城域接入网络解决方案ADSL

1、,Cisco城域接入网络解决方案 -ADSL,议程,思科DSL解决方案概述 Cisco 6260 IP DSL 交换机 Cisco DSL 宽带服务器 Cisco DSL网络管理,ADSL Functional Segments,CPECustomer Premise Equipment NAPNetwork Access Provider NSPNetwork Service Provider,CPE,NAP,NSP,Video,Voice,Content,ATU-R,DSLAM,Aggregation Service Selection,Core,Termination Service S

2、election,Enterprise,Internet,ISP,Internet,Cisco GlobalDSL- 新一代业务的基础,企业,PSTN,IP+ATM MPLS,家庭办公室、个人用户,主要的分支机构,中小企业,家庭用户,本地话音业务 可网管的话音 和数据 VPNs 专线的替代 视频会议 VoD Internet,高带宽 = 多业务 = 高利润,ISP,6400/7400,Cisco 6000,6400/7400,6260,6015,Cisco 6260,MDU,议程,思科DSL解决方案概述 Cisco 6260 IP DSL 交换机 Cisco DSL 宽带服务器 Cisco D

3、SL网络管理,DSL 发展历程,什么是 “IP DSL Switch”?,将 ATM 交换机和IP 路由器集成在一起 可网管的 DSL 服务的基础，支持多种IP业务 MPLS 和IPSec VPN DSL 线路的汇聚 WebCache Aware - 节省广域网带宽 视频娱乐的组播 防火墙提供更强的安全性 支持多种DSL 多种中继接口 运营商级设计,More IP rich services can be enabled in the future, IP Multicast will allow replication at the edge thus eliminating wasted

4、bandwidth Web caching at the Switch can reduce internet traffic trunk SP can target MXU applications with services like Video on Demand, Web hosting, File backups “Cherry-pick” the IP services based on hardware potential,传统 DSLAM 应用,Enterprise,Internet,ISP,PVC,Aggregated PVC, VC depletion on the SP

5、access side VC provisioning delays VC limitation could restrict number of subscribers,IP DSL Switch - Aggregatioat at the Edge,ATU-R,IP DSL SWITCH,MPLS VPN or IP Core,ISP or Corporate, VC aggregation at the IP DSL Switch Switch acts as a PE for MPLS core to enable VPN services Reduces provisioning d

6、elays,Cisco 6000 IP DSL Switch Cisco GlobalDSL的基础,Cisco 6000 IP DSL Switch 产品,市场,Cisco 6015,N.A. CO, MDU, DLC,Cisco 6260,W.W. CO, N.A. MDU,认证,ETSI and NEBS,ETSI,密度,24 to 48 线,120 to 240 线,应用,Internet 访问 商务 话音/数据集成,IOS, ATM, DSL(ADSL, SDSL, G.shdsl) 和网管,投资保护,产品,N.A. CO,NEBS,128 to 256 线,Internet 访问 商

7、务 话音/数据集成,Cisco 6100,Internet 访问 商务 话音/数据集成,Cisco 6260 机箱,面向国际 PTTs, CLECs, MDUs 120-240 用户线路 可扩展的、高性能的ATM 结构 1 STM-1/OC3, E3 ,8xE1上联端口 支持CoS/QoS 基于公平机制的级连最多可连接13个 DSLAM,共3,120个用户线路 支持ATM 信令 (PVC,SVC,SPVC,VP Tunnel) 基于IOS的软件 运营商级设计 and 兼容所有的 ETSI 标准ADSL (CAP and DMT), G.lite, SDSL, G.SHDSL and Cisco

8、 DSL Manager,Cisco 6260 机箱,30 xTUC 槽位 四口模块密度 = 120 端口 八口模块密度 = 240端口 两个网络接口模块槽位 主用/备用 13.5 RU 23.5 in. 高， 19 in. 宽 11 in. 深 兼容NEBS标准 集成电源模块和风扇系统 支持1+1 和 N+1冗余备份 AC/DC 电源,OC3/OC12, E3, E1 WAN interface,Port 1,Port n,155 Mbps,STUC Card 2,ATUC Card 1,STUC Card 3,xTUC Card n,IP DSL Switch,Multirate DSL

9、ADSL/SDSL/G.shdsl/IDSL,*Available 1HCY00,660 Mbps Cell Switch Fabric 1 M+ Cell Buffer,Cisco 6000 IP DSL 交换机体系结构,IP Services,MPLS,“Subscriber Management”,4x ADSL 线路模块,支持 6015, 6160, 6260 支持线路编码: ANSI T1.413 Issue 2 ITU G.992.1 (G.dmt), G.992.2 (G.lite), G.994.1 (G.hs) 动态协商 ITU or ANSI 连接 机箱密度: 6015 -

10、 24 用户线路 6160 - 128用户线路 6260 - 120用户线路,8x ADSL 线路模块,支持 6015, 6160, 6260 支持线路编码: ANSI T1.413 Issue 2 ITU G.992.1 (G.dmt), G.992.2 (G.lite), G.994.1 (G.hs) 动态协商 ITU or ANSI 连接 机箱密度: 6015 - 48 用户线路 6160 - 256用户线路 6260 - 240用户线路,8x SDSL/G.SHDSL 线路模块,支持 6015, 6160, 6260 2B1Q & TC-PAM 支持多速率，最高可到双向2.3 Mbps

11、 ATM 帧结构 机箱密度: 6015 - 48用户线路 6160 - 256用户线路 6260 - 240用户线路,NI-2 电信级可靠性,I/O Board,PHY Layer Signals (backplane),Primary NTR,Primary SMB,Primary DSB,Primary NI-2,Phy IF,Ref. Timing,Switch,IOS Proc.,System Failure,Secondary NTR,Secondary SMB,2nd DSB,xTU-C #1,xTU-C #2,xTU-C #3,xTU-C #30,DSB = Digital Se

12、rial Bus SMB = Serial Management Bus NTR = Network Timing Reference,Secondary NI-2,NI-2 STM1 冗余备份,APS 冷备份可在 STM1/STM1 (中继和集连端口), E3/2xE3上实现 每块 NI的端口均连接物理线路 可保护集连机箱和独立机箱 1+1 保护,System Failure,Primary,Secondary,Secondary,Card Failure,Fiber Failure,Data path,Physical links/fiber,6400,6400,NI-2 E3 冗余备份,

13、1+1 保护 APS 冷备份可在 E3/2xE3上实现 接口板上的物理链路 可保护集连机箱和独立机箱,System Failure,Secondary,Secondary,Card Failure,Previous link,Active links,I/O Board,Secondary,6400,NI-2 nxE1 (IMA) 冗余特点,Unidirectional, non-revertive, 1+1 IMA implementation Cold Redundancy is provided on E3/nxE1 and E1/nxE1 (trunk only) Physical l

14、ink connections on I/O Board Provided for both subtended and single nodes,System Failure,Secondary,Card Failure,Previous link,Active links,I/O Board,Secondary,6400,DS3 or E3,OC-3/STM-1,nxT1/E1,使多个 IP DSL 交换机共享同一上连链路 Cisco 支持两种集连方式 菊花链 树状结构 Cisco在整个集连体系中保证了对上连链路的公平使用,集连概念 - Subtending,集连概述,支持最多在每一条AT

15、M上连链路上集连13个节点 一个WAN DSLAM 加 12 个集连 DSLAMs NI模块上最多有两个集连端口 集连配置选项: STM-1 (OC-3) / STM-1 (OC-3) E3 (DS3) / E3 (2xDS3) DS3 / 8xT1(E1) (IMA) 流量的公平机制和 QoS,级连结构 - 树型,Tree Topology Two E3/DS3 subtended ports per shelf One E3/DS3 WAN port at main shelf Up to 12 total subtended shelves,6260 DSLAM,6260 DSLAM,6

16、260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,DS3/E3 WAN,Central Location,Remote or Local,E3/DS3 Subtend Interconnect between all DSLAMs,级连结构 - 菊花链,Daisy Chain Configuration One OC3/STM1 subtend port per shelf One STM-1/OC-3 WAN on base shelf Up to 12 subtended shelves,6260 DSLAM,6260 DSLAM,

17、6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,STM1/OC3 WAN,Central Location,Remote or Local,STM1/OC3 Interconnect between all DSLAMs,6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,6260 DSLAM,N x E1/T1 WAN,Central Location,Remote or Local,n x E1 / T1 Interconnect between all DSLAMs,S

18、tar Configuration (n = 1 : 8) One nxE1/T1 IMA subtend interface per shelf One E3/DS3 or nxE1/T1 on main shelf Max of 8 T1/12 E1 interfaces on main shelf,级连结构 - NxE1,Subtending Fairness,1/4 Upstream BW,1/16 Upstream BW,1/8 Upstream BW,1/2 Upstream BW,1/4 Upstream BW,1/8 Upstream BW,1/16 Upstream BW,S

19、ubtend Architectures,Service Selection Gateway,PSTN,Voice Gateway,Network Management and Provisioning,Packet Backbone,ATM Backbone,LEC,ISP,Enterprise,Internet,Aggregation,DS3, E3, or OC-3 (w/DS3),DS3 or E3,OC-3/STM-1,OC-3/STM-1,nxT1/E1,nxT1/E1 or DS3,Up to 4 IMA groups per nxT1/E1 interface (trunk o

20、r subtend),NI-2 功能总结,支持扩展ATM服务的ATM交换矩阵 支持多种广域网端口 集连 3,120 端口/系统 (DSL 业务) 基于 支持冗余备份,Console/ Cisco IOS 软件和 SNMP以太网带外网管端口 支持SNMP agent/MIB 系统时钟和冗余控制 告警中继接口 IP 交换 and MPLS,Cisco IOS 软件概述,基于 LightStream 1010 软件 扩展版本并在部分功能上有所增强 增强的 ATM QoS 和 SVC 支持 (UBR, ABR, VBR-nrt, VBR-rt, CBR) 增加 DSL 的调制解调功能 支持所有的 AT

21、M 业务 ATM QoS 和流量管理 PVCs, SVCs, soft PVCs ILMI and OAM 信元 MPLS VPN CLI 和 SNMP 网管,ATM 交换,高性能的 ATM 交换矩阵 1M+ 信元共享内存 三条交换端口组, 每条 165 Mbps 本地端口和集连端口 WAN 中继端口 SAR 处理器端口 660-Mbps 交换能力 12.8微秒延迟,ATM Traffic Classes,四个优先队列 CoS/QoS CBR 速率限制业务，需要保证带宽和时延 VBR-rt 时延敏感的话音和视频业务 VBR-nrt 高优先级的数据业务 UBR 低优先级的数据业务 EFCI (A

22、BR) 保证最小流量,流量整形 - Traffic Shaping,企业,企业,个人用户,Shaped VP,电信运营商,整形后的 VP,家庭用户,每个广域网端口支持最多256条VP 支持最多32条VP被整形 可以提供统一的ATM服务以保证与公共物理流量一致 整形参数 最小速率 = 6 信元/秒 最大速率 = 线速 最大信元时延 = 45 微秒 (最坏情况),Maximum Fill Amount and PPD Threshold (Configurable),EPD Threshold (Configurable + Enable/Disable),EFCI Mark and CLP Dr

23、op Threshold (Fixed at 50%, Selectively Enable or Disable),50%,Port/Shelf Buffer,EPD/PPD,Offers user-configurable thresholds (per VC) Each VC checks to see how it is doing against port-level buffer threshold Dropping can be on packet boundaries (EPD, PPD) if VC is configured for AAL5,PVC 支持,VP 和 VC

24、交换 UNI 信元格式 (8-bit VP 字段) 支持硬件寻址 支持每个用户线路可设置256条VC 支持硬件存表 每个系统可设置512K的双向VC,SVC 支持,ITU, ATM Forum UNI 3.1/4.0 SPVC 65K VCs /系统 256 /端口（用户端口） 250 呼叫/秒 IISP (静态) 和 PNNI (动态) 呼叫路由 关于带宽管理的呼叫控制 用户可以制定相关策略,SPVC, Soft PVC - Reduce manual configuration steps of PVC at each hop - Subscriber provisioning is ea

25、sier on subtended DSLAMs - PVC with reroute or retry capability - Soft PVC will be established only if neighbors discover each other,通过IP完成投资保护,IP,ATM,VC,ATM 交换 CBR, UBR, ABR, VBR(rt & nrt) ADSL,SDSL, G.SHDSL, IDSL,IP 路由 MPLS 边缘 LSR, 桥接, RBE PPP终结, IP QoS/CoS,当前在DSL交换中实现IP的领先地位,Cisco 6000,MPLS,数据主干,

26、信元主干,非 MPLS,MPLS,MPLS/VPN: 高性能 ATM+IP 解决方案,MPLS/VPN 减少阻塞并且通过L2TP隧道可以提高网络流量效率，每个DSLAM的每块NI-2模块可以支持50个VPN 通过提供增强业务给现有的和潜在的商业用户可以使电信运营商获得巨大的利润 ATM+IP 功能, 如 MPLS, 提供投资保护,How about security ? Security is comparable to todays ATM or FR network. Who are the target customers ? Customers could be any enterpr

27、ise with a large number of remote sites connected to network using a Service Providers VPN backbone Customers interested in reducing the cost of leased line connectivity,Benefits of MPLS-VPN on IP DSL Switch,Service Provider,Future Managed Services: Multicast Video,Stored or Live Video Feed Broadcas

28、t TV( Imedia, Coolcast),Point-to-Multipoint Video Feed (Multicast Transmission),Multicast IP PIM Saves bandwidth on the network More efficient host/core processing,Intel NIC & USB Modems,Cisco SOHO 77/78 xDSL Router,Cisco 2600/3600 和 ADSL WIC,Cisco 1700 和 ADSL WIC,SOHO DSL 访问,小企业/个人用户,家庭用户,企业分支 机构,小

29、企业/ 分支机构,商业级的 安全性和VPN 集成的高质量的话音 不同的服务等级 业务相关，可管理性，可信赖性,Cisco 827/828 xDSL Router,Cisco 商业级 DSL,Partners,Bridge/ Modem,Cisco DSL CPE 产品,Cisco IOS,单一用户 没有安全机制y 没有管理 非 Cisco IOS,Cisco SOHO DSL,传统Internet访问,Cisco 600,SDSL 和 Cisco 633 + router,Internet访问 通过数据包过滤和防火墙的安全性 Cisco IOS 可管理性和可信赖性 用户不能通过升级得到增值服务

30、,Cisco 6000 DSLAM功能,支持多种DSL ANSI T1.413, ITU G.dmt, G.lite, G.hs, SDSL, G.shdsl, IDSL 在多POP解决方案中100% 适用于各种用户 PTTs, DLC/RT, MDU 基于标准的市场占有 1M+ 用户 自动 CPE 配置 Cisco IOS IP 路由 可扩展的、安全的 MPLS VPN 和商业级 IP 服务 Layer 3 /4 支持 防火墙, QoS, 网页缓存 运营商级的 ATM 交换矩阵 支持所有 CoS/QoS 公平机制的级连 高扩展性的 SVCs/SPVCs 以实现动态服务选择 基于公平机制的集连

31、方式，提高网络利用率 运营商级设计 NEBS 和 ETSI 认证 可扩展的配置，检错和性能管理,议程,思科DSL解决方案概述 Cisco 6260 IP DSL 交换机 Cisco DSL 宽带服务器 Cisco DSL网络管理,宽带汇聚服务平台,Cisco 6400 Carrier-class Broadband/ATM Aggregation,Cisco 7200 Series ISP/Enterprise-class Broadband Aggregation,Cisco VPN5000 Series Carrier-class IPsec VPNs,Cisco 10000 Broadb

32、and Provider Edge Gateway,宽带接入服务器产品定位,Performance,7200,Scalability,7200 NSE-1/NPE 400,6400 NRP-2,6400,Carrier-class 14,000 sessions,Carrier-class 96,000 sessions,8,000 sessions,2,000 sessions,Cisco 6400 电信级宽带服务器,Integrated ATM switching, PPP aggregation, and IP routing Fault tolerant system OIR (hot

33、 swappable) 12-inch depth 3 chassis in telco rack Alarms, relays, and health monitors NEBS Level 3 and ETSI,Cisco 6400 组成,Node switch processor (NSP) 5 Gbps ATM switch and system processor 32K VCCs Node route processor (NRP-1) 7200 NPE-200 class router 155 Mbps backplane connector (OC-3/STM-1) (NRP-

34、2) Dual 7200 NPE-300 class router 622 Mbps backplane connector (OC-12/STM-4) Node line card (NLC) OC-3/STM-1, DS-3, and OC-12/STM-4 ATM interfaces,NRP2 优势,Increases Cisco 6400 scalability The flagship platform for scaling broadband services Investment protection Increase performance without “forklif

35、t upgrade” NRP-2 can coexist with NRP-1,NRP-2 硬件特点,Scalability Capable of Scaling up to 16k sessions (8 x current NRP) Performance OC-12/STM-4 ATM backplane and GE interface More than twice the forwarding rate of NRP-1 Management Centralized in NSP for NRP-2 card management,NRP-2 硬件技术,Dual Processor

36、 Architecture Dual RM7000 (270MHz) with support for up to 2 x 512 MB SDRAM Increases scalability and performance by separating the forwarding plane and control plane Control plane: creation and maintenance of sessions and tunnels Forwarding plane: packet forwarding and CEF switching,Gigabit Ethernet

37、 Uses existing Cisco GBIC technology IEEE 802.3z compliant GBIC options SX - 500m MM LX/LH - 5Km to 10Km SM ZX - 10Km up to 70Km SM,宽带接入服务器-Cisco7200VXR,SDH155M POS ATM155M ATM E1 CES DPT622M 10/100/1000M Ethernet E3 E1 CE1 DDN: nk FR(X25) VOIP Dial(MODEM)/ ISDN DSL(PPPoE,PPPoA, L2TP) CABLE Wireless

38、 压缩,8,000 并发PPPoE 会话. 支持MPLS/VPN功能 SSG,7400- 7200 VXR的新发展,7206VXR + NSE-1 + I/O with GE 5 PA slots MIX Bus = 7400 ASR,7400 ASR Builds on proven 7200 technology Same capabilities as a VXR with NSE-1 at 1/3 the rack space Builds on latest 7200 I/O controller technology for built in Ethernet ports and

39、management functions,Cisco 7400 ASR Rack & Stack,3500 Switch,BACK,3500 Switch,FRONT,Service Blower,Active Monitor,Service Blower,Active Monitor,Traffic segregation at the backhaul,Cisco 10000 Series - Overview -,IP Services Most comprehensive set of PXF-accelerated IP features enabling revenue gener

40、ating services Scalability Industry leading density, multiple form factors Performance PXF-accelerated services deliver line-rate performance Carrier-Class Reliability Hardware and software designed for 99.999% availability,Ciscos IP Edge Aggregation platform,Cisco 10005,Cisco 10008,Line-rate Perfor

41、mance with MULTIPLE IP services,Cisco 10000 Broadband Aggregation,Phase 1 program committed EFT - CY01 Q3 FCS - CY01 Q4 Phase 2 target H1CY02 LAC, Tunnel Switching + 2x scalability + more interfaces Phase 3 target H2CY02 SSG + additional scalability + more interfaces,Phase 1 Committed Features Subsc

42、riber Access LNS, RBE, PTA, RFC2684, Routed AAA/Security Radius, TACACS+, PAP/CHAP, ACL for PPPoE and RBE QoS Per-VC shaping, queuing. Per VC WRED, CAR, CBWFQ Scalability 30K+ sessions, 30K VCs, 8K tunnels Management VPDN MIB support, Range-based VC config Interfaces All existing 10000 line cards +

43、4xOC3 ATM,PXF-Accelerated Broadband Features,Access Methods (How Subscriber Traffic reaches NAP),Layer 1 - xDSL (ADSL, SDSL, G.Lite, G.SHDSL) Layer 2 - ATM Layer 3 IP Traffic delivered via Bridging, PPP or Routing,Access Protocols,RFC 1483 Bridging RFC1483 Routed (IP over ATM) Routed Bridged Encapsu

44、lation (RBE) PPP over Ethernet ( PPPoE) PPP over ATM ( PPPoA),Bridging Implementation,CPE - RFC 1483 ( now RFC 2684) Bridging Aggregation/Termination - Integrated Routing Bridging ( IRB) - Routed Bridge Encapsulation (RBE) Core - Usually ATM , if no aggregation used - With VC Aggregation, typically

45、IP or IP +ATM,How does RBE work ?,Subscriber traffic is carried in a BPDU The Routed-Bridge ATM interface treated as a routed interface. For packets originating from the subscriber end - Ethernet header is skipped - Packet forwarded based on layer 3 information For Packets destined to the subscriber

46、 end - Destination IP address is checked on the packet - Outbound Interface is determined from Routing Table - ARP table is checked for the destination Mac address, if none found than arp request sent out on the destination interface only,Typical RBE Architecture,ATU-R,DSLAM,6400,Core,Bridged CPE,Br

47、idged CPE,IP=192.168.1.2 GW= 192.168.1.1,IP=192.168.1.1,IP=192.168.2.3 GW= 192.168.2.1,- Bridged Traffic is routed by the 6400 to destinations - 6400 RBE interface address is host default gateway - Scales much better than bridging Subscribers are in different broadcast domains With unnumbered, subsc

48、ribers are on same subnets With unnumbered, need routes to subscribers (/32 dynamically installed with dhcp relay),IP=192.168.2.1,PPP Implementation,Three Access Methods from Subscriber - PPPoA, PPPoE, L2TP Client Aggregation - PPP Sessions terminated - PPP Sessions Tunneled over to NSP Core - end t

49、o end ATM PVC, PPP terminated at NSP - IP, ATM or IP + ATM - ( L2TP, L2F, MPLS/VPN),How Does PPPoE Work ?,ATU-R,DSLAM,ATM,Aggregator,VPI/VCI 1/1,VPI/VCI 1/33,PADI,PADO,PADR,PADS ( Session ID),LCP/IPCP,RFC 2516 Ethernet traffic is bridged from the PC host to the Access Concentrator,PPPoE,优点 用户广泛接受 互操

50、作的标准 习惯的拨号用户操作界面 缺点 需要客户端软件支持 缺乏足够的带宽用于组播应用，网络瓶颈，建议次采用分布式方式，需配置多个汇聚设备,Routing Implementation,CPE - CPE in Routing Mode, single or multiple subnet behind CPE - Routing Protocol Support Aggregation - Learns Subscriber Routes through Routing Protocol or Static Routes Core - Typically , IP + ATM ( MPLS/

51、VPN),Service Selection,Layer 2 Service Selection with PPP - PTA-MD, PPPoE - Only Single Destination Per PPP session Layer 3 Service Selection with PPP, Bridging & Routing - Web Selection - Multiple Destinations simultaneously even with single PPP session,SSG 服务方式,SSG 支持: - Transparent Passthrough Service - Passthrough Service - Proxy Service - Tunnel (L2TP) Service,SSG 特点,RADIUS Based User/Service Authentication and Accounting Support for Bridged, PPPoA, and PPPoE subscribers Web Based Dashboard Application IP Multicast Support IP Filtering on per-subscriber basis using IOS ACLs Bot