Transcription

WAN & Branch QoS DesignBRKRST-2501

WAN & Branch QoS DesignAgenda Business and Technical Drivers for QoS Design Updates WAN & Branch QoS Design MPLS VPN Subscriber QoS DesignBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public2

Business and Technical Drivers forQoS Design Updates

Why WAN QoS Designs Need UpdatingBusiness and Technical Drivers New Business and Application RequirementsExplosion of Video AppsImpact of HDBlurring of Voice/Video/Data application boundaries New Standards and RFCsRFC 4594 New Platforms and TechnologiesNew Routing Platforms and Software Enterprise/WAN and MAN/QoS SRND 40/QoSIntro 40.htmlBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public4

New Business RequirementsCisco Visual Networking Index Findings Global IP traffic will quadruple from 2009 to 2014. Global Internet video traffic will surpass global peer-to-peer (P2P) traffic by the end of 2010. Forthe first time since 2000, P2P traffic will not be the largest Internet traffic type. The global online video community will surpass 1 billion users by the end of 2010. Internet video is now over one-third of all consumer Internet traffic, and will approach 40 percentof consumer Internet traffic by the end of 2010, not including the amount of video exchanged throughP2P file sharing. The sum of all forms of video (TV, video on demand, Internet, and P2P) will exceed 91 percentof global consumer traffic by 2014 Advanced Internet video (3D and HD) will increase 23-fold between 2009 and 2014. By 2014, 3Dand HD Internet video will comprise 46 percent of consumer Internet video traffic. Video communications traffic growth is accelerating. Video communications traffic will increasesevenfold from 2009 to 2014. Real-time video is growing in importance. By 2014, Internet TV will be over 8 percent of consumerInternet traffic, and ambient video will be an additional 5 percent of consumer Internet traffic. Video-on-demand (VoD) traffic will double every two and a half years through 2014. ConsumerIPTV and CATV traffic will grow at a 33 percent CAGR between 2009 and al/ns341/ns525/ns537/ns705/ns827/white paper c11-481360.htmlBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public5

New Application RequirementsThe Impact of HD on the Network5Mbps43Min2Max10(H.323) DVD(H.264) 720p(H.264) 1080p User demand for HD video has a major impact on the network(H.264) 720p HD video requires twice as much bandwidth as (H.323) DVD(H.264) 1080p HD video requires twice as much bandwidth as (H.264) rprise/Video/tpover.html#wp1043660BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public6

New Application RequirementsStringent Tolerances of HD Media Applications1080 lines of Horizontal Resolution1920 lines of Vertical Resolution (Widescreen Aspect Ratio is 16:9)1080 x 1920 lines 2,073,600 pixels per framex 3 colors per pixelx 1 Byte (8 bits) per colorx 30 frames per second 1,492,992,000 bpsor 1.5 Gbps UncompressedCisco H.264-based HD Codecs transmit 3-5 Mbps per 1080p imagewhich represents over 99.67% compression (300:1)Therefore packet loss is proportionally magnified in overall video qualityUsers can notice a single packet lost in 10,000—Making HD VideoOne Hundred Times More Sensitive to Packet Loss than erprise/Video/tpqos.html#wp1047856BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public7

New Applications RequirementsVoIP vs. HD Video—At the Packet LevelVoice Packets140014001000Video udioSamples60020020020 msecTime33 rprise/WAN and MAN/QoS SRND 40/QoSIntro 40.html#wp60774BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public8

New Application RequirementsTrends in Voice, Video and Data Media ApplicationsVideoVoiceWebEmailMessagingDataApps App Sharing Web/Internet Messaging EmailDataApps App Sharing Web/Internet Messaging EmailWebExVoice IP Telephony HD Audio Softphone Other VoIP IP TelephonyTelePresenceVideo IP Video Conf Surveillance Video Telephony HD Video Conf VoD Streaming IP Video ConfAd-Hoc App Internet Streaming Internet VoIPUnmanaged YouTube MySpace erprise/WAN and MAN/QoS SRND 40/QoSIntro 40.html#wp60798BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public9

New Standards and RFCsCisco Medianet DiffServ QoS Recommendations(RFC 4594-Based)ApplicationPer-HopAdmissionQueuing IP TelephonyEFRequiredPriority Queue (PQ)Cisco IP Phones (G.711, G.729)Broadcast VideoCS5Required(Optional) PQCisco IP Video Surveillance / Cisco EnterpriseTVRealtime InteractiveCS4Required(Optional) PQCisco TelePresenceMultimedia ConferencingAF4RequiredBW Queue DSCP WREDCisco Unified Personal Communicator, WebExMultimedia StreamingAF3RecommendedBW Queue DSCP WREDCisco Digital Media System (VoDs)Network ControlCS6BW QueueEIGRP, OSPF, BGP, HSRP, IKECall-SignalingCS3BW QueueSCCP, SIP, H.323Ops / Admin / Mgmt (OAM)CS2BW QueueSNMP, SSH, SyslogTransactional DataAF2BW Queue DSCP WREDERP Apps, CRM Apps, Database AppsBulk DataAF1BW Queue DSCP WREDE-mail, FTP, Backup Apps, Content DistributionBest EffortDFDefault Queue REDDefault ClassScavengerCS1Min BW Queue (Deferential)YouTube, iTunes, BitTorent, Xbox rprise/WAN and MAN/QoS SRND 40/QoSIntro 40.html#wp61104BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public10

New Standards and RFCsRFC 2597 Clarification: Endpoints can Mark at AFx2 and AFx3Application ClassPHB MarkingAdmission ControlPHB Queuing & DroppingApplication ExamplesVoIP TelephonyEFRequiredPriority Queue (PQ)Cisco IP PhonesBroadcast VideoCS5Required(Optional) PQCisco IPVS / Enterprise TVRealtime InteractiveCS4Required(Optional) PQCisco DBERG EX / MXPRequiredBW Queue DSCP WREDCUPC / TANDBERG MoviAF43Cisco WebExAF3Cisco CastAF32RecommendedBW Queue DSCP WREDAF33Cisco Show-and-ShareCisco Digital SignsNetwork ControlCS6BW QueueEIGRP, OSPF, BGP, IKECall-SignalingCS3BW QueueSCCP, SIP, H.323OAMCS2BW QueueSNMP, SSH, SyslogAF21Transactional DataAF22Order Processing AppsBW Queue DSCP WREDAF23AF11Bulk DataAF12CRM / ERP AppsMessaging AppsEmailBW Queue DSCP WREDAF13FTPBackupsBest EffortDFDefault Queue REDDefault ClassScavengerCS1Min BW QueueYouTube, iTunes, BitTorentBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public11

New Platforms and TechnologiesNew Routing Platforms and Software FeaturesISR G2HQFASRSIP/SPABRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco PublicIntServ/DiffServIntegration12

WAN & Branch QoS DesignAgenda Business and Technical Drivers for QoS Design Updates WAN & Branch QoS Design MPLS VPN Subscriber QoS DesignBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public13

WAN & Branch QoS Design—Considerations & Design Recommendations

WAN QoS DesignConsiderations & Design Medianet WAN & Branch Router Platforms WAN Link Media & Speeds QoS Mechanisms & Operations Control Plane Policing Medianet WAN Interface Roles (DiffServ) WAN QoS Design (4-Class, 8-Class & 12-Class Models) Link-Specific WAN QoS Design (Leased-Line, ATM PVC, POS) Platform-Specific WAN QoS Design RSVP Overlay WAN QoS terprise/WAN and MAN/QoS SRND 40/QoSWAN 40.htmlBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public15

WAN QoS ConsiderationsMedianet WAN & Branch RoutersCampus ACampus BWANAggregationRoutersPrivate WANMPLS VPNWANServicesBlockCoreDistributionAccessMetro EthernetIPSec VPNBranchRoutersBranch BMedianet WAN Aggregation Routers: Cisco ASR 1000 Cisco 6500/7600 with SIP/SPABranch AMedianet Branch Routers: Cisco ISR G2 3900 Cisco ISR G2 rprise/WAN and MAN/QoS SRND 40/QoSWAN 40.htmlBRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public16

WAN QoS ConsiderationsMedianet WAN Aggregation Routing Platform CapacitiesWAN Aggregation Router PlatformPerformance CapacityCisco Catalyst 6500 / 7600 with SIP-2001 GbpsCisco Catalyst 6500 / 7600 with SIP-4004 GbpsCisco Catalyst 6500 / 7600 with SIP-60010 GbpsCisco ASR 1002 with ESP 2.5, ESP5, or ESP102.5 Gbps, 5 Gbps or 10 Gbps, respectivelyCisco ASR 1004 with ESP10 or ESP2010 Gbps or 20 Gbps, ons/Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129370BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public17

Branch QoS ConsiderationsMedianet Branch Routing Platform CapacitiesBRKRST-2501Branch RouterPlatformPerformance CapacityCisco 3945ESub-rate GE (350Mbps)Cisco 3925ESub-rate GE (250Mbps)Cisco 3945Line-rate FE (150Mbps)Cisco 3925Line-rate FE (100Mbps)Cisco 2951VDSL2 , Sub-rate FE (75Mbps)Cisco 2921VDSL2 , Sub-rate FE (50Mbps)Cisco 2911VDSL2 , Sub-rate FE (35Mbps)Cisco 29011T1/E1, EFM (25Mbps) 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public18

WAN QoS ConsiderationsMedianet WAN/VPN Link Media and SpeedsMediaLine Rates / SpeedsSerialT3 (45 Mbps)ATMDS3 (45 Mbps) to OC48/STM16 (2.5 Gbps)POSOC3/STM1 (155 Mbps) to OC192/STM64 (10 Gbps)Ethernet10 Mbps to 10 rprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129483BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public19

WAN QoS Mechanisms and OperationTx-Ring OperationIOS Interface BuffersPacketsIninterface Serial2/0tx-ring-limit 4Tx-RingPacketsOutIf the Tx-Ring is filled to capacity,then the IOS software knows that the interfaceis congested and it should activate anyLLQ/CBWFQ policies that have beenapplied to the /Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129403BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public20

WAN QoS Mechanisms and OperationFair-Queuing Operation (Flow-Based Fair-Queuing)Packets Inpolicy-map FQclass erPackets OutA flow is defined by five matching tuples:Source Address Source PortDestination Address Destination PortLayer 4 Protocol (TCP or rprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129419BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public21

WAN QoS Mechanisms and OperationCBWFQ OperationIOS Interface BuffersNetwork Control CBWFQCall Signaling CBWFQOAM CBWFQFQPacketsInMultimedia Conferencing CBWFQpolicy-map CBWFQclass NETWORK-CONTROLbandwidth percent 5class CALL-SIGNALINGbandwidth percent 5class OAMbandwidth percent 5class MM-CONFERENCINGbandwidth percent 10fair-queue Tx-RingFQMultimedia Streaming CBWFQFQTransactional Data CBWFQCBWFQSchedulerPacketsOutFQBulk Data CBWFQFQFQBest Effort / Default CBWFQPre-SortersScavenger CBWFQBRKRST-2501Cisco Public 2011 Cisco and/or its affiliates. All rights /Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp12941922

WAN QoS Mechanisms and Operation(Single) LLQ OperationIOS Interface Buffers1 MbpsVoIPPolicerpolicy-map LLQclass VOIPpriority 1000 ns/Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129443BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public23

WAN QoS Mechanisms and OperationMulti-LLQ OperationIOS Interface Bufferspolicy-map MULTI-LLQclass VOIPpriority 1000class BROADCAST-VIDEOpriority 4000class REALTIME-INTERACTIVEpriority 5000 1 MbpsVoIPPolicer4 MbpsBscst-VideoPolicerLLQ5 s/solutions/Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129469BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public24

WAN QoS Mechanisms and OperationDSCP-Based WRED OperationTailofQueueBulk Data CBWFQpolicy-map BULK-WREDclass BULKbandwidth percent 10random-detect fPacketFlowAF13 Minimum WRED Threshold:Begin randomly dropping AF13 PacketsAF12 Minimum WRED Threshold:Begin randomly dropping AF12 PacketsAF11 Minimum WRED Threshold:Begin randomly dropping AF11 PacketsMaximum WRED Thresholds for AF11, AF12 and AF13 are set to the tail of the queue in this nterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129476BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public25

Branch QoS ConsiderationsAutoQoS Considerations Two versions of AutoQoS in the WAN:AutoQoS—VoIP (2001)AutoQoS—Enterprise (2005) AutoQoS—Enterprise automaticallydetects and provisions up to 10application classes Some markings and classes differ fromCisco Medianet QoS Model (slide 10) Policies will vary according to trafficprofiles sampled1) Discovery Mode:interface Serial2/0auto discovery qos2) Configuration Mode:interface Serial2/0auto qosAutoQoS—EnterpriseTraffic ClassDSCPIP RoutingCS6Interactive VoiceEFInteractive VideoAF41Streaming VideoCS4Telephony SignalingCS3Transactional/InteractiveAF21Network ManagementCS2Bulk DataAF11Best /solutions/Enterprise/WAN and MAN/QoS SRND 40/QoSWAN 40.html#wp129625BRKRST-2501 2011 Cisco and/or its affiliates. All rights reserved.Cisco Public26 page