QOS學(xué)習(xí)資料PPT課件

廣域網(wǎng)邊界的帶寬配置模型 1 1 1 2004CiscoSystems Inc Allrightsreserved NMS 2T309681 05 2004 c2 需要多少個(gè)服務(wù)等級(jí) ExampleStrategyforExpandingtheNumberofClassesofServiceoverTime 4 5ClassModel Scavenger CriticalData CallSignaling BestEffort Realtime 根據(jù)廣域網(wǎng)帶寬的服務(wù)等級(jí)模型 Slowspeedlinks 768kbps Voiceorvideo notboth 3to5classmodelLFImechanismrequiredcRTPrecommendedMediumspeedlinks 768kbpsto T1 E1 Voiceorvideo notboth 5ClassmodelcRTPoptionalHighspeedlinks T1 E1 Voiceand orvideo 5to11Class QoSbaseline modelMultiplelinksrequirebundlingorload balancingVeryhigh speedlinks DS3 OC3 requirenewerCPUs 5級(jí)服務(wù)等級(jí)模型 Voice33 Call Signaling5 CriticalData36 BestEffort25 Scavenger1 Mediumspeedlinks 768kbpsto T1 E1 5級(jí)模型的配置案例 class mapmatch allVOICEmatchipdscpef IPPhonesmarkVoicetoEFclass mapmatch anyCALL SIGNALINGmatchipdscpcs3 FutureCall Signalingmarkingmatchipdscpaf31 CurrentCall Signalingmarkingclass mapmatch anyCRITICAL DATAmatchipdscpcs6 RoutersmarkRoutingtraffictoCS6matchipdscpaf21af22 RecommendedmarkingsforTransactional Datamatchipdscpcs2 RecommendedmarkingforNetworkManagementclass mapmatch allSCAVENGERmatchipdscpcs1 Scavengermarking policy mapWAN EDGEclassVOICEprioritypercent33 Voicegets33 ofLLQclassCALL SIGNALINGbandwidthpercent5 BWguaranteeforCall SignalingclassCRITICAL DATAbandwidthpercent36 CriticalDataclassgetsmin36 BWrandom detectdscp based EnablesDSCP WREDforCritical DataclassclassSCAVENGERbandwidthpercent1 Scavengerclassisthrottledclassclass defaultbandwidthpercent25 Defaultclassgetsa25 BWguaranteerandom detect EnablesWREDforclass default Voice18 BestEffort25 BulkData4 CriticalData27 CallSignaling5 Interactive Video15 NetworkControl5 8級(jí)服務(wù)等級(jí)模型 Highspeedlinks T1 E1 Scavenger1 8級(jí)模型的配置案例 Part1 class mapmatch allVOICEmatchipdscpef IPPhonesmarkVoicetoEFclass mapmatch allINTERACTIVE VIDEOmatchipdscpaf41af42 RecommendedmarkingsforIP VCclass mapmatch anyCALL SIGNALINGmatchipdscpcs3 FutureCall Signalingmarkingmatchipdscpaf31 CurrentCall Signalingmarkingclass mapmatch anyNETWORK CONTROLmatchipdscpcs6 RoutersmarkRoutingtraffictoCS6matchipdscpcs2 RecommendedmarkingforNetworkManagementclass mapmatch allCRITICAL DATAmatchipdscpaf21af22 RecommendedmarkingsforTransactional Dataclass mapmatch allBULK DATAmatchipdscpaf11af12 RecommendedmarkingsforBulk Dataclass mapmatch allSCAVENGERmatchipdscpcs1 Scavengermarking Dual T1LinkExample 8級(jí)模型的配置案例 Part2 policy mapWAN EDGEclassVOICEprioritypercent18 Voicegets552kbpsofLLQclassINTERACTIVE VIDEOprioritypercent15 384kbpsIP VCneeds460kbpsofLLQclassCALL SIGNALINGbandwidthpercent5 BWguaranteeforCall SignalingclassNETWORK CONTROLbandwidthpercent5 RoutingandNetworkManagementgetmin5 BWclassCRITICAL DATAbandwidthpercent27 CriticalDatagetsmin27 BWrandom detectdscp based EnablesDSCP WREDforCritical DataclassclassBULK DATAbandwidthpercent4 BulkDatagetsmin4 BWguaranteerandom detectdscp based EnablesDSCP WREDforBulk DataclassclassSCAVENGERbandwidthpercent1 Scavengerclassisthrottledclassclass defaultbandwidthpercent25 Fair queuingissacrificedforBWguaranteerandom detect EnablesWREDonclass default interfacemax reserved bandwidth100 Overridesthedefault75 BWlimitservice policyoutputWAN EDGE AttachestheMQCpolicytotheinterface Dual T1LinkExample WANEdgeBandwidthAllocationModelsQoSBaseline 11 Class WANEdgeModel Dual T1LinkExample Voice18 BestEffort25 Bulk4 Streaming Video10 Mission CriticalData10 CallSignaling5 InteractiveVideo15 Routing3 NetworkMgmt2 TransactionalData7 Scavenger1 class mapmatch allVOICEmatchipdscpef IPPhonesmarkVoicetoEFclass mapmatch allINTERACTIVE VIDEOmatchipdscpaf41af42 RecommendedmarkingsforIP VCclass mapmatch anyCALL SIGNALINGmatchipdscpcs3 FutureCall Signalingmarkingmatchipdscpaf31 CurrentCall Signalingmarkingclass mapmatch allROUTINGmatchipdscpcs6 RoutersmarkRoutingtraffictoCS6class mapmatch allNET MGMTmatchipdscpcs2 RecommendedmarkingforNetworkManagementclass mapmatch allMISSION CRITICAL DATAmatchipdscp25 InterimmarkingforMission CriticalDataclass mapmatch allTRANSACTIONAL DATAmatchipdscpaf21af22 RecommendedmarkingsforTransactional Dataclass mapmatch allBULK DATAmatchipdscpaf11af12 RecommendedmarkingsforBulk Dataclass mapmatch allSTREAMING VIDEOmatchipdscpcs4 RecommendedmarkingforStreaming Videoclass mapmatch allSCAVENGERmatchipdscpcs1 RecommendedmarkingforScavengertraffic WANEdgeBandwidthAllocationModelsQoSBaselineModelConfigurationExample Part1 Dual T1LinkExample policy mapWAN EDGEclassVOICEprioritypercent18 Voicegets552kbpsofLLQclassINTERACTIVE VIDEOprioritypercent15 384kbpsIP VCneeds460kbpsofLLQclassCALL SIGNALINGbandwidthpercent5 BWguaranteeforCall SignalingclassROUTINGbandwidthpercent3 RoutingclassgetsexplicitBWguaranteeclassNET MGMTbandwidthpercent2 Net MgmtclassgetsexplicitBWguaranteeclassMISSION CRITICAL DATAbandwidthpercent10 Mission Criticalclassgets10 BWguaranteerandom detect EnablesWREDforMission CriticalDataclassclassTRANSACTIONAL DATAbandwidthpercent7 Transactional Dataclassgets7 BWguaranteerandom detectdscp based EnablesDSCP WREDforTransactional DataclassclassBULK DATAbandwidthpercent4 BulkDataremainsat4 BWguaranteerandom detectdscp based EnablesDSCP WREDforBulk DataclassclassSTREAMING VIDEObandwidthpercent10 Streaming Videoclassgets10 BWguaranteeclassSCAVENGERbandwidthpercent1 Scavengerclassisthrottledclassclass defaultbandwidthpercent25 Class Defaultgets25 minBWguaranteerandom detect EnablesWREDonclass default WANEdgeBandwidthAllocationModelsQoSBaselineModelConfigurationExample Part2 Dual T1LinkExample WANEdgeBandwidthAllocationModelsDistributed Platform Single SourceQoSQoSBaselineModelConfigurationExample policy mapWAN EDGEclassVOICEprioritypercent18 Voicegets552kbpsofLLQclassINTERACTIVE VIDEOprioritypercent15 384kbpsIP VCneeds460kbpsofLLQclassCALL SIGNALINGbandwidthpercent5 BandwidthguaranteeforCall SignalingclassROUTINGbandwidthpercent3 BandwidthguaranteeforRoutingclassNET MGMTbandwidthpercent2 BandwidthguaranteeforNetworkManagementclassMISSION CRITICAL DATAbandwidthpercent10 Mission Criticaldatagetsmin10 BWguaranteefair queue AppliesFQtoMission CriticalDataclassrandom detect EnablesWREDonMission CriticalDataclassclassTRANSACTIONAL DATAbandwidthpercent7 TransactionalDatagetsmin7 BWguaranteefair queue AppliesFQtoTransactionalDataclassrandom detectdscp based EnablesDSCP WREDonTransactionalDataclassclassBULK DATAbandwidthpercent4 BulkDatagetsmin4 BWguaranteefair queue AppliesFQtoBulkDataclassrandom detectdscp based EnablesDSCP WREDonBulkDataclassclassSTREAMING VIDEObandwidthpercent10 Streaming Videogetsmin10 BWguaranteeclassSCAVENGERbandwidthpercent1 Scavengerclassisthrottledclassclass defaultbandwidthpercent25 Class Defaultgetsmin25 BWguaranteefair queue AppliesFQtoClass Defaultrandom detect EnablesWREDonClass Default Dual T1LinkExample QoS標(biāo)記分配 13 13 13 2004CiscoSystems Inc Allrightsreserved NMS 2T309681 05 2004 c2 ClassificationandMarkingQoSBaseline AITMarkingRecommendations 分類技術(shù)Classify 在核心交換機(jī)上實(shí)施QoS標(biāo)記使用DSCP模型EF 語音AF31 業(yè)務(wù)AF21 OABestEffect 其他AF41 留作擴(kuò)展例如Video setqosenable 語音業(yè)務(wù)vlan出來setqosaclipSETDSCPdscp46ipxxx 0 12 00 0 0 255xxx 0 0 00 255 255 255 柜面服務(wù)器 前置機(jī)到轄內(nèi)網(wǎng)絡(luò) 信貸管理 票據(jù)業(yè)務(wù)setqosaclipSETDSCPdscp26tcpOLTP服務(wù)器地址 NotessetqosaclipSETDSCPdscp18ipxxx 0 14 320 0 0 15xxx 0 0 00 255 255 255commitqosaclall 在除下聯(lián)路由器vlan外所有vlan上啟用qos策略setqosaclmapSETDSCP200 210 220 500 案例CatOS mlsqos 語音視頻業(yè)務(wù)vlan出來ipaccess listextendedRealtimepermitipxxx 0 12 00 0 0 255any定義交互業(yè)務(wù)應(yīng)用ipaccess listextendedInteractivepermittcphost OLTP服務(wù)器地址 any定義OA業(yè)務(wù) Notesipaccess listextendedNotes XNpermitipxxx 0 14 320 0 0 15anyclass mapmatch allEF 定義EF類matchaccess groupnameRealtime 實(shí)時(shí)業(yè)務(wù)class mapmatch allAF41 定義AF31類matchaccess groupnameInteractive 交互業(yè)務(wù) 案例nativeIOS policy mapSETDSCP 定義策略映射classEF EF類setipdscp46 設(shè)置DSCP值為46classAF31 AF31類setipdscp26 設(shè)置DSCP值為26classAF21 AF21類setipdscp18 設(shè)置DSCP值為18classclass default 其它類setipdscp0 設(shè)置DSCP值為0intrangefastethernet3 1 48service policyoutputSETDSCP 案例nativeIOS QOSDESIGN 19 19 19 2004CiscoSystems Inc Allrightsreserved NMS 2T309681 05 2004 c2 廣域網(wǎng)邊緣QoS部署的總體設(shè)計(jì) WANAggregator 建議Cat4500 Sup3以上Cat6500 Sup2以上Cat3550 WAN Queuing LLQ PQVoiceClassShaping 交易數(shù)據(jù)ClassPolicies 普通數(shù)據(jù)ClassWRED DefaultClass 標(biāo)記分類 Shaping 交易數(shù)據(jù)Policies 一般數(shù)據(jù) WANSchedulingToolsLLQ CBWFQAlgorithm CBWFQ Fragment Interleave WFQ LinkFragmentationandInterleave LowLatencyQueueing PacketsOut PacketsIn Police VoIP IP VC PQ Layer3QueueingSubsystem Layer2QueueingSubsystem Signaling Critical Bulk Mgmt Default TXRing 隊(duì)列Queue技術(shù)的使用 TheonlywaytoprovideserviceGUARANTEESistoenablequeuingatanynodethathasthepotentialforcongestionRegardlessofhowrarely infact thismayoccur保留最少25 帶寬作為defaultBestEffortclass使用限制優(yōu)先隊(duì)列strict priorityqueuingto33 鏈路帶寬根據(jù)平臺(tái)的能力 在Campus WAN實(shí)時(shí)流量的Policing配置WRED 在所有可能的網(wǎng)絡(luò)節(jié)點(diǎn)PreferablyDSCP basedWRED policy mapQOS 定義策略映射classRealtime 實(shí)時(shí)業(yè)務(wù)類priority500 定義為優(yōu)先級(jí)隊(duì)列 帶寬使用500KbpsclassInteractive 交互業(yè)務(wù)類bandwidth500 使用500KbpsclassOA OA業(yè)務(wù)類bandwidth500 使用500Krandom detectdscp based 根據(jù)DSCP值 進(jìn)行隨機(jī)丟棄classcalss default 其他業(yè)務(wù)類fair queue 實(shí)施WFQrandom detectdscp based 根據(jù)DSCP