CLIConfigure low-latency queuingMonitor and troubleshoot policy mapsService PolicyObjectivesUpon completing this lesson, you will be able to: Describe and configure policy mapsList all the QoS mechanisms currently available in the MQCMonitor

3、and troubleshoot policy mapsService PolicyOne aspect of MQC modularity is configuration.The MQC is split into two configuration modules,两大模块化:Configuration of classification-配置分类Configuration of service policies-配置策略Classification is configured by using class maps.Service policy is configured by usi

4、ng policy maps.Modular QoS CLIClassificationService PolicyClass 1?Class 2?Class N?CBWFQCBLLQClass-Based PolicingService policy implements per-hop behaviors (PHBs) for all traffic classes.Supported mechanisms:CBWFQCBLLQClass-Based PolicingClass-Based ShapingClass-Based MarkingUp to 256 classes can be

5、 used within one service policy一个policy-map中可以有256个class-mapPHB MechanismsThe MQC supports these QoS mechanisms:Class-based weighted fair queuing (CBWFQ) to guarantee bandwidth保证带宽Class-based low-latency queuing (CBLLQ) to guarantee bandwidth and low latency保证带宽和低时延Class-based policing to limit traf

6、fic rate by dropping excess traffic丢弃超过的流量Class-based shaping to limit traffic rate by delaying excess traffic通过延时超过的流量限制流量速率Class-based marking to mark packets标记报文Configuring Policy Mapspolicy-map nameRouter(config)#Enter policy-map configuration mode.Policy maps are identified by a case-sensitive

7、name.class class-mapRouter(config-pmap)#Enter the per-class policy configuration mode by using the name of a previously configured class map.Use the name “class-default” to configure the policy for the default class.class class-map conditionRouter(config-pmap)#Optionally, you can define a new class

8、map by entering the condition after the name of the new class map.The class map will use the match-any strategy.Configuring Policy Maps (cont.)description descriptionRouter(config-pmap)#It is mended to use descriptions in large and complex configurations. The description has no operational meaning.r

9、ename policy-mapRouter(config-pmap)#Complex policy maps can be renamed by using the rename policy-map command.All references to the policy map are also renamed.Router(config-pmap-c)#Per-class service policies are configured within the per-class policy map configuration mode.Configuring Policy Maps (

10、cont.)service-policy input | output policy-mapRouter(config-if)#Attaches the specified service policy map to the input or output interfaceThe interface should be in the default queuing mode prior to using this command if it is used on outputclass-map HTTP match protocol http!policy-map PM class HTTP

11、 bandwidth 2000 class class-default bandwidth 6000!interface Serial0/0 service-policy output PM!Attaching Policy Maps to Frame Relay Interfaces service-policy input | output policy-mapRouter(config-subif)#Service policy can be attached to an interface/subinterface.Service policy attached to a subint

12、erface cannot include CBWFQ or CBLLQ except in the distributed (VIP-based) version.policy-map中应用CB-WFQ和CBLLQ不能用于子接口Using service policies on the main interface and subinterfaces at the same time is not supported in the distributed (VIP-based) version.Attaching Policy Maps to Frame Relay PVCs service

13、-policy input | output policy-mapRouter(config-map-class)#Service policy can be attached to a Frame Relay map class.class-map Voice match protocol vofr!policy-map LLQ class Voice priority 100!interface Serial0/0 encapsulation frame-relay!interface Serial0/0.1 point-to-point frame-relay class Voice!m

14、ap-class frame-relay Voice service-policy output LLQ!Policy MapExampleclass-map match-all Test1 match protocol http match access-group 100class-map match-any Test2 match protocol http match access-group 101!policy-map Test class Test1 bandwidth 100 class Test2 bandwidth 200 class Test3 access-group

15、100 bandwidth 300!access-list 100 permit tcp any host access-list 101 permit tcp any host Monitoring and Troubleshooting Policy Mapsshow policy-map policy-mapRouter#Router#show policy-map Policy Map Test Class Test1 Weighted Fair Queueing Bandwidth 100 (kbps) Max Threshold 64 (packets) Class Test2 W

16、eighted Fair Queueing Bandwidth 200 (kbps) Max Threshold 64 (packets) Class Test3 Weighted Fair Queueing Bandwidth 300 (kbps) Max Threshold 64 (packets)Monitoring and Troubleshooting Policy Maps (cont.)show policy-map interface intf input | outputRouter#Router#show policy-map interface FastEthernet0

17、/0 output FastEthernet0/0 Service-policy output: Test (1101) Class-map: Test1 (match-all) (1103/3) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101 (1107) Match: access-group 102 (1111) Match: protocol http (1115) Weighted Fair Queueing Output Queue: Conversation 265 Bandwidth 100 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0 (depth/total drops/no-buffer drops) 0/0/0 . Class-map: class-default (match-any) (1143/0) 25 packets, 19310 bytes 5 minute offered rate 1000 bps, drop rate 0 bps Match: any (1147)SummaryU