Triple Play承载网络——ASB.ppt

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1、Triple Play承载网络,ASB IPDGu Wei,目前的运营模式 vs.新的业务模型,针对HSI而优化的BRAS,ATM/EthernetAggregation,DSLAM,AAA Server,BRAS,Internet,HSI 20-50 kb/s,Network dimensioning HSI x#users,1-3 Mb/s,ARPU,20$,50$,Packages(Mb/s,GB,minutes),HomeGateway,新业务的需求,从单一业务(HSI)到Triple Play(Voice/Video/Data),ENTERTAINMENT,COMMUNICATION

2、,VOD,TV Broadcast,Musicdownload,E-mail,chat,and instant message,Unified messaging,IP based Telephony,Video Communication,Gaming,相应的网络需求:,业务需求Always-on behaviour,meaning no service interuptsSteady image quality and clear toll-quality voiceFast channel browsing for Broadcast TV,Differentiation of Serv

3、ices,Accounting,BillingStrict Quality of Service:Delay,Jitter,BW,Packet LossService Availability and ReliabilityEffective Multicast modelScalability of servicesMore Security,Call for Service-Aware Metro Aggregation Solution for Triple Play,Alcatel对开展IPTV业务的承载网建议,DHCP模式-保证组播处理效率，并更适合IPTV业务终端模式多边缘模式-保

4、证业务边缘设备的业务扩展性,PPPoE 和DHCP对IPTV 组播效率和扩展性的影响,IP Edge7750 SR,Aggregation7450 ESS,Access7302 DSLAM,DHCP Server,IGMP Snoop/ProxyDHCP Relay:Add Option 82,IGMP Snoop/ProxyDHCP Snooping,IGMP,PIM SM/SSMDHCP Relay to DHCP ServerDHCP Snooping,我们建议的基于DHCP的IPTV组播模式,PPPoE 对IPTV 组播效率和扩展性的影响,业务边缘的冗余:DHCP/VRRP vs PP

5、PoE,7750 1,VMAC:A,vMAC:B,VMAC:C,VoIP 1,HSI 1,Video 1,BTV,.,7450,User 1,User N,VMAC:A,VMAC:B,VMAC:C,VoIP 2,HSI 2,Video 2,7750 2,Secure VPLSInfrastructure,VRRP,.,7450+7750,User 1,User N,Secure VPLSInfrastructure,HSI 2,HSI 1,BRAS 1,MAC:D,MAC:E,BRAS 2,PADI:DestMAC=Broadcast,PADO(BRAS 1),PADO(BRAS 2),PAD

6、I:DestMAC=E(BRAS 2 is first responder),DATA:DestMAC=VMAC C,Gratuitous ARP,7750 2 becomes Master,ARP blocked.7450 learns to reach MAC C on port HSI 2,实现针对不同用户的多业务:家庭用户：语音、高速上网、娱乐多媒体、在家办公商业用户：语音、高速上网、数据专线业务、VPN多条二层的链路到不同的IP边缘以承载不同的业务Ethernet VLAN或MPLS LSP不同的业务，采用不同的认证方式PPPoE：高速上网DHCP（option82）：Video，V

7、oIP,业务终端,多边缘（Multiple Edge）模式承载IPTVTriple Play 业务,BRAS,IP承载网,L2,DSLAM,视频/语音,CPE,互联网,业务路由器,业务交换机,DHCP,PPPoE,DHCP多边缘（Multiple Edge）模式是开展IPTV业务的方向,对于宽带的网络架构，BRAS厂商推动DSL Forum TR059 单边缘的网络结构模型，即所有用户端的业务类型都汇聚到BRAS上进行控制和区分，也可以做QOS和带宽shaping，以及统一的用户控制。但这种方法不适合 triple-play的业务开展，在DSLF WT101 对TR059架构进行了扩展，在BR

8、AS 之外用一个service router来处理新的业务模式。这些业务采用dhcp方式进行连接控制，DSL2004.071定义了dhcp option82，同时rfc3046也是对dhcp option82 的定义。另外Alcatel 和 FT 共同提出一个提案DSL2004.072定义 多业务多边缘的模型。Alcatel倡导多边缘的网络模型，即BRAS处理best effort 的Internet接入,用新的业务路由器（dhcp方式）处理video和voice。,多业务网络的三个关键,保证的服务质量Quality of Service Guarantee城域网络的可靠性Metro Netw

9、ork Reliability高效的组播模式Efficient Multicast Model,Alcatel对开展IPTV业务的承载网建议,为支持大规模部署IPTV业务优化汇聚网络MPLS Metro Ethernet（VPLS）延伸到城域汇聚网-实现实时业务所需的冗余保障能力，并支持灵活的网络拓扑，保证网络高可靠性在二层网络上分布实现基于用户的QOS和安全处理-解决大规模部署所需的网络扩展性，并为实时业务提供端到端的QOS和安全保证灵活的带宽扩展能力和优化的端口、带宽资源利用率,7450 performs per-sub queuing,accounting and policyenfor

10、cement allows QoS to scaleSecure Layer 2 forwarding model to 7750Multicast enabled(IGMP snooping,proxy).,7750 is the IP service edgeLayer 2 termination and IP unicast/multicast routingReduced queue and interface scaleQoS per-service and per-content,7450 and 7750 managed as a distributed node with VP

11、LS and Alcatel 5620 Service Aware Manager,Secure VPLSInfrastructure,Multicast,Multicast,Multicast,Multicast,BSA,BSA,BSR,7450 ESS,7450 ESS,7750 SR,IP/MPLS,Open Media Suite,5020 Softswitch,BSA,7450 ESS,7450 ESS,BSA,VRRP,Element Management,BRAS,Internet,7330 FTTN,7300 ASAM,7340 FTTU,7302 ISAM,L2 Aggreg

12、ation Network,L3 IP/MPLS Edge,Alcatel的Triple Play业务宽带网络架构,5750 SSC,Subscriber Services Control DHCP Server,用户汇聚容量示例（SBC）,BRAS for existing HSI customers,7750(L3 CO),VDSLModem,.,VDSLRemote,7450(L2 CO),PPPoEBRAS,VoIP PhoneVoD TVBroadcast TVHIS terminal,20-30 Remotes per 745012K HSI Sub.3K Video Sub.,4

13、00 HIS Sub.100 Video Sub.per VDSL Remote20 Mbps per Sub.,VPLS,10 GE Uplink per 7450,N x GE Uplink per Remote,5 L2 COs per 775060K HSI Sub.15K Vida Sub.,Total of around 900 CO.80%7450,20%7750.Migration Path:Keep existing HIS customers on BRAS while providing new multimedia services to new customers,接

14、入网中不同业务不用VLAN 区分（untagged）,BSR,业务流量连接模型,每业务1个VLAN（每BSA）,每业务独立分配IP地址,针对每用户的QoS 和计账。通过IGMP proxy支持二层组播。上行转发：基于MAC的转发。用户到用户的桥接备阻塞。下行转发：桥接到目标MAC。ARP广播被阻塞。,DSLModem,BTV,.,.,DSLRemote,BSA,IP:10.20.192/20MAC:A,IP:192.168.0/20MAC:B,IP:138.120.0/20MAC:C,电视广播进行组播复制上行转发：在GE上行口，不同用户流量从不同端口转发到不同VLAN。监控IGMP控制信息，并

15、转发到电视广播的VLAN。下行转发：不同用户流量从不同VLAN转发到不同端口。组播流桥接到具有IGMP snooping功能的用户端口。,L2终结和IP路由点。上下行转发通过IP路由。DHCP proxy点。不同业务采用不同的业务接口。每个业务接口可编程设定MAC，简化了在BSA上进行的业务隔离。支持单 IP 边缘和多 IP 边缘的架构。,每用户1个VLAN,IGMPProxy,BSR,高速互联网业务可以继续基于PPPoE方式,NxGE 接到 BAS。只有 PPPoE 流量才会被转发到BAS。,DSLModem,BTV,.,.,DSLRemote,BSA,IP:10.20.192/20MAC:

16、A,IP:192.168.0/20MAC:B,IP:138.120.0/20MAC:C,PPPoEBRAS,根据用户，根据业务进行计账，排队，执行PIR/CIR的策略和整形,IP:138.120.64/20MAC:D,PPPoE 流量隔离到独立的VLAN。没有 PPPoE 流量被转发到 BSR 做IP 路由。PPPoE 的 Ethertype 是 0 x8863 或 0 x8864,本地 VPLS 实例把PPPoE 流量交换到BAS。执行L2桥接。,VPLS,PPPoE,BSR 集成了L2交换和L3路由于一体，允许用单个接口（如10GE）接入所有业务，即使不同业务最终是接入不同的IP边缘设备。

17、,端到端的 QoS 模型,7302 DSLAM,CPE,IP/MPLSBackbone,Metro Eth,MPLS Enhanced Metro Ethernet networkMapping of VLANs to VPLS service instancesEnd-to-End QoS per serviceTraffic engineering and BW guarantees,7450 ESS/7750 SR,7450 provides per Subscriber QoS7750 provides per Forwarding Class QoS,1 VLAN per Sub.,

18、1 PVC per Sub.,7450,7750,Mark 802.1p bitsfor each traffic type,Remark p bits based onPVC or VLAN if CPE not trusted,Remark p bits based onL2 and L3 classification rulesif CPE not trusted,用户的QoS控制分布在L2汇聚网络上实施（7450）,业务类型在接入/汇聚网进行区分在接入/汇聚网对用户接入速率进行限速对于关键应用保证 CIR控制用 PIR 定义带宽共享策略和调度配置H-QoS 在分别独立地限制不用用户的接

19、入总带宽的同时，还可分别为每个用户的不同业务保留带宽，并支持各业务之间的带宽共享当总带宽限度内还有富余容量时，允许低优先级和“尽力而为”的业务流突发占满整个订购的总带宽（即高优先级业务流仅用了低于CIR的带宽）针对每个用户的QOS控制分布到7450上实现使每个7750能够汇聚60K用户！,PIR=20 MbpsCIR=4 Mbps,Subscriber VLANCIR=4.5M MbpsPIR=20 Mbps,VoIP(priority 1),PIR=20 MbpsCIR=200Kbps,PIR=20 MbpsCIR=90 Kbps,VOD(priority 2),HSI(shaped&pri

20、ority 3),GE,层次化的QoS实现用户间的等级控制,Gold SubscriberPIR=16 MbpsPriority Level 7,Multicast Video,Best Effort Data,Bronze SubscriberPIR=16 MbpsPriority Level 1,Multicast Video,Best Effort Data,总带宽PIR=16 Mbps,PIR=16 MbpsCIR=16 Mbps,PIR=16 MbpsCIR=0,PIR=16 MbpsCIR=16 Mbps,PIR=16 MbpsCIR=0,对上网内容区分，基于DSCP分类对金/银/

21、铜业务排队。可选的对总的上网速率的限制（H-QoS对HSI VLAN限速）,用户的QoS模型：下行流量,GE,VLANPerSub,VoIP,Video,HSI,DSLAM,GE,VoIP VLAN,Video VLAN,HSIVLAN,BRONZE,GOLD,ON-NET,BSA,BSR,上网业务，对每用户分别排队，执行PIR/CIR策略和整形。上网业务也可进一步按源IP地址范围进行分类对VoIP和Video，每业务分别优化，VoIP优先级高于Video。可按目标IP和/或 DSCP 分类。在接入网和家庭网可做 802.1p 优先标记,优先内容在城域网的可信的入口点进行DSCP 标记,VoI

22、P 和 Video 在每VLAN QoS策略的基础上进行排队和优先处理上网的内容区分基于DSCP。每队列可有独立的 CIR/PIR 和整形。可选的对总的上网速率的限制（H-QoS对HSI VLAN限速）,对每用户限速的高速上网每用户独立的 QoS 策略每业务独立的优先级/延迟/包丢失,每业务独立的优先级/延迟/包丢失对上网业务流进行内容优先区分,IP,用户的QoS模型：上行流量,GE,Realtime,VLANPerSub,DSLAM,BSR,BSA,GE,VoIP VLAN,Video VLAN,HSIVLAN,BRONZE,GOLD,ON-NET,VoIP/Video：共享实时业务的优先队

23、列。上行的视频数据很少，可忽略不计,上网业务：每用户独立排队，执行 PIR/CIR 策略和整形,对每用户作内容区分的QoS/内容分类,HSI,Video/VoIP：QoS 策略定义优先级和汇聚 CIR/PIR.上网业务：QoS 策略定义优先级和汇聚 CIR/PIR.。内容区分基于入口分类（DSCP标记）。,对每用户限速的高速上网每用户独立的 QoS 策略每业务独立的优先级/延迟/包丢失,每业务独立的优先级/延迟/包丢失对上网业务流进行内容优先区分,用户安全规则动态配置流程,DSLModem,BTV,.,.,DSLRemote,IP:10.20.192/20MAC:A,IP:192.168.0/

24、20MAC:B,IP:138.120.0/20MAC:C,DHCP Server,IP,BSR,BSA,DHCP Discover SMAC=userDMAC:Bcast,DstIP=0,SMAC=proxyDMAC/IP=server,DHCP Offer SMAC=proxyDMAC:user,DstIP=0,DHCP OfferSMAC/IP=serverDMAC/IP=proxy,DHCP Request SMAC=userDMAC:Bcast,DstIP=0,SMAC=proxyDMAC/IP=server,DHCP ACK SMAC=proxyDMAC:user,DstIP=0,D

25、HCP ACKSMAC/IP=serverDMAC/IP=proxy,Install antispoof filter per user,DHCP ACKSMAC/IP=proxyDMAC/IP=user,Install Static ARP Cache Entry in BSR(UserMAC/UserIP),DHCP OfferSMAC/IP=proxyDMAC/IP=user,Option 82,ARP reply:Gateway MAC=B,ARP with G/W IP address,用户安全控制分布在L2汇聚网络实施,DSLModem,BTV,.,.,DSLRemote,IP:1

26、0.20.192/20MAC:A,IP:192.168.0/20MAC:B,IP:138.120.0/20MAC:C,DHCP Server,IP,BSR,BSA,First Spoken SrcMAC,HOST,Pass PPPoE or DHCP Bcast,DHCP ACK(UserIP/MAC),Antispoof,No ARPs(DHCP-configured ARP table),Block User-user,ARP,Block ARP downstream,ARP,ICMP Redirect,ICMP redirect blocked,Valid SrcMAC/SrcIP,Da

27、ta,Invalid SrcMAC/SrcIP,物理网络拓扑-任意的冗余链路设计,Broadband service aggregation architecture must be able to optimize for transport and physical fiber topologyVPLS can work in both scenariosMeshavoid spanning tree and use 802.3ad for redundancy although uses more fiberRingH-VPLS provides sub-50 ms restoratio

28、n and bandwidth efficiency with better fiber efficiency,Open Media Suite,Physical Hub and Spoke,Physical Ring,IP,IP,Inter-Office Fiber,Open Media Suite,高效率的环形视频广播业务承载网络拓扑,无需生成树协议通过MPLS FRR实现小于50ms的故障恢复更高的带宽利用率,IP,BSA,BSA,BSA,BSA,BSR,BSR,Meshed VPLS,H-VPLS,在环形拓朴上采用层次化VPLS的好处:,Broadcast TV based on H-

29、VPLS Ring:Redundancy,H-VPLS Ring provides full redundancy,IP,7450,7450,7450,7450,7750 1,7750 2,IGMP Querier,PIM,PIM,Broadcast TV based on H-VPLS Ring:Redundancy,H-VPLS Ring provides full redundancy,IP,7450,7450,7450,7450,7750 1,7750 2,IGMP Querier,In case of inter-7450 link failure recovery is via M

30、PLS fast-rerouteSub 50ms recovery,In case of link failure to 7750,IGMP election process will cause 7750 2 to take over multicast2-3s recovery(IGMP timers),PIM,PIM,IGMP Querier,Broadcast TV based on H-VPLS Ring:Redundancy,IP,7450,7450,7450,7450,7750 1,7750 2,IGMP Querier,In case of inter-7450 link fa

31、ilure recovery is via MPLS fast-rerouteSub 50ms recovery,In case of link failure to 7750,IGMP election process will cause 7750 2 to take over multicast2-3s recovery(IGMP timers),In case of 7450 node failure,the ring is broken and both multicast routers become active2-3s recovery,PIM,PIM,IGMP Querier

32、,H-VPLS Ring provides full redundancy,城域网中VPLS方案 vs 传统二层交换机方案,可靠性和可用性扩展性业务 QoS流量工程维护效率业务镜像,传统以太交换机方案,基于 VPLS 的以太网方案,Fast Reroute,order of 50msecs,No LimitVLAN is local significant only,802.1 P-bit,P-bit,MPLS Label EXP-bit,H-QoS,None,RSVP-TE,SDP Keep Alive,Auto configExtensive service OA&M tools,(R)S

33、TP,order of seconds,4K VLANVLAN need to match globally,Manual configPing,TracerouteNo OA&M tools,None,DHCP 用户管理 DHCP based,MPLS-basedMetro Ethernet network,7750 SR,IP/MPLS backbone,7450,Internet,7750 SR,Broadcast TV,Video Server,7750 SR,7450,DSLAM,DHCP Server,RADIUS Server,1,6,2,3,5,4,DHCP-DISCOVER

34、from HostRADIUS REQUEST User=Mac Addr;Password(Option 60)RADIUS REPLY ACCEPT;QoS Policy;Filter Policy;Accounting Dynamically assign different QoS profiles to different subscribersDHCP RelayDHCP Server Assigns IPDHCP-ACKAccounting,Billing done through RADIUS Server,1,3,4,5,6,2,7750 SR,NGN,7,7,Referen

35、ces:7450/7750 for Metro Ethernet Aggregation,SBCUS$1.7 Billion Project to provide Triple Play services to US customers France TelecomBroadband aggregation for Triple Play services7450 in Metro,7750 in IP EdgeTeliasonera:Northern Europe Telecom Operator:Norway,Finland,Denmark,SwedenNew Metro Ethernet

36、 Network;DSL Network AggregationOver 200 7450(in Metro)and 7750(in IP Edge)Telenet:Belgian Cable OperatorResidential Triple Play;Business VPN ServicesAround 60 7750 SR(in Metro and IP Edge),References:7450/7750 for Metro Ethernet Aggregation,Ventelo:Nordic Telecom Operator:Norway,SwedenNordic teleco

37、m operator:Norway,Sweden7450(in Metro)and 7750(in IP Edge)to provide Triple Play servicesAnother US telecom provider in trialBroadband aggregation for Triple Play services7450 in Metro,7750 in IP Edge,项目情况阿尔卡特是“光速计划”项目的网络设备和服务的主供应商，合约总值达17亿美元 主要业务集成的IPTV，高速上网，IP话音等用户核心宽带业务阿尔卡特提供的设备和服务阿尔卡特 7330 IP DS

38、LAM，7750 业务路由器，7450 业务交换机，5620 SAM 智能业务管理系统视频服务集成商网络系统集成商重要数据到2007年底，SBC将覆盖一千八百万用户SBC 将部署 三万八千八百英里的光纤,项目概况：SBC 光速计划,Public information,SBC:SBC Communications Inc.是财富 50 强公司。其主要业务覆盖美国13个州，占国土的三分之一。在全国提供了五千四百万接入线。SBC 占60%股份的 Cingular 无线在36个州拥有两千五百万移动用户。SBC 提供的业务包括了本地和长途电话、DSL、无线、数据通信以及卫星电视。2005年1月，SBC

39、宣布将以160亿美元收购AT&T。,7450ESS,7750SR-12,SBC-IS,FTTP,FTTN,PON,BRAS,VideoDistribution Office,80%,20%,7340 OLT,VDSLRemote,L2 Serving Offices,L3 Serving Offices,7450ESS,7330 ISAM FTTN,7340 FTTU,SBC LightSpeed Network,BTV,IP:10.21.0/20MAC:A,IP Routing of DHCP-based servicesSwitching to existing BRAS for PPP,

40、IP:PUB.2.0/20MAC:C,Service Router,SBC Connectivity model,BTV,ServiceSwitch,PPPoE,PPPoE DATA,HomeG/W,BTV,VOD,VoIP,VLAN 10,VLAN 20,VLAN 100,GE,IP:PUB.1.0/20MAC:B,DHCP ServiceVoD/VoIP/Data,AccessNode,One PVC per subscriber,BTV VLAN carries all traffic for all sub/DSLAM,VLAN per subScaleable through VPL

41、S(in Metro),An European Incumbent Carrier,IP DSLAM,7450 ESS,VLAN N:1,VLAN 1:1,VLAN N:1TV Broadcast,NOTE:VLAN N:1 means N PVCs Into 1 VLANVLAN 1:1 means 1 PVC to 1 VLAN,PPPoE terminationIP pools,PPPoE terminationIP pools,VLAN N:1VoD Unicast,L2 Switching,L2 Switching,CPE,Internet accesswith dynamic IP

42、address,Internet accesswith permanent IPaddress,MMServices,MMServices,1 PVC ATMPPPoE,1 PVC ATM2684 bridged,1 PVC ATMPPPoE,1 PVC ATM2684 routed,1 PVC ATMPPPoE,1 PVC ATM2684 routed,IGMP2684R,VLAN N:1Data Unicast,L2 Switching,法国电信的业务开展模型,新的端到端业务模型,多PVC多边缘,Secure VPLSInfrastructure,Multicast,Multicast,M

43、ulticast,BSR,7750 SR,IP/MPLS,Video Content Servers,Softswitch,BSR=Broadband Service Router,BSA=Broadband Service Aggregator,Internet,xDSL/FTTx Access Nodes,7450 ESS,BSA,BSA,7450 ESS,7450 ESS,BSA,GigE,Session Border Controller,5620 SAM and 5750 SSCManaging Triple Play Infrastructure,Services and Subs

44、cribers,5750 SSC,5620 SAM,Subscriber Services Control,Network and Element Management,5750 SSC Network Role,NSP,CSP,ASP,BRAS,BSR(7750 SR),Home Network,Access Network,L2 Aggregation,IP Service Edge,Service Networks,RG,FTTxxDSL,5620SAM,5750 SSC,Accounting&Billing System,SLAdefinition,Network andService

45、Management,OSS/BSSSystems,NetworkLayer,Access Nodes,CPE,BSA(7450 ESS),OSS/ServiceManagement,NMS/EMS,Application andContent Servers,SubscriberPortal,revenuedata,serviceselection,QoS/AAAcontrol,DHCP/RADIUSnetwork policy control,proxy-AAA,external AAA domain server,Per-subscriber,per-service accounting

46、 queuing and policing/shaping/filtering.,IP:10.20.192/20MAC:A,IP:192.168.0/20MAC:B,IP:138.120.0/20MAC:C,IP:138.120.64/20MAC:D,VPLS,PPPoE,BSR,PPPoEBRAS,BSA,BTV,BTV:Broadcast TVMAC:Media Access Control,DHCP,RADIUS or Converged Mode of OperationIntegration of HSI PMO and dot1x/EAP in DHCP/Triple play,F

47、TTXAccessNode,RADIUSrequests,DHCP/option 82requests,BroadbandService Aggregator,7450 ESS,7750 SR,BroadbandService Router,BroadbandAccess Server,5750 SSC,5750 AAA,5750 DHCP,dynamic session policy configuration,5750 RCF,revenue data,“Fully loaded”5750 SSC configuration,Billing Interface,Web Portal,575

48、0 DHCPDHCPServiceController,5750 RCF Revenue Collector/Formatter,5750 SSCSubscriber ServicesController,5750 SSC-Product Suite Overview,EMS and Network Device Interfacing(Network Policy Control),ExternalDatabaseAccess,5750 AAARADIUS ServiceController,ExternalRADIUSServerAccess,ExternalDHCPServerAcces

49、s,RADIUS Client Access,DHCPClient Access,subscriberprofilesand subscriptions,ExternalLDAPServerAccess,serviceprofilesand policies,5750 SSC 用户和业务管理 GUI,Structured in directoriesOrganizations and domainsServices,profiles and cataloguesUser groups and profilesUsers,accounts and profilesContainment with

50、 inheritanceProfiles and attributes can be(re-)defined at various levelsAttributes values set for level n propagate to levels n-1 and lower unless redefined at the lower levelEfficient and preserves consistency,Services and scenarios enabled with 5750 SSC,Web-portal Self-ServiceDate/Time Service Pro