2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID1运营商级以太网运营商级以太网CarrierEthernet陈南，陈南，nanchencisco.com思科系统思科系统(中国中国)有限公司有限公司 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID2http:/www.docin.com/webmoneyCarrier Ethernet的历史发展 The History & DriversCarrier Ethernet的应用架构 The ArchitectureCarrier Ethernet的相关技术 The TechnologiesCarrier Ethernet的部署路线 The Deployment RoadmapCarrier Ethernet的应用案例 The Case Study 总结议程议程 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID3http:/www.docin.com/webmoneyCarrierEthernet的历史发展的历史发展 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID4http:/www.docin.com/webmoneyMEF对对CarrierEthernet的定义的定义www.metroethernetforum.org 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID5http:/www.docin.com/webmoneyAT&T的整体企业客户网络架构的整体企业客户网络架构Inter/IntraLATAandGlobalEnterpriseServicesAT&TGlobalConceptofOneIP/MPLSBackbone美国本土美国本土LATA-1美国本土美国本土LATA-2客户客户1站点站点A客户客户1站点站点B客户客户1站点站点E全球全球AGNFrameRelay/ATM客户客户1站点站点D客户客户1站点站点CLayer2:OPT-E-MANLayer3:AVPN/DIA(FTTB以太网接入以太网接入)Layer3:AVPN/DIA(FTTB以太网接入以太网接入+OPT-E-MAN接入接入)Layer3:AVPN(FrameRelay/ATM接入接入)InternetDIARouterDIARouterDIARouterAVPNPEAVPNPEAVPNPEIntra-LATA QoS Domain4 Class of ServicesLayer2 Metro Ethernet Service (E-Line, E-LAN) QoS DomainIntra-LATA Layer3 VPNIntra-LATA QoS Domain4 Class of ServicesLayer2 Metro Ethernet Service (E-Line, E-LAN) QoS DomainIntra-LATA Layer3 VPNInter-LATA and Global Backbone QoS DomainLayer3 IP/MPLS QoS, 4 Class of ServicesGlobal Layer3 VPN and DIA ServicesInter-LATA and Global Access QoS DomainLayer2 QoS, 4 Class of ServicesEthernet/OPT-E-MAN AccessInter-LATA and Global Access QoS DomainLayer2 QoS, 4 Class of ServicesEthernet/OPT-E-MAN Access管理域跨域点：接入域到骨干域，没有管理域跨域点：接入域到骨干域，没有Inter-AS跨域跨域VPNQoS域跨域点：域跨域点：Layer2EthernetToStoLayer3DSCP/EXPE2ESLA保障保障E2EManagedServiceDomain客户客户1站点站点FAVPNPEIPSecTunnel 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID6http:/www.docin.com/webmoneyIP/MPLS domain.76097609DSLAMsDSLAMs1-48Ethernet, MPLS &IP AccessGE10GExWDMFEEDERLEVEL70SGUOPBPOPBRAS,PE,RAVoDServerOPBPOPOPBPOPTVBroadcastVideoonDemandBusinessVPNResidentialInternetCity61760976097609METROLEVEL32COREPOPsGEGEGE760910GECity1Residential70%Business10%Wholesale20%GE意大利电信意大利电信城域以太网网络架构城域以太网网络架构 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID7http:/www.docin.com/webmoney移动运营商中移动运营商中CE架构的应用架构的应用ConvergedIP/CEInfrastructurewithCEoPIP-BASEDSOLUTIONSTOOPTIMIZEGSM/UMTSRANTRANSPORTARCHITECTURES50%+measuredeffgainonGSMandUMTSNochangetoRANbackhauldesignSingleIPbackhaulnetworkserves2G/3G/4GRANbackhauloveranynetworkOffloadbandwidthhungryHSPAandUMTSdataSimplenetworkexpansionIntelligentcellsiteIPenablesnewrevenuegeneratingservicesRemotecellsitemanagementandLANextensionSeamlessexpansionto4GBackhaulTransportOptimizationoverIPBroadbandBackhaulandHSDPAOffloadCellSiteIPPOPsUnifiedRANNetworkCEoPBackhaulEthernet4GGSM/GPRS/EDGET1/E1UMTS/HSDPAUMTS/HSPACarrierEthernetT1/E1OC3/STM1EthernetT1/E1EthernetCarrierEthernetIP 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID8http:/www.docin.com/webmoneyCarrierEthernet的历史发展的历史发展小结小结无论是提供城域内的基于Ethernet UNI的L2/L3 VPN业务还是对宽带的ATM汇聚的替代还是对ATM/FR的传统业务的替代以及未来移动网络应用与FMC应用Metro Carrier Ethernet都扮演着越来越重要的角色随着网络进一步融合，Metro Carrier Ethernet将越来越发挥出在各个方面的优势：灵活的业务承载和传送较低的成本极高的带宽越来越完善的服务品质 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID9http:/www.docin.com/webmoneyCarrierEthernet的应用架构的应用架构 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID10http:/www.docin.com/webmoneyCarrierEthernet的典型应用的典型应用宽带业务汇聚 (Broadband Aggregation)DSLAM, Wi-Fi, PON/FTTH, EthernetHigh Bandwidth, Multicast, IPTV Delivery以太网接入 (Ethernet Access)Ethernet UNI AccessLower Cost, Higher and Flexible Bandwidth, VLAN/Service Multiplexing以太网传输 (Ethernet Transport)Wireless Base Station Backhaul, Data Center Storage/DRLower Cost, Higher Bandwidth以太网汇聚 (Ethernet Aggregation)Broadband Ethernet AggregationBusiness Ethernet AggregationWireless Ethernet Aggregation 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID11http:/www.docin.com/webmoney本地网的业务与网络定位本地网的业务与网络定位传统本地网的定位与不足传统本地网的定位与不足传统本地网的功能客户接入将客户连接进入业务宿主网络本地业务完成本地业务的交换和本地通信到骨干网的衔接通过网关连接到骨干网可以满足Internet访问业务的要求，但不能满足新业务的要求和已经面临的挑战简单的接入和管道式的业务模式缺少价值附加值，业务能力有限全开放的网络架构没有形成对OTT运营商/移动运营商的竞争优势面向多张骨干网的衔接不能平滑，网络对接复杂接入网络接入网络业务宿主网络业务宿主网络业务宿主网络业务宿主网络接入网络接入网络 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID12http:/www.docin.com/webmoneyIPNGN中本地网的定位中本地网的定位综合接入与业务智能提供综合接入与业务智能提供高带宽的综合接入真正的宽带接入，为更多的应用创造基础条件接入实现多业务的复用，适应各种应用环境的多种接入技术的集成分级的网络架构通过分级的架构建立有利于运营商自身的接入资源控制机制差分低价值低服务品质的开放互联网与高价值高服务品质的本地业务网络业务智能的控制通过更加智能的边缘IP设备实现精细化基于策略的增值业务的开发和部署互联网互联网Internet/OTT接入网络接入网络本地业务宿主网络本地业务宿主网络IPTV, Local Voice, VAS长途业务宿主网络长途业务宿主网络Long-haul Voice/Transport/本地网本地网骨干网骨干网Layer1/2/3Layer2/3Layer3Layer2/3“智能”“智能”Metro Carrier Ethernet 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID13http:/www.docin.com/webmoneyIP (FE/GE/10GE/POS)本地网与骨干网的互联本地网与骨干网的互联整体架构整体架构(模块逻辑图模块逻辑图)商务客户商务客户个人客户个人客户个人客户MetroCarrierEthernetLayerNative Ethernet, IP/MPLS, EoMPLS, VPLS, H-VPLS, E-OAM, Multicast Routing(Layer2 & Layer3)Legacy (FR, CPoS, ATM.)Ethernet (FE/GE/10GE)China169骨干网骨干网A/C/I/S Router(Layer3)IP (POS/10GE)Ethernet/IP (GE/10GE)接入技术接入技术(DSL, Ethernet, PON, Dark Fiber, FR, ATM, Wireless, GSM/3G)Layer1 & Layer2)CNCNet/NGN承载网承载网PE/P Router(Layer2/3)Ethernet/IP (GE/10GE)Ethernet/IP (GE/10GE)本地网本地网骨干网骨干网IP本地网本地网BRAS, SR, MAN Aggregation/Core Router(Layer2 & Layer3)本地网业务中心本地网业务中心(IPTV, Local Voice, 自主Portal, Hosted Service, 大客户服务中心)Ethernet/IP(GE/10GE) 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID14http:/www.docin.com/webmoney本地网与骨干网的互联本地网与骨干网的互联整体架构整体架构(网络拓扑图网络拓扑图)DSLAMLAN2G/3GDSLAMLANWiFiU-PEU-PEN-PEN-PEU-PEU-PEU-PEU-PEBRASBRASBRASSRCRCRDSLAMLANWiFiU-PEN-PEU-PEU-PEIPTVHELocal VoiceBBVASVIPVASL3VPNChina169骨干网骨干网A/C/I/S Router(Layer3)CNCNet/NGN承载网承载网PE/P Router(Layer2/3)IP本地网本地网MetroCarrierEthernet本地接入网本地接入网IP/BGPLinkIP/VPNLinkIP/EthernetLayer2LinkEthernetLayer2LinkEthernetLayer2LinkEthernetLayer2LinkEthernetLink(L2/L3)IP/PPPoEEthernetLink(L2)本地网业务中心本地网业务中心 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID15http:/www.docin.com/webmoney对对CarrierEthernet的典型问题之一的典型问题之一是否真的需要是否真的需要CE这一层？为什么不直连？这一层？为什么不直连？随着网络向IP融合的角度不断前进，接入单元将越来越多元化，也将越来越散布DSLAM, PON, Ethernet Switch, IAD, AG, Wi-Fi AP, 2G/3G/PHS Base Station没有Carrier Ethernet，这些接入单元的回传(Backhaul)如何高效率的解决？单一接入单元的同一接入线路上承载的业务趋于多元化Broadband Triple Play, DIA, VPN, Tiered Services没有Carrier Ethernet，这些业务的复用和分流如何高效率的实现？网络智能边缘设备的种类趋于增加BRAS, VPN PE, IPTV SR, NGN/Voice PE, 3G PE如何最大效率的连接用户的业务数据和这些业务设备？ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID16http:/www.docin.com/webmoney本地网与骨干网的互联本地网与骨干网的互联整体架构整体架构1.商务客户的接入以Ethernet为主，逐步替代原有的FR/ATM的接入方式2.接入带宽应可以无缝升级，按业务复用，并提供接入冗余1.接入层往上以Ethernet为主，逐步替代原有的FR/ATM接口1.Metro Ethernet层面是一个大带宽、广覆盖、低成本，以Ethernet技术结合IP/MPLS技术构建的汇聚和业务分发的层次2.通过Native Ethernet VLAN/EoMPLS PW/VPLS PW/Multicast Routing/VPN等技术构建若干个点对点或点对多点的Layer2和Layer3的业务域，彼此逻辑分开1.IP本地网作为互联网业务流量的汇聚和转发，衔接客户和骨干网1.个人客户的接入以DSL/Ethernet/PON为主要接入手段2.Wireless作为公众热点地区的接入手段3.一条物理接入线路复用多重业务4.带宽的规划要具备前瞻性5.发展和规划个人客户的CPE网关设备，具备更好的业务提供能力1.本地网业务中心是从传统本地网中区分出来的一个网络业务平台2.面向商务客户和个人客户提供运营商主导的一些半封闭式的业务，包括Voice, IPTV等和一些Premium的服务，如面向商客和个人客户的增值服务3.通过ME层面的支撑和业务分发，分配更多的本地带宽资源和更好服务品质给运营商自主的业务1.IP本地网与China 169骨干网的对接是IP/BGP的，主要交换互联网访问流量2.集团与本地网还可交换网通主导的基于互联网平台的增值业务流1.对于客户有需求直接接入集团第二骨干网的长途业务的情况，应尽量直接利用本地网的ME层面实现接入(本地网做L2)2.对于在本地和长途都有业务的情况可分别接入或通过和本地网业务中心的的对接实现(L2/L3)3.应尽量减少和避免跨域VPN的情况以清晰分工界面和简化故障排除1.Metro Ethernet层面的建设是本地网实现多重业务承载的基础和重点2.结合L2/L3 VPN技术实现多个相互独立又互通有无的逻辑业务域3.在本地网内区分出本地网的业务中心平台，结合ME实现高附加值业务的快速开发和部署4.与长途骨干网的对接应结合L2/L3技术，可清晰分工界面，简化技术部署和维护难度，提高服务质量 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID17http:/www.docin.com/webmoney对对CarrierEthernet的典型问题之二的典型问题之二CarrierEthernet成本是不是很贵？成本是不是很贵？可以用Ethernet端口的价格与SDH传输系统的列表价格进行一下简单的比较10G端口传输(OC192)为$75,000/10G, 业务增强以太网(10GE)为$75,000/10G, 标准以太网为$10,500/10G1G端口MSTP(GE)为$21,250/Gig, 业务增强以太网(1GE)为6,000/Gig, 标准以太网为$1,312/Gig纯粹的SDH POS传送效率高于Ethernet，但Carrier Ethernet的复用效率更高IP/Carrier Ethernet的上层业务能力更强(L1/L2/L3)向未来全IP/L3趋势的演进更平滑Cisco ONS 15454OC-192/STM-64 XFP-Based Optics Card$75,000Cisco ONS 154542-Port Gigabit Ethernet Module$42,500Cisco 7600 Ethernet Services 2x10G Line Card$150,000Cisco 7600 4-Port 10 Gigabit Ethernet Module$42,000Cisco 7600 Ethernet Services 20x1G Line Card$120,000 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID18http:/www.docin.com/webmoneyCarrierEthernet的相关技术的相关技术 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID19http:/www.docin.com/webmoney对对CarrierEthernet的典型问题之三的典型问题之三CarrierEthernet技术是不是非常复杂？技术是不是非常复杂？听到的关于CE的各种新名词和新技术以及标准，看上去很复杂EoMPLS, VPLS, H-VPLS, REP, MSTP, RPR, RRR, PBB, PBT, T-MPLSQinQ, 选择QinQ, 灵活QinQ, MAC-in-MAC, 业务选择HA, QoS, H-QoS, E-OAM, CFM需要重新关注到本质性的5个Carrier Ethernet要素：1.Standardized ServicesP2P? P2MP/MP2MP?2.ScalabilityVLAN, Service Instance, MAC3.Service ManagementControl/Management Plane, STP? MPLS? NMS?4.Reliability5.QoS这些技术改进都体现在两个地方：CE网络的边界技术(Edge)和CE网络的传送技术(Core) 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID20http:/www.docin.com/webmoneyCarrierEthernet的关键技术革新的关键技术革新传统以太网技术的不足传统以太网技术的不足传统以太网技术在多个方面难以满足运营商级的要求灵活的多业务的识别与映射Layer2 与Layer3的流量工程网络系统可扩展性与稳定性BDATM / FRPVC / DLCIEoMPLS PWBDVLANsL2interworkingBridging(vlanawareandvlanblind)VLANsSub-i/fSub-i/fPhysicalPortSub-i/fRoute (L3)Sub-i/fSub-i/fSub-i/f 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID21http:/www.docin.com/webmoneyCarrierEthernet的关键技术革新的关键技术革新EFP&EVCATM/FRlegacyserviceinstancePVC / DLCIP2PserviceinstanceBDI/FL3serviceinstanceEFPsL2inter-workingBridgingEthernetaccesstoL3VPN/IPEFPsPhysical PortBDBDL2 VFIMP2MPL2serviceinstanceEFPEFPEthernetFlowPointEVCEthernetVirtualCircuitEFP:-802.1Q-QinQ-Pseudowire/VPLS-L3VPN-IPSessions-MACAddressEFP灵活QinQ处理EVC业务映射 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID22http:/www.docin.com/webmoneyL3L3EoMPLSEoMPLSH-VPLSH-VPLSL2,PointtoPointL2,PointtoPointL2,BridgedL2,BridgedL2/L3integrationL2/L3integrationISGSubscriberSession*H-H-QoSQoSperperEFPEFP灵活灵活灵活灵活VLANVLAN处处处处理理理理1:1,1:21:1,1:22:1,2:22:1,2:2Push/Pop(1/2)Push/Pop(1/2)802.1ah*802.1ah*(MAC-in-MAC)(MAC-in-MAC)DPIDPISecuritySecurityOAMOAMSBCSBCVideoVideo个人客户个人客户STB商务客户商务客户Corporate个人客户个人客户STB商务客户商务客户CorporateCarrierEthernet的关键技术革新的关键技术革新新的业务接入与汇聚模式新的业务接入与汇聚模式个人宽带上网业务商务客户专线业务商务客户L2 VPN业务商务客户L3 VPN业务个人客户综合接入商务客户综合接入灵活的业务识别与映射附加的多业务特性提供安全，业务控制，视频优化每用户/业务逻辑的品质保障 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID23http:/www.docin.com/webmoney融合统一的光通讯技术作为底层的传输，本地或长途上层全IP组网，通过IP/MPLS技术统一提供L1/L2/L3的业务混合统一的光传输层面上层分成两部分，靠近客户边缘通过以太网技术组网，核心部分通过IP/MPLS组网，合作提供端到端的L1/L2/L3业务重叠统一的光传输层面之上叠加一层Packet Transport，提供L1/L2的业务只在需要的地方叠加部署路由器提供L3业务OpticalLayerL1/L2/L3业务业务PacketTransportOpticalLayerL3业务业务OpticalLayerL1/L2/L3业务业务多业务多业务IP网可能的架构网可能的架构IP/MPLSL2/3 VPNCEoPSDH/xWDMSDH/xWDMSDH/xWDMEthernet/1ah/1adPBT/T-MPLSEthernet/1ah/1adPBT/T-MPLSIP/MPLSIP/MPLSL2/3 VPNCEoPL1/L2业务业务 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID24http:/www.docin.com/webmoney目前典型的网络架构和多业务架构的映射目前典型的网络架构和多业务架构的映射AccessNodeIPProviderEdgeIPProviderCoreDSLAMEthernetResidentailBRASBusinessPE/SRCOREROUTER接入汇聚网络接入汇聚网络城域网城域网/本地网本地网省干网省干网/国干网国干网Optical LayerEthernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS)IP/MPLS (CEoP/L2/L3 VPN)Optical LayerEthernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS)IP/MPLS (CEoP/L2/L3 VPN)Optical LayerIP/MPLS (CEoP/L2/L3 VPN)IP/MPLS (CEoP/L2/L3 VPN)融合混合重叠 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID25http:/www.docin.com/webmoney几种架构的对比和讨论几种架构的对比和讨论重叠模式重叠模式重叠模式的特点是在Optical层面再叠加一层Packet Transport，提供L1/L2的业务，比Optical直接提供有更细的带宽颗粒度和更高的统计复用效率，对上有的技术(T-MPLS)远景上可以融合MPLS控制平面与IP层面的设备互动，形成某种程度的融合，但真正3层的业务，比如Internet访问还需要3层设备回到了最初ATM和IP重叠的模式，IP设备都是相互孤立的孤岛，孤岛之间通过L2电路直接互通只有纯粹的2层业务不需要3层设备配置相应的端口，所有3层业务还需要配置相应的L3设备和L3端口，核算一下实际的流量组成，所能节省的成本是非常有限的，而且网络的复杂度其实有增无减AccessNodeIPProviderEdgeIPProviderCoreDSLAMEthernetResidentailBRASBusinessPE/SRCOREROUTER接入汇聚网络接入汇聚网络城域网城域网/本地网本地网省干网省干网/国干网国干网Optical LayerEthernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS)IP/MPLS (CEoP/L2/L3 VPN)IP/MPLS (CEoP/L2/L3 VPN)重叠 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID26http:/www.docin.com/webmoney几种架构的对比和讨论几种架构的对比和讨论混合模式混合模式混合模式是目前的现状，只是在汇聚网中采用的技术是多样化的，有标准Ethernet，802.1ad/QinQ技术等，新提出来的还有EoMPLS/VPLS技术，以及802.1ah(Mac-in-Mac)等，当然PBT/T-MPLS也是可以部署和应用的比较统一的认识是在汇聚网内，对于Triple Play业务来说，标准以太网是不能满足需要的，主要体现在这几个方面：标准以太网是多点访问的LAN技术，流量工程是很难作的，包括单一流和汇聚流控制平面是SPT，无论收敛时间和收敛行为都不是可控的，存在环路和广播风暴问题存在MAC地址和VLAN的扩展性问题AccessNodeIPProviderEdgeIPProviderCoreDSLAMEthernetResidentailBRASBusinessPE/SRCOREROUTER接入汇聚网络接入汇聚网络城域网城域网/本地网本地网省干网省干网/国干网国干网Optical LayerEthernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS)IP/MPLS (CEoP/L2/L3 VPN)混合 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID27http:/www.docin.com/webmoney标准以太网的改进标准以太网的改进由于上述的缺点，一些新部署方式提出来对其进行优化，包括：每用户每VLAN或点对点以太网，使得汇聚网的面向接入节点的入口可以通过唯一的内外层VLAN组合来标识一个客户，同时通过部署QinQ来提高VLAN的扩展性，解决VLAN ID不足的问题VLAN也可以提供多业务区分，提供不同的逻辑拓扑给不同的业务树形拓扑，从汇聚面向接入的入口到汇聚面向IP的出口好像是点对点线路一样没有冗余线路设计，牺牲冗余来避免环路和生成树行为MAC-in-MAC (802.1ah)技术的引用可以进一步可以缓解VLAN-ID和MAC地址空间的压力，但其要求边缘必须是QinQ域，意味着只适合大型的汇聚域部署E-OAM相关标准的提出增强网络的可管理性尽管有所改进，但是一些关键问题和要求还不能解决和满足网络的可用性问题和细颗粒度的流量工程问题网络规模的扩展性问题还是没有解决，当在大型的城市进行多业务逻辑拓扑提供时仍然是捉襟见肘的业务智能与用户识别问题不能解决，可参考的参数只有L2的少量信息DSLAMEthernetResidentailBRASBusinessPE/SR接入汇聚网络接入汇聚网络IP/Layer31q/1ad/1ah 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID28http:/www.docin.com/webmoney标准以太网的改进标准以太网的改进REP(ResilienceEthernetProtocol)Ports are explicitly configured to be part of a segment. When all the links in the segment are operational, a blocked port is determined so that there is no connectivity between the edges A,B through the segment If a failure occurs within the segment, the blocked port goes forwardingABAB 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID29http:/www.docin.com/webmoneySegment2Segment1Segment3Segment3Segment1REP SegmentAlternate (Blocking) PortEdge PortSegment2ADBCEFGHIJKLABCDEFGHIJKLMBridged domain标准以太网的改进标准以太网的改进REP(ResilienceEthernetProtocol) 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID30http:/www.docin.com/webmoney标准以太网的改进标准以太网的改进REP(ResilienceEthernetProtocol)When wrapped into a ring, the REP segment can also provide redundant connectivity between any two switchesA combination of rings and segments allows creating almost any kind of network.ABABThe segment provides redundancy to the hosts within its boundaries: they can reach the rest of the network through either A or B.The segment will *not* unblock to cover a failure outside of its boundaries.BAxBAxBridged domainBridged domainHost RedundancyLink Redundancy 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID31http:/www.docin.com/webmoney标准以太网的改进标准以太网的改进REP的快速收敛的快速收敛Test Description16 Nodes 3750ME16 NodesME 340032 NodesME 3400Interface shutdownFiber pullInterface shutdownFiber pullInterface shutdownFiber pull5 VLANs 2 MAC per VLAN Total MAC learned= 1022.8 ms21.2 ms18.1 ms19.5 ms31.9 ms35.6 ms40 VLANs 2 MAC per VLAN Total MAC learned = 80 27.3 ms26.7 ms23.8 ms17.8 ms34.1 ms36.5 ms200 VLANs 2 MAC per VLAN Total MAC learned = 40035.6 ms42.2 ms16.3 ms17.9 ms57.1 ms50.0 ms400 VLANs 2 MAC per VLAN Total MAC learned = 80051.0 ms67.5 ms18.8 ms19.4 ms93.4 ms55.4 ms800 VLANs 2 MAC per VLAN Total MAC learned = 160072.8 ms114.1 ms19.8 ms18.3 ms100.5 ms112.8 ms996 VLANs 2 MAC per VLAN Total MAC learned = 199289.3 ms128.5 ms20.6 ms20.1 ms113.3 ms75.9 ms 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID32http:/www.docin.com/webmoney几种架构的对比和讨论几种架构的对比和讨论融合模式融合模式融合模式是端到端的IP/MPLS在一个IP基础架构上可再区分出汇聚网、本地网和长途骨干网，不同业务的架构可不同或甚至不区分汇聚网和本地网，将IP智能边缘推送到接入边缘是否存在汇聚网络，取决于IP智能边缘设备的位置，汇聚网本身可以是L2的，也可以是L3的所有的L1/L2/L3业务都是统一来提供的可以是构造出虚拟的P2P的L1/L2电路，MP2MP的L2或L3域AccessNodeIPProviderEdgeIPProviderCoreDSLAMEthernetResidentailBRASBusinessPE/SRCOREROUTER接入汇聚网络接入汇聚网络城域网城域网/本地网本地网省干网省干网/国干网国干网Optical LayerIP/MPLS (CEoP/L2/L3 VPN)融合 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID33http:/www.docin.com/webmoneyMPLS对以太网的改进对以太网的改进汇聚网仍然以L2的形态存在，以IP/MPLS技术模拟以太网，通过EoMPLS技术提供点对点以太网电路，通过VPLS提供多点对多点的以太网虚拟域，控制平面是IP/MPLS，技术本身是很成熟的L3的基础架构提供了网络的高可用性，2层电路或2层多点互联域的业务高可用性可以通过IP UC/MC的FC/TE，PW Redundancy等三层技术提供，涵盖了所有可能的故障L3网络的基础架构还确保了大规模部署的可扩展性和服务区域的可延伸性流量工程的能力非常强，可以再汇聚网的入口，也可以在汇聚网的核心，对单一的客户或单一的业务流这样的颗粒度进行流量走向的调度或流量大小的限制以及QoS调度天然具备L3的业务智能的条件，可在网络的最边缘接入点或逻辑域的边界识别业务和客户目前通过L2/L3，未来可通过L3-L7DSLAMEthernetResidentailBRASBusinessPE/SR接入汇聚网络接入汇聚网络IP/Layer3MPLS 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID34http:/www.docin.com/webmoney三层汇聚网三层汇聚网/三层到边缘三层到边缘汇聚网本身也可以是以三层的方式构建的，即为多业务构建多个三层的VPN域用于承载多业务，包括面向个人的Triple Play和面向商客的VPN业务也可以是IP智能边缘设备，BRAS或PE/SR部署到边缘，形成Fully Distributed的架构L3的优势在于网络的扩展、维护和建设都比较简单，扩展性、可用性和业务能力都很高，对组播的支持也非常好，这在大规模的Video业务部署时至关重要，此外L3的智能更多L3也有一些需要注意的地方：3层智能对于网络设备的压力可能更大，需要适当的分布式的部署模式流量一旦进入L3域就会天然的互通，需要在第一个L3入口处就需要完成认证、授权和计费功能DSLAMEthernetResidentailBRASBusinessPE/SRIP/Layer3IP/MPLSBusinessPE/SRResidentailBRAS 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID35http:/www.docin.com/webmoneyCarrierEthernet的关键技术的关键技术小结小结Ethernet Flow Point更灵活的流识别与分类和业务复用Ethernet Virtual Circuit标准化P2P/MP2MP业务连接更扩展的VLAN空间和业务服务能力通过IP/MPLS实现的更高的业务可靠性E-OAM端到端的运营、管理和维护机制QoSIP应用友好Layer2/3技术的无缝结合更有效的服务IP及上层应用 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID36http:/www.docin.com/webmoneyCarrierEthernet的部署路线图的部署路线图 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID37http:/www.docin.com/webmoney对对CarrierEthernet的典型问题之四的典型问题之四CarrierEthernet建设的切入点是什么？建设的切入点是什么？宽带Triple Play业务汇聚GE DSLAM汇聚IPTV, High Bandwidth, High Quality城域内的L2业务与传统ATM/FR业务替代Ethernet Access/UNIEthernet Transport 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID38http:/www.docin.com/webmoney对对CarrierEthernet的典型问题之五的典型问题之五CarrierEthernet未来发展趋势是什么？未来发展趋势是什么？未来网络发展的趋势是三层智能进一步下移目前已经证明了对于Video业务三层到边缘是具备明显优势的未来宽带接入的业务智能也会部分甚至全部的下移但对于Ethernet Transport/Backhaul的应用来说则没有明确的下移需求和必要随着多业务在IP网的融合程度不断提高，Carrier Ethernet在业务能力，网络架构的灵活性以及总体成本方面的价值将越来越明显的体现出来 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID39http:/www.docin.com/webmoneyCarrierEthernet的部署路线图的部署路线图Ethernet Access Domain-3MPLS DomainEthernetAccess Domain-1EthernetAccess Domain-2Ethernet Access - 3MPLS DomainEthernetAccess - 2EthernetAccess - 1阶段1IPTV/BB Aggregation, Video L3 to EdgeLegacy Business Service Upgrade (FR/ATM)阶段Ph2Business Service Expansion (SDH-based VPN Replacement, Metro Transport)NGN-AG/3G Backhaul阶段Ph3BB L3 to Edge 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID40http:/www.docin.com/webmoneyCarrierEthernet的应用案例的应用案例 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID41http:/www.docin.com/webmoney2006200520042007LaunchonafullATM-basedarchitectureLimiteddeploymentLargedeploymentontopofDAMBACKarchitectureExtendedDAMBACKdeploymentandTripleplayservicesmigrationfromATMnetworkInitialPSTNservicesmigrationFTNExTVideoServicesONLYTriplePlayFullNGNFranchTelecomTriplePlayServiceRoadmap 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID42http:/www.docin.com/webmoneyBRASIP/MPLSNationalBBATMBackhaulMetroEthernetATMNationalBBFranchTelecomTheBigPicture 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID43http:/www.docin.com/webmoneyRBCIATMATMNMNMNBNBNENENEFocusonthat 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID44http:/www.docin.com/webmoneyLastMileprovisioningPVCForTVBroadcastPVCForIGMPPVCForVOD/DHCP H.323WANDHCPClientNATLANDHCPServerPVCForInternetPVCForVISIOPVCForVOICEMulti-VC model fully appliedLivebox (SAGEM/THOMSON) is acting as both:-A switch for TV services-A router for others servicesMix of UBR, CBR and VBR for ATM COS in Local Loop. This ATM Class Of service are different in the backhaul 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID45http:/www.docin.com/webmoneyRBCIATMATMNMNMNBNBNENENEFocusonthatThe DSLAM has the following abilities: -Multicast IGMP proxy-Cross-connect multiple PVCs to one VLAN-DHCP relay (per vlan) Convert broadcast to unicastInsert own IP address as “GIADDR”Insert “NAS-id/SLOT-id/PORT-id/VPI-id/VCI-id” into option field 82Send towards DHCP server-Support for “CBR”,”VBR-rt”,”VBR-nrt”,”UBR”,”UBR+”,”GFR” ATM class of services -Support for ADSL,ADSL2,ADSL2+ and VDSL-Support of CAC (Connection Admission Control)-Full VLAN support including IEEE 802.1ad (QinQ)-QoS (Shaping/Policing) based on layer 2 information (IEEE 802.1q/p)-Support SNMP for fault management and provisioning 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID46http:/www.docin.com/webmoneyRBCIATMATMNMNMNBNBNENENEFocusonthat 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID47http:/www.docin.com/webmoneyGEUNIprovisioningBasic Model Per service VLAN foro VODo TV Broadcasto Videoconferencingo Internet Access Per ISP per VLAN foro Internet Access for wholesaleDual uplink is and will be there for a while ATM for Residential/Wholesale/Enterprises services Initially Video Only on GEModel for (Future) business customers still subject to discussion (DSLAM will perform QinQ)PVCForTVBroadcastPVCForIGMPPVCForVOD/DHCPPVCForInternetPVCForVISIOPVCForVOICESTM-XATMVLANforManagementVLANforTVBroadcastVLANforVOD/DHCPIGMPproxyDHCPsnooping/Option82insertion 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID48http:/www.docin.com/webmoneyRBCIATMATMNMNMNBNBNENENEFocusonthat 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID49http:/www.docin.com/webmoneyConnectingtheDSLAMDHCP relay for Video-based services (with Option 82 retention)IGMP snoopingIGMP querier for IGMPV2 requestTraffic from DSLAMIP filters on routers at ingress, theses filters delete all packets except those with :o Source IP address within subnet allocated to DSLAMo Destination IP within those of devices which should be accessible to usersAntispoofing : DHCP Snooping + DAIDSLAM : No proxy arp at the router which connects it No peer to peer possible using PVLAN Edge like featureGE 1/1GE 1/3BCASTVLANRoutedPorts:(GE,10G,802.1AD)TrunkPorts:GENoL2control-planetrafficSVIint:VOD/BCast/managementEFP:xconnect/EVC 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID50http:/www.docin.com/webmoneyWhichdrasticchangesareincluded?Transition of Internet Traffic (PPPoE-Based) “Switch” PPPoE from ATM network to Metro-E Must not break existing offers (Retail & Wholesale) Introduces need for L2VPN (PtP EoMPLS PWs) PW is between NE and NM (similar to ATM VP)L2/L3 MUX UNI feature needed NE Becoming PE and P Pseudo-wire/EVC Redundancy NM redundancy is mandatoryPPPoEoQBRASIP/MPLSMetroEthernetNENM.1qtrunk 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID51http:/www.docin.com/webmoneyRBCIATMATMNMNMNBNBNENENEFocusonthat 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID52http:/www.docin.com/webmoneyUnicastroutingThe backhaul network is an IP area where IS-IS is running, IS-IS is the IGP of the RBCI.Multi level IS-IS L1/L2 implementation : Optimization of convergence Limitation of the interaction between RBCI/Metro-E IslandsL1/L2 Border is the NC.BGP : for external exchange Customer address pools PFS addressISIS Fast-ConvergenceKnown Optimizations will be usedFast-Convergence is critical for:- VOD service (IP Unicast routing based)- TV broadcast will rely on IP unicast routing only (SSM)DSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIIS-ISL2ISDSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIIS-ISL1DSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1NCRouteurBackhaulBackhaulDSLAMsDSLAMsRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL2ISDSLAMsIS-ISL2RBCIRBCIRBCIRBCIRBCIRBCIRBCIISL1RBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1NCRouteurRBCIIS-ISL1NCRouteur 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID53http:/www.docin.com/webmoneyIS-ISSnapshotNCNCNMNMNENENENRNRIS-IS L1 OnlyIS-IS L2 OnlyNC L1/L2Non-symmetric metrics used:o NM-NE = 9 (others NM-NE-NE = 10)o NM-NC = 40o NM-NM = 6o NC-NC = 3 (L1) / 25 (L2)Routerisis65000Net area_idIs-type level-1Metric-style widePassive-interface Loopback0set-overload-bit on-startup 300max-lsp-lifetime 65500lsp-refresh-interval 65000no isis hello paddinglog-adjacency-changesPassive-interface Loopback0interfacePoX/Yip router isis 65000isis circuit-type level-1isis metric X level-1 isis hello-multiplier 3isis hello-interval 3isis network point-to-point 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID54http:/www.docin.com/webmoneyBGPSnapshotNCNMNMNENENENE/NM Are Client from 2 RR NCsNCs Injects 60k Routes from AS3215 ONLY into NE/NMrouterbgp3215no synchronizationbgp log-neighbor-changesneighbor NB peer-groupneighbor NB remote-as 3215neighbor NB update-source Loopback0neighbor NB version 4neighbor peer-group NBneighbor description neighbor peer-group NBneighbor description address-family ipv4redistribute connected metric 0 route-map CONN2BGPneighbor NB activateneighbor NB send-communityneighbor NB route-map NENB -OUT outneighbor peer-group NBneighbor peer-group NBno auto-summaryno synchronizationexit-address-familyno ip http serverip bgp-community new-formatNCRoute-ReflectorsRoute-Reflectors Clients 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID55http:/www.docin.com/webmoneyMulticastroutingBC-TV channels distribution : Through the ATM network, no PIM interaction between the ATM network end the backhaul network. Activation of the multicast at the backhaul border. Through the RBCI later, complete PIM integration of the backhaul and the backbone networksPIM and IGMP querier are activated on all the routers of the backhaul network.- Broadcast of the channels on demand from the NM down to the DSLAM- Some most watched channels can be always sent into the backhaul ring (static IGMP for some group of channels)Multicast PIM routing in the Metro-E :- Between the NM and the ring routers- PIM-SSM & SSM Mappings as STB are V2 today Canal SatATMTPS-LGlobeCastRBCIIP/MPLS 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID56http:/www.docin.com/webmoneyRoadmapforDAMBACKusageevolutionRolling-out of Video Services( 100s of Cities covered)Audio/VisioISG Migration20062005xDSL to L3VPN, L2VPNInternet/Wholesale20073G/Node-B / MSANResidentialEntreprisesInfrastructure2008 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID57http:/www.docin.com/webmoneyDynamicallychangefeaturesofActiveSessions-MQCPolicies-QoS与带宽资源控制与带宽资源控制(水龙头水龙头)-SecurityPolicies(ACLs)-安全策略安全策略-VRFSelection-多业务域映射多业务域映射-AccountingPolicies-多样化的计费策略多样化的计费策略-ServiceAuthorizedNetworkAccess-网络准入与业务授权网络准入与业务授权-L4Redirect-业务门户业务门户-Pre-paidbilling-预付费预付费TobedevelopedInternet GW to Edge, ISG DeployAn ISG handles the following key aspects of subscriber (IP) session management:Subscriber identification, authenticationService and policy determinationSession policy enforcement, QoS/Bandwidth and SecuritySession life-cycle managementAccounting for access and service usageSession state monitoringPolicy-ManagementMigration of conversational services into DambackFTTX sub-islands connection into NECollapsing Metro-E offers for business customers into DambackRBCIATMATMNMNMNBNBISGISGISGPolicyPUSHorPULL(CoA/PoD) 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID58http:/www.docin.com/webmoney Transportof2G/3GoverEthernetbackhaulingTDM and ATM encapsulationoverMPLSoverEthernet for respectively GSM and UMTS (Pseudo Wire mechanisms in the SHDSL Modem/NTU)ATM&TDMoverPWMPLStunnelsoverEthernetUMTSRNCGSMBSCNodeBBTSSHDSLLinkEthernetDSLAMTDM(G.703/704E1)ATM(I.432.3E1)ATMSTM1NxE1GbEGbEIMAifneededNTUSHDSLModemEthernetMPLSMPLSATM+TDMATM+TDMTransparentEthernet Access Network with MPLS End to End (static)? 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID59http:/www.docin.com/webmoney