运营商级以太网--思科

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1、 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，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:/ Ethernet的历史发展 The History & DriversCarrier Ethernet的应用架构 The ArchitectureCar

2、rier 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:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID4http:/ 2006

3、Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID5http:/ 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

4、 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-MA

5、N 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:/ domain.76097609DSLAMsDSLAMs1-48Ethernet, MPLS &IP

6、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 C

7、onfidentialPresentation_ID7http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID8http:/ 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

8、Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID9http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID10http:/ (Broadband Aggregation)DSLAM, Wi-Fi, PON/FTTH, EthernetHigh Bandwidth, Multicast, IPTV Delivery以太网接入 (Ethernet Access)Ethernet UNI A

9、ccessLower 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 20

10、06 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID11http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID12http:/ 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 Ethe

11、rnet 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID13http:/ (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,

12、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 Aggregat

13、ion/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:/ 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/

14、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:/ PON, Ethernet Switch

15、, 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

16、, Inc. All rights reserved.Cisco ConfidentialPresentation_ID16http:/ 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.

17、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

18、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 2

19、006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID17http:/ 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

20、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

21、 reserved.Cisco ConfidentialPresentation_ID18http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID19http:/ 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

22、 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:/ 与Layer3的流量工程网络系统可扩展性与稳

23、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:/ / DLCIP2PserviceinstanceBDI/FL3serviceinstanceEFPsL2inter-wo

24、rkingBridgingEthernetaccesstoL3VPN/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:/

25、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:/ 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

26、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:/ LayerEthernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS)IP/MPLS (CEoP/L2

27、/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:/ 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

28、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/SRCOR

29、EROUTER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:/ 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

30、，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 200

31、6 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID27http:/ 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

32、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:/ are explicitly configured to be part

33、 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 Co

34、nfidentialPresentation_ID29http:/ 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:/ wrapped into a ring, the REP segment can al

35、so 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

36、 to cover a failure outside of its boundaries.BAxBAxBridged domainBridged domainHost RedundancyLink Redundancy 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID31http:/ Description16 Nodes 3750ME16 NodesME 340032 NodesME 3400Interface shutdownFiber pullInterface shutdown

37、Fiber 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

38、 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,

39、 Inc. All rights reserved.Cisco ConfidentialPresentation_ID32http:/ LayerIP/MPLS (CEoP/L2/L3 VPN)融合 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID33http:/ 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

40、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:/ 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Fu

41、lly 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. Al

42、l rights reserved.Cisco ConfidentialPresentation_ID35http:/ 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_ID36h

43、ttp:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID37http:/ 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:/ Transport

44、/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:/ Access Domain-3MPLS DomainEthernetAccess Domain-1EthernetAccess Domain-2Ethernet Access - 3MPLS DomainEthernetAcce

45、ss - 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_ID40htt

46、p:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID41http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID42http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID43http:/ 2006 Cisco Systems, Inc. All rights

47、 reserved.Cisco ConfidentialPresentation_ID44http:/ 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. Thi

48、s ATM Class Of service are different in the backhaul 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID45http:/ 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

49、 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 includi

50、ng 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:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresenta

51、tion_ID47http:/ 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 c

52、ustomers still subject to discussion (DSLAM will perform QinQ)PVCForTVBroadcastPVCForIGMPPVCForVOD/DHCPPVCForInternetPVCForVISIOPVCForVOICESTM-XATMVLANforManagementVLANforTVBroadcastVLANforVOD/DHCPIGMPproxyDHCPsnooping/Option82insertion 2006 Cisco Systems, Inc. All rights reserved.Cisco Confidential

53、Presentation_ID48http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID49http:/ 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 ex

54、cept 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 1/3BC

55、ASTVLANRoutedPorts:(GE,10G,802.1AD)TrunkPorts:GENoL2control-planetrafficSVIint:VOD/BCast/managementEFP:xconnect/EVC 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID50http:/ of Internet Traffic (PPPoE-Based) “Switch” PPPoE from ATM network to Metro-E Must not break exist

56、ing 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

57、 reserved.Cisco ConfidentialPresentation_ID51http:/ 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID52http:/ 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 Limitati

58、on 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

59、routing only (SSM)DSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIIS-ISL2ISDSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIIS-ISL1DSLAMsRBCIRBCIRBCIRBCIRBCIIS-ISL1NCRouteurBackhaulBackhaulDSLAMsDSLAMsRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL2ISDSLAMs

60、IS-ISL2RBCIRBCIRBCIRBCIRBCIRBCIRBCIISL1RBCIRBCIRBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1RBCIIS-ISL1RBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIRBCIIS-ISL1NCRouteurRBCIIS-ISL1NCRouteur 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID53http:/ L1 OnlyIS-IS L2 OnlyNC L1/L2

61、Non-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-a

62、djacency-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:/ Are Client from 2

63、 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 descriptio

64、n 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-

65、ReflectorsRoute-Reflectors Clients 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID55http:/ 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

66、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 (s

67、tatic 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:/ of Video Services

68、( 100s of Cities covered)Audio/VisioISG Migration20062005xDSL to L3VPN, L2VPNInternet/Wholesale20073G/Node-B / MSANResidentialEntreprisesInfrastructure2008 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID57http:/ GW to Edge, ISG DeployAn ISG handles the following key as

69、pects 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 convers

70、ational 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:/ Transportof2G/3GoverEthernetbackhau

71、lingTDM 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:/