運(yùn)營(yíng)商級(jí)以太網(wǎng)--思科

2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 1 運(yùn)營(yíng)商級(jí)以太網(wǎng) Carrier Ethernet 陳南， 思科系統(tǒng) (中國(guó) )有限公司 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 2 /webmoney Carrier Ethernet的歷史發(fā)展 The History & Drivers Carrier Ethernet的應(yīng)用架構(gòu) The Architecture Carrier Ethernet的相關(guān)技術(shù) The Technologies Carrier Ethernet的部署路線 The Deployment Roadmap Carrier Ethernet的應(yīng)用案例 The Case Study 總結(jié) 議程 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 3 /webmoney Carrier Ethernet的歷史發(fā)展 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 4 /webmoney MEF對(duì) Carrier Ethernet的定義 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 5 /webmoney AT&T的整體企業(yè)客戶網(wǎng)絡(luò)架構(gòu) Inter/Intra LATA and Global Enterprise Services AT&T Global Concept of One IP/MPLS Backbone 美國(guó)本土 LATA-1 美國(guó)本土 LATA-2 客戶 1站點(diǎn) A 客戶 1站點(diǎn) B 客戶 1站點(diǎn) E 全球 AGN Frame Relay/ATM 客戶 1站點(diǎn) D 客戶 1站點(diǎn) C Layer2: OPT-E-MAN Layer3: AVPN/DIA (FTTB以太網(wǎng)接入 ) Layer3: AVPN/DIA (FTTB以太網(wǎng)接入+OPT-E-MAN接入 ) Layer3: AVPN (Frame Relay/ATM接入 ) Internet DIA Router DIA Router DIA Router AVPN PE AVPN PE AVPN PE Intra-LATA QoS Domain 4 Class of Services Layer2 Metro Ethernet Service (E-Line, E-LAN) QoS Domain Intra-LATA Layer3 VPN Intra-LATA QoS Domain 4 Class of Services Layer2 Metro Ethernet Service (E-Line, E-LAN) QoS Domain Intra-LATA Layer3 VPN Inter-LATA and Global Backbone QoS Domain Layer3 IP/MPLS QoS, 4 Class of Services Global Layer3 VPN and DIA Services Inter-LATA and Global Access QoS Domain Layer2 QoS, 4 Class of Services Ethernet/OPT-E-MAN Access Inter-LATA and Global Access QoS Domain Layer2 QoS, 4 Class of Services Ethernet/OPT-E-MAN Access 管理域跨域點(diǎn)：接入域到骨干域，沒有 Inter-AS跨域 VPN QoS域跨域點(diǎn)： Layer2 Ethernet ToS to Layer3 DSCP/EXP E2E SLA保障 E2E Managed Service Domain 客戶 1站點(diǎn) F AVPN PE IPSec Tunnel 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 6 /webmoney IP/MPLS domain . . . . . . 7609 7609 DSLAMs DSLAMs 1-48 Ethernet, MPLS & IP Access GE 10GE xWDM FEEDER LEVEL 70 SGU OPB POP BRAS,PE,RA VoD Server OPB POP OPB POP TV Broadcast Video on Demand Business VPN Residential Internet City 61 7609 7609 7609 METRO LEVEL 32 CORE POPs GE GE GE 7609 10GE City 1 Residential 70% Business 10% Wholesale 20% GE 意大利電信 城域以太網(wǎng)網(wǎng)絡(luò)架構(gòu) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 7 /webmoney 移動(dòng)運(yùn)營(yíng)商中 CE架構(gòu)的應(yīng)用 Converged IP/CE Infrastructure with CEoP IP-BASED SOLUTIONS TO OPTIMIZE GSM/UMTS RAN TRANSPORT ARCHITECTURES 50%+ measured eff gain on GSM and UMTS No change to RAN backhaul design Single IP backhaul network serves 2G/3G/4G RAN backhaul over any network Offload bandwidth hungry HSPA and UMTS data Simple network expansion Intelligent cell site IP enables new revenue generating services Remote cell site management and LAN extension Seamless expansion to 4G Backhaul Transport Optimization over IP Broadband Backhaul and HSDPA Offload Cell Site IP POPs Unified RAN Network CEoP Backhaul Ethernet 4G GSM/GPRS/EDGE T1/E1 UMTS/HSDPA UMTS/HSPA Carrier Ethernet T1/E1 OC3/STM1 Ethernet T1/E1 Ethernet Carrier Ethernet IP 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 8 /webmoney Carrier Ethernet的歷史發(fā)展 小結(jié) 無論是 提供城域內(nèi)的基于 Ethernet UNI的 L2/L3 VPN業(yè)務(wù) 還是對(duì)寬帶的 ATM匯聚的替代 還是對(duì) ATM/FR的傳統(tǒng)業(yè)務(wù)的替代 以及未來移動(dòng)網(wǎng)絡(luò)應(yīng)用與 FMC應(yīng)用 Metro Carrier Ethernet都扮演著越來越重要的角色 隨著網(wǎng)絡(luò)進(jìn)一步融合， Metro Carrier Ethernet將越來越發(fā)揮出在各個(gè)方面的優(yōu)勢(shì)： 靈活的業(yè)務(wù)承載和傳送 較低的成本極高的帶寬 越來越完善的服務(wù)品質(zhì) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 9 /webmoney Carrier Ethernet的應(yīng)用架構(gòu) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 10 /webmoney Carrier Ethernet的典型應(yīng)用 寬帶業(yè)務(wù)匯聚 (Broadband Aggregation) DSLAM, Wi-Fi, PON/FTTH, Ethernet High Bandwidth, Multicast, IPTV Delivery 以太網(wǎng)接入 (Ethernet Access) Ethernet UNI Access Lower Cost, Higher and Flexible Bandwidth, VLAN/Service Multiplexing 以太網(wǎng)傳輸 (Ethernet Transport) Wireless Base Station Backhaul, Data Center Storage/DR Lower Cost, Higher Bandwidth 以太網(wǎng)匯聚 (Ethernet Aggregation) Broadband Ethernet Aggregation Business Ethernet Aggregation Wireless Ethernet Aggregation 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 11 /webmoney 本地網(wǎng)的業(yè)務(wù)與網(wǎng)絡(luò)定位 傳統(tǒng)本地網(wǎng)的定位與不足 傳統(tǒng)本地網(wǎng)的功能 客戶接入 將客戶連接進(jìn)入業(yè)務(wù)宿主網(wǎng)絡(luò) 本地業(yè)務(wù) 完成本地業(yè)務(wù)的交換和本地通信 到骨干網(wǎng)的銜接 通過網(wǎng)關(guān)連接到骨干網(wǎng) 可以滿足 Internet訪問業(yè)務(wù)的要求，但不能滿足新業(yè)務(wù)的要求和已經(jīng)面臨的挑戰(zhàn) 簡(jiǎn)單的接入和管道式的業(yè)務(wù)模式缺少價(jià)值附加值，業(yè)務(wù)能力有限 全開放的網(wǎng)絡(luò)架構(gòu)沒有形成對(duì) OTT運(yùn)營(yíng)商 /移動(dòng)運(yùn)營(yíng)商的競(jìng)爭(zhēng)優(yōu)勢(shì) 面向多張骨干網(wǎng)的銜接不能平滑，網(wǎng)絡(luò)對(duì)接復(fù)雜 接入網(wǎng)絡(luò) 業(yè)務(wù)宿主網(wǎng)絡(luò) 業(yè)務(wù)宿主網(wǎng)絡(luò) 接入網(wǎng)絡(luò) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 12 /webmoney IP NGN中本地網(wǎng)的定位 綜合接入與業(yè)務(wù)智能提供 高帶寬的綜合接入 真正的寬帶接入，為更多的應(yīng)用創(chuàng)造基礎(chǔ)條件 接入實(shí)現(xiàn)多業(yè)務(wù)的復(fù)用，適應(yīng)各種應(yīng)用環(huán)境的多種接入技術(shù)的集成 分級(jí)的網(wǎng)絡(luò)架構(gòu) 通過分級(jí)的架構(gòu)建立有利于運(yùn)營(yíng)商自身的接入資源控制機(jī)制 差分低價(jià)值低服務(wù)品質(zhì)的開放互聯(lián)網(wǎng)與高價(jià)值高服務(wù)品質(zhì)的本地業(yè)務(wù)網(wǎng)絡(luò) 業(yè)務(wù)智能的控制 通過更加智能的邊緣 IP設(shè)備實(shí)現(xiàn)精細(xì)化基于策略的增值業(yè)務(wù)的開發(fā)和部署 互聯(lián)網(wǎng) Internet/OTT 接入網(wǎng)絡(luò) 本地業(yè)務(wù)宿主網(wǎng)絡(luò) IPTV, Local Voice, VAS 長(zhǎng)途業(yè)務(wù)宿主網(wǎng)絡(luò) Long-haul Voice/Transport/ 本地網(wǎng) 骨干網(wǎng) Layer1/2/3 Layer2/3 Layer3 Layer2/3 “智能 ” “智能 ” Metro Carrier Ethernet 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 13 /webmoney IP (FE/GE/10GE/POS) 本地網(wǎng)與骨干網(wǎng)的互聯(lián) 整體架構(gòu) (模塊邏輯圖 ) 商務(wù)客戶 商務(wù)客戶 個(gè)人客戶 個(gè)人客戶 個(gè)人客戶 Metro Carrier Ethernet Layer Native Ethernet, IP/MPLS, EoMPLS, VPLS, H-VPLS, E-OAM, Multicast Routing (Layer2 & Layer3) Legacy (FR, CPoS, ATM.) Ethernet (FE/GE/10GE) China 169 骨干網(wǎng) A/C/I/S Router (Layer3) IP (POS/10GE) Ethernet/IP (GE/10GE) 接入技術(shù) (DSL, Ethernet, PON, Dark Fiber, FR, ATM, Wireless, GSM/3G) Layer1 & Layer2) CNCNet/NGN承載網(wǎng) PE/P Router (Layer2/3) Ethernet/IP (GE/10GE) Ethernet/IP (GE/10GE) 本地網(wǎng) 骨干網(wǎng) IP本地網(wǎng) BRAS, SR, MAN Aggregation/Core Router (Layer2 & Layer3) 本地網(wǎng)業(yè)務(wù)中心 (IPTV, Local Voice, 自主 Portal, Hosted Service, 大客戶服務(wù)中心 ) Ethernet/IP (GE/10GE) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 14 /webmoney 本地網(wǎng)與骨干網(wǎng)的互聯(lián) 整體架構(gòu) (網(wǎng)絡(luò)拓?fù)鋱D ) DSLAM LAN 2G/3G DSLAM LAN WiFi U-PE U-PE N-PE N-PE U-PE U-PE U-PE U-PE BRAS BRAS BRAS SR CR CR DSLAM LAN WiFi U-PE N-PE U-PE U-PE IPTV HE Local Voice BB VAS VIP VAS L3 VPN China 169 骨干網(wǎng) A/C/I/S Router (Layer3) CNCNet/NGN承載網(wǎng) PE/P Router (Layer2/3) IP本地網(wǎng) Metro Carrier Ethernet 本地接入網(wǎng) IP/BGP Link IP/VPN Link IP/Ethernet Layer2 Link Ethernet Layer2 Link Ethernet Layer2 Link Ethernet Layer2 Link Ethernet Link (L2/L3) IP/PPPoE Ethernet Link (L2) 本地網(wǎng)業(yè)務(wù)中心 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 15 /webmoney 對(duì) Carrier Ethernet的典型問題之一 是否真的需要 CE這一層？為什么不直連？ 隨著網(wǎng)絡(luò)向 IP融合的角度不斷前進(jìn)，接入單元將越來越多元化，也將越來越散布 DSLAM, PON, Ethernet Switch, IAD, AG, Wi-Fi AP, 2G/3G/PHS Base Station 沒有 Carrier Ethernet，這些接入單元的回傳 (Backhaul)如何高效率的解決？ 單一接入單元的同一接入線路上承載的業(yè)務(wù)趨于多元化 Broadband Triple Play, DIA, VPN, Tiered Services 沒有 Carrier Ethernet，這些業(yè)務(wù)的復(fù)用和分流如何高效率的實(shí)現(xiàn)？ 網(wǎng)絡(luò)智能邊緣設(shè)備的種類趨于增加 BRAS, VPN PE, IPTV SR, NGN/Voice PE, 3G PE 如何最大效率的連接用戶的業(yè)務(wù)數(shù)據(jù)和這些業(yè)務(wù)設(shè)備？ 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 16 /webmoney 本地網(wǎng)與骨干網(wǎng)的互聯(lián) 整體架構(gòu) 1.商務(wù)客戶的接入以 Ethernet為主，逐步替代原有的 FR/ATM的接入方式 2.接入帶寬應(yīng)可以無縫升級(jí)，按業(yè)務(wù)復(fù)用，并提供接入冗余 1.接入層往上以 Ethernet為主，逐步替代原有的 FR/ATM接口 1.Metro Ethernet層面是一個(gè)大帶寬、廣覆蓋、低成本，以Ethernet技術(shù)結(jié)合 IP/MPLS技術(shù)構(gòu)建的匯聚和業(yè)務(wù)分發(fā)的層次 2.通過 Native Ethernet VLAN/EoMPLS PW/VPLS PW/Multicast Routing/VPN等技術(shù)構(gòu)建若干個(gè)點(diǎn)對(duì)點(diǎn)或點(diǎn)對(duì)多點(diǎn)的 Layer2和 Layer3的業(yè)務(wù)域，彼此邏輯分開 1.IP本地網(wǎng)作為互聯(lián)網(wǎng)業(yè)務(wù)流量的匯聚和轉(zhuǎn)發(fā)，銜接客戶和骨干網(wǎng) 1.個(gè)人客戶的接入以DSL/Ethernet/PON為主要接入手段 2.Wireless作為公眾熱點(diǎn)地區(qū)的接入手段 3.一條物理接入線路復(fù)用多重業(yè)務(wù) 4.帶寬的規(guī)劃要具備前瞻性 5.發(fā)展和規(guī)劃個(gè)人客戶的 CPE網(wǎng)關(guān)設(shè)備，具備更好的業(yè)務(wù)提供能力 1.本地網(wǎng)業(yè)務(wù)中心是從傳統(tǒng)本地網(wǎng)中區(qū)分出來的一個(gè)網(wǎng)絡(luò)業(yè)務(wù)平臺(tái) 2.面向商務(wù)客戶和個(gè)人客戶提供運(yùn)營(yíng)商主導(dǎo)的一些半封閉式的業(yè)務(wù)，包括 Voice, IPTV等和一些Premium的服務(wù)，如面向商客和個(gè)人客戶的增值服務(wù) 3.通過 ME層面的支撐和業(yè)務(wù)分發(fā)，分配更多的本地帶寬資源和更好服務(wù)品質(zhì)給運(yùn)營(yíng)商自主的業(yè)務(wù) 1.IP本地網(wǎng)與 China 169骨干網(wǎng)的對(duì)接是 IP/BGP的，主要交換互聯(lián)網(wǎng)訪問流量 2.集團(tuán)與本地網(wǎng)還可交換網(wǎng)通主導(dǎo)的基于互聯(lián)網(wǎng)平臺(tái)的增值業(yè)務(wù)流 1.對(duì)于客戶有需求直接接入集團(tuán)第二骨干網(wǎng)的長(zhǎng)途業(yè)務(wù)的情況，應(yīng)盡量直接利用本地網(wǎng)的 ME層面實(shí)現(xiàn)接入 (本地網(wǎng)做 L2) 2.對(duì)于在本地和長(zhǎng)途都有業(yè)務(wù)的情況可分別接入或通過和本地網(wǎng)業(yè)務(wù)中心的的對(duì)接實(shí)現(xiàn) (L2/L3) 3.應(yīng)盡量減少和避免跨域 VPN的情況以清晰分工界面和簡(jiǎn)化故障排除 1.Metro Ethernet層面的建設(shè)是本地網(wǎng)實(shí)現(xiàn)多重業(yè)務(wù)承載的基礎(chǔ)和重點(diǎn) 2.結(jié)合 L2/L3 VPN技術(shù)實(shí)現(xiàn)多個(gè)相互獨(dú)立又互通有無的邏輯業(yè)務(wù)域 3.在本地網(wǎng)內(nèi)區(qū)分出本地網(wǎng)的業(yè)務(wù)中心平臺(tái)，結(jié)合 ME實(shí)現(xiàn)高附加值業(yè)務(wù)的快速開發(fā)和部署 4.與長(zhǎng)途骨干網(wǎng)的對(duì)接應(yīng)結(jié)合 L2/L3技術(shù)，可清晰分工界面，簡(jiǎn)化技術(shù)部署和維護(hù)難度，提高服務(wù)質(zhì)量 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 17 /webmoney 對(duì) Carrier Ethernet的典型問題之二 Carrier Ethernet成本是不是很貴？ 可以用 Ethernet端口的價(jià)格與 SDH傳輸系統(tǒng)的列表價(jià)格進(jìn)行一下簡(jiǎn)單的比較 10G端口 傳輸 (OC192)為 $75,000/10G, 業(yè)務(wù)增強(qiáng)以太網(wǎng) (10GE)為 $75,000/10G, 標(biāo)準(zhǔn)以太網(wǎng)為 $10,500/10G 1G端口 MSTP(GE)為 $21,250/Gig, 業(yè)務(wù)增強(qiáng)以太網(wǎng) (1GE)為 6,000/Gig, 標(biāo)準(zhǔn)以太網(wǎng)為 $1,312/Gig 純粹的 SDH POS傳送效率高于 Ethernet，但 Carrier Ethernet的復(fù)用效率更高 IP/Carrier Ethernet的上層業(yè)務(wù)能力更強(qiáng) (L1/L2/L3) 向未來全 IP/L3趨勢(shì)的演進(jìn)更平滑 Cisco ONS 15454 OC-192/STM-64 XFP-Based Optics Card $75,000 Cisco ONS 15454 2-Port Gigabit Ethernet Module $42,500 Cisco 7600 Ethernet Services 2x10G Line Card $150,000 Cisco 7600 4-Port 10 Gigabit Ethernet Module $42,000 Cisco 7600 Ethernet Services 20x1G Line Card $120,000 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 18 /webmoney Carrier Ethernet的相關(guān)技術(shù) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 19 /webmoney 對(duì) Carrier Ethernet的典型問題之三 Carrier Ethernet技術(shù)是不是非常復(fù)雜？ 聽到的關(guān)于 CE的各種新名詞和新技術(shù)以及標(biāo)準(zhǔn)，看上去很復(fù)雜 EoMPLS, VPLS, H-VPLS, REP, MSTP, RPR, RRR, PBB, PBT, T-MPLS QinQ, 選擇 QinQ, 靈活 QinQ, MAC-in-MAC, 業(yè)務(wù)選擇 HA, QoS, H-QoS, E-OAM, CFM 需要重新關(guān)注到本質(zhì)性的 5個(gè) Carrier Ethernet要素： 1. Standardized Services P2P? P2MP/MP2MP? 2. Scalability VLAN, Service Instance, MAC 3. Service Management Control/Management Plane, STP? MPLS? NMS? 4. Reliability 5. QoS 這些技術(shù)改進(jìn)都體現(xiàn)在兩個(gè)地方： CE網(wǎng)絡(luò)的邊界技術(shù) (Edge)和 CE網(wǎng)絡(luò)的傳送技術(shù) (Core) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 20 /webmoney Carrier Ethernet的關(guān)鍵技術(shù)革新 傳統(tǒng)以太網(wǎng)技術(shù)的不足 傳統(tǒng)以太網(wǎng)技術(shù)在多個(gè)方面難以滿足運(yùn)營(yíng)商級(jí)的要求 靈活的多業(yè)務(wù)的識(shí)別與映射 Layer2 與 Layer3的流量工程 網(wǎng)絡(luò)系統(tǒng)可擴(kuò)展性與穩(wěn)定性 BD ATM / FR PVC / DLCI EoMPLS PW BD VLANs L2 interworking Bridging (vlan aware and vlan blind) VLANs Sub-i/f Sub-i/f Physical Port Sub-i/f Route (L3) Sub-i/f Sub-i/f Sub-i/f 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 21 /webmoney Carrier Ethernet的關(guān)鍵技術(shù)革新 EFP&EVC ATM / FR legacy service instance PVC / DLCI P2P service instance BD I/F L3 service instance EFPs L2 inter-working Bridging Ethernet access to L3VPN/IP EFPs Physical Port BD BD L2 VFI MP2MP L2 service instance EFP EFP Ethernet Flow Point EVC Ethernet Virtual Circuit EFP: - 802.1Q - QinQ - Pseudowire / VPLS - L3 VPN - IP Sessions - MAC Address EFP靈活QinQ處理 EVC業(yè)務(wù)映射 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 22 /webmoney L3 EoMPLS H-VPLS L2, Point to Point L2, Bridged L2/L3 integration ISG Subscriber Session * H-QoS per EFP 靈活 VLAN處 理 1:1, 1:2 2:1, 2:2 Push/Pop (1/2) 802.1ah * (MAC-in-MAC) DPI Security OAM SBC Video 個(gè)人客戶 STB 商務(wù)客戶 Corporate 個(gè)人客戶 STB 商務(wù)客戶 Corporate Carrier Ethernet的關(guān)鍵技術(shù)革新 新的業(yè)務(wù)接入與匯聚模式 個(gè)人寬帶上網(wǎng)業(yè)務(wù) 商務(wù)客戶專線業(yè)務(wù) 商務(wù)客戶 L2 VPN業(yè)務(wù) 商務(wù)客戶 L3 VPN業(yè)務(wù) 個(gè)人客戶綜合接入 商務(wù)客戶綜合接入 靈活的業(yè)務(wù)識(shí)別與映射 附加的多業(yè)務(wù)特性提供 安全，業(yè)務(wù)控制，視頻優(yōu)化 每用戶 /業(yè)務(wù)邏輯 的品質(zhì)保障 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 23 /webmoney 融合 統(tǒng)一的光通訊技術(shù)作為底層的傳輸，本地或長(zhǎng)途 上層全 IP組網(wǎng)，通過 IP/MPLS技術(shù)統(tǒng)一提供 L1/L2/L3的業(yè)務(wù) 混合 統(tǒng)一的光傳輸層面 上層分成兩部分，靠近客戶邊緣通過以太網(wǎng)技術(shù)組網(wǎng)，核心部分通過IP/MPLS組網(wǎng)，合作提供端到端的L1/L2/L3業(yè)務(wù) 重疊 統(tǒng)一的光傳輸層面之上疊加一層Packet Transport，提供 L1/L2的業(yè)務(wù) 只在需要的地方疊加部署路由器提供L3業(yè)務(wù) Optical Layer L1/L2/L3業(yè)務(wù) Packet Transport Optical Layer L3業(yè)務(wù) Optical Layer L1/L2/L3業(yè)務(wù) 多業(yè)務(wù) IP網(wǎng)可能的架構(gòu) IP/MPLS L2/3 VPN CEoP SDH/xWDM SDH/xWDM SDH/xWDM Ethernet/1ah/1ad PBT/T-MPLS Ethernet/1ah/1ad PBT/T-MPLS IP/MPLS IP/MPLS L2/3 VPN CEoP L1/L2業(yè)務(wù) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 24 /webmoney 目前典型的網(wǎng)絡(luò)架構(gòu)和多業(yè)務(wù)架構(gòu)的映射 Access Node IP Provider Edge IP Provider Core DSLAM Ethernet Residentail BRAS Business PE/SR CORE ROUTER 接入?yún)R聚網(wǎng)絡(luò) 城域網(wǎng) /本地網(wǎng) 省干網(wǎng) /國(guó)干網(wǎng) Optical Layer Ethernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS) IP/MPLS (CEoP/L2/L3 VPN) Optical Layer Ethernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS) IP/MPLS (CEoP/L2/L3 VPN) Optical Layer IP/MPLS (CEoP/L2/L3 VPN) IP/MPLS (CEoP/L2/L3 VPN) 融合 混合 重疊 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 25 /webmoney 幾種架構(gòu)的對(duì)比和討論 重疊模式 重疊模式的特點(diǎn)是在 Optical層面再疊加一層 Packet Transport，提供 L1/L2的業(yè)務(wù)，比 Optical直接提供有更細(xì)的帶寬顆粒度和更高的統(tǒng)計(jì)復(fù)用效率，對(duì)上有的技術(shù) (T-MPLS)遠(yuǎn)景上可以融合 MPLS控制平面與 IP層面的設(shè)備互動(dòng)，形成某種程度的融合，但真正 3層的業(yè)務(wù)，比如 Internet訪問還需要3層設(shè)備 回到了最初 ATM和 IP重疊的模式， IP設(shè)備都是相互孤立的孤島，孤島之間通過 L2電路直接互通 只有純粹的 2層業(yè)務(wù)不需要 3層設(shè)備配置相應(yīng)的端口，所有 3層業(yè)務(wù)還需要配置相應(yīng)的 L3設(shè)備和 L3端口，核算一下實(shí)際的流量組成，所能節(jié)省的成本是非常有限的，而且網(wǎng)絡(luò)的復(fù)雜度其實(shí)有增無減 Access Node IP Provider Edge IP Provider Core DSLAM Ethernet Residentail BRAS Business PE/SR CORE ROUTER 接入?yún)R聚網(wǎng)絡(luò) 城域網(wǎng) /本地網(wǎng) 省干網(wǎng) /國(guó)干網(wǎng) Optical Layer Ethernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS) IP/MPLS (CEoP/L2/L3 VPN) IP/MPLS (CEoP/L2/L3 VPN) 重疊 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 26 /webmoney 幾種架構(gòu)的對(duì)比和討論 混合模式 混合模式是目前的現(xiàn)狀，只是在匯聚網(wǎng)中采用的技術(shù)是多樣化的，有標(biāo)準(zhǔn) Ethernet，802.1ad/QinQ技術(shù)等，新提出來的還有 EoMPLS/VPLS技術(shù)，以及 802.1ah(Mac-in-Mac)等，當(dāng)然PBT/T-MPLS也是可以部署和應(yīng)用的 比較統(tǒng)一的認(rèn)識(shí)是在匯聚網(wǎng)內(nèi)，對(duì)于 Triple Play業(yè)務(wù)來說，標(biāo)準(zhǔn)以太網(wǎng)是不能滿足需要的，主要體現(xiàn)在這幾個(gè)方面： 標(biāo)準(zhǔn)以太網(wǎng)是多點(diǎn)訪問的 LAN技術(shù)，流量工程是很難作的，包括單一流和匯聚流 控制平面是 SPT，無論收斂時(shí)間和收斂行為都不是可控的，存在環(huán)路和廣播風(fēng)暴問題 存在 MAC地址和 VLAN的擴(kuò)展性問題 Access Node IP Provider Edge IP Provider Core DSLAM Ethernet Residentail BRAS Business PE/SR CORE ROUTER 接入?yún)R聚網(wǎng)絡(luò) 城域網(wǎng) /本地網(wǎng) 省干網(wǎng) /國(guó)干網(wǎng) Optical Layer Ethernet (802.1ah/1ad) / Packet Transport (PBT/T-MPLS) IP/MPLS (CEoP/L2/L3 VPN) 混合 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 27 /webmoney 標(biāo)準(zhǔn)以太網(wǎng)的改進(jìn) 由于上述的缺點(diǎn)，一些新部署方式提出來對(duì)其進(jìn)行優(yōu)化，包括： 每用戶每 VLAN或點(diǎn)對(duì)點(diǎn)以太網(wǎng)，使得匯聚網(wǎng)的面向接入節(jié)點(diǎn)的入口可以通過唯一的內(nèi)外層 VLAN組合來標(biāo)識(shí)一個(gè)客戶，同時(shí)通過部署 QinQ來提高 VLAN的擴(kuò)展性，解決 VLAN ID不足的問題 VLAN也可以提供多業(yè)務(wù)區(qū)分，提供不同的邏輯拓?fù)浣o不同的業(yè)務(wù) 樹形拓?fù)?，從匯聚面向接入的入口到匯聚面向 IP的出口好像是點(diǎn)對(duì)點(diǎn)線路一樣沒有冗余線路設(shè)計(jì)，犧牲冗余來避免環(huán)路和生成樹行為 MAC-in-MAC (802.1ah)技術(shù)的引用可以進(jìn)一步可以緩解 VLAN-ID和 MAC地址空間的壓力，但其要求邊緣必須是 QinQ域，意味著只適合大型的匯聚域部署 E-OAM相關(guān)標(biāo)準(zhǔn)的提出增強(qiáng)網(wǎng)絡(luò)的可管理性 盡管有所改進(jìn)，但是一些關(guān)鍵問題和要求還不能解決和滿足 網(wǎng)絡(luò)的可用性問題和細(xì)顆粒度的流量工程問題 網(wǎng)絡(luò)規(guī)模的擴(kuò)展性問題還是沒有解決，當(dāng)在大型的城市進(jìn)行多業(yè)務(wù)邏輯拓?fù)涮峁r(shí)仍然是捉襟見肘的 業(yè)務(wù)智能與用戶識(shí)別問題不能解決，可參考的參數(shù)只有 L2的少量信息 DSLAM Ethernet Residentail BRAS Business PE/SR 接入?yún)R聚網(wǎng)絡(luò) IP/Layer3 1q/1ad/1ah 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 28 /webmoney 標(biāo)準(zhǔn)以太網(wǎng)的改進(jìn) REP (Resilience Ethernet Protocol) 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 forwarding A B A B 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 29 /webmoney Segment 2 Segment 1 Segment 3 Segment 3 Segment 1 REP Segment Alternate (Blocking) Port Edge Port Segment 2 A D B C E F G H I J K L A B C D E F G H I J K L M Bridged domain 標(biāo)準(zhǔn)以太網(wǎng)的改進(jìn) REP (Resilience Ethernet Protocol) 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 30 /webmoney 標(biāo)準(zhǔn)以太網(wǎng)的改進(jìn) REP (Resilience Ethernet Protocol) When wrapped into a ring, the REP segment can also provide redundant connectivity between any two switches A combination of rings and segments allows creating almost any kind of network. A B A B The 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. B A x B A x Bridged domain Bridged domain Host Redundancy Link Redundancy 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 31 /webmoney 標(biāo)準(zhǔn)以太網(wǎng)的改進(jìn) REP的快速收斂 Test Description 16 Nodes 3750ME 16 Nodes ME 3400 32 Nodes ME 3400 Interface shutdown Fiber pull Interface shutdown Fiber pull Interface shutdown Fiber pull 5 VLANs 2 MAC per VLAN Total MAC learned= 10 22.8 ms 21.2 ms 18.1 ms 19.5 ms 31.9 ms 35.6 ms 40 VLANs 2 MAC per VLAN Total MAC learned = 80 27.3 ms 26.7 ms 23.8 ms 17.8 ms 34.1 ms 36.5 ms 200 VLANs 2 MAC per VLAN Total MAC learned = 400 35.6 ms 42.2 ms 16.3 ms 17.9 ms 57.1 ms 50.0 ms 400 VLANs 2 MAC per VLAN Total MAC learned = 800 51.0 ms 67.5 ms 18.8 ms 19.4 ms 93.4 ms 55.4 ms 800 VLANs 2 MAC per VLAN Total MAC learned = 1600 72.8 ms 114.1 ms 19.8 ms 18.3 ms 100.5 ms 112.8 ms 996 VLANs 2 MAC per VLAN Total MAC learned = 1992 89.3 ms 128.5 ms 20.6 ms 20.1 ms 113.3 ms 75.9 ms 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 32 /webmoney 幾種架構(gòu)的對(duì)比和討論 融合模式 融合模式是端到端的 IP/MPLS 在一個(gè) IP基礎(chǔ)架構(gòu)上可再區(qū)分出匯聚網(wǎng)、本地網(wǎng)和長(zhǎng)途骨干網(wǎng)，不同業(yè)務(wù)的架構(gòu)可不同 或甚至不區(qū)分匯聚網(wǎng)和本地網(wǎng)，將 IP智能邊緣推送到接入邊緣 是否存在匯聚網(wǎng)絡(luò)，取決于 IP智能邊緣設(shè)備的位置，匯聚網(wǎng)本身可以是 L2的，也可以是 L3的 所有的 L1/L2/L3業(yè)務(wù)都是統(tǒng)一來提供的 可以是構(gòu)造出虛擬的 P2P的 L1/L2電路， MP2MP的 L2或 L3域 Access Node IP Provider Edge IP Provider Core DSLAM Ethernet Residentail BRAS Business PE/SR CORE ROUTER 接入?yún)R聚網(wǎng)絡(luò) 城域網(wǎng) /本地網(wǎng) 省干網(wǎng) /國(guó)干網(wǎng) Optical Layer IP/MPLS (CEoP/L2/L3 VPN) 融合 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 33 /webmoney MPLS對(duì)以太網(wǎng)的改進(jìn) 匯聚網(wǎng)仍然以 L2的形態(tài)存在，以 IP/MPLS技術(shù)模擬以太網(wǎng)，通過 EoMPLS技術(shù)提供點(diǎn)對(duì)點(diǎn)以太網(wǎng)電路，通過 VPLS提供多點(diǎn)對(duì)多點(diǎn)的以太網(wǎng)虛擬域，控制平面是 IP/MPLS，技術(shù)本身是很成熟的 L3的基礎(chǔ)架構(gòu)提供了網(wǎng)絡(luò)的高可用性， 2層電路或 2層多點(diǎn)互聯(lián)域的業(yè)務(wù)高可用性可以通過 IP UC/MC的 FC/TE， PW Redundancy等三層技術(shù)提供，涵蓋了所有可能的故障 L3網(wǎng)絡(luò)的基礎(chǔ)架構(gòu)還確保了大規(guī)模部署的可擴(kuò)展性和服務(wù)區(qū)域的可延伸性 流量工程的能力非常強(qiáng)，可以再匯聚網(wǎng)的入口，也可以在匯聚網(wǎng)的核心，對(duì)單一的客戶或單一的業(yè)務(wù)流這樣的顆粒度進(jìn)行流量走向的調(diào)度或流量大小的限制以及 QoS調(diào)度 天然具備 L3的業(yè)務(wù)智能的條件，可在網(wǎng)絡(luò)的最邊緣接入點(diǎn)或邏輯域的邊界識(shí)別業(yè)務(wù)和客戶 目前通過 L2/L3，未來可通過 L3-L7 DSLAM Ethernet Residentail BRAS Business PE/SR 接入?yún)R聚網(wǎng)絡(luò) IP/Layer3 MPLS 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 34 /webmoney 三層匯聚網(wǎng) /三層到邊緣 匯聚網(wǎng)本身也可以是以三層的方式構(gòu)建的，即為多業(yè)務(wù)構(gòu)建多個(gè)三層的 VPN域用于承載多業(yè)務(wù)，包括面向個(gè)人的 Triple Play和面向商客的 VPN業(yè)務(wù) 也可以是 IP智能邊緣設(shè)備， BRAS或 PE/SR部署到邊緣，形成 Fully Distributed的架構(gòu) L3的優(yōu)勢(shì)在于網(wǎng)絡(luò)的擴(kuò)展、維護(hù)和建設(shè)都比較簡(jiǎn)單，擴(kuò)展性、可用性和業(yè)務(wù)能力都很高，對(duì)組播的支持也非常好，這在大規(guī)模的 Video業(yè)務(wù)部署時(shí)至關(guān)重要，此外 L3的智能更多 L3也有一些需要注意的地方： 3層智能對(duì)于網(wǎng)絡(luò)設(shè)備的壓力可能更大，需要適當(dāng)?shù)姆植际降牟渴鹉Ｊ?流量一旦進(jìn)入 L3域就會(huì)天然的互通，需要在第一個(gè) L3入口處就需要完成認(rèn)證、授權(quán)和計(jì)費(fèi)功能 DSLAM Ethernet Residentail BRAS Business PE/SR IP/Layer3 IP/MPLS Business PE/SR Residentail BRAS 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 35 /webmoney Carrier Ethernet的關(guān)鍵技術(shù) 小結(jié) Ethernet Flow Point 更靈活的流識(shí)別與分類和業(yè)務(wù)復(fù)用 Ethernet Virtual Circuit 標(biāo)準(zhǔn)化 P2P/MP2MP業(yè)務(wù)連接 更擴(kuò)展的 VLAN空間和業(yè)務(wù)服務(wù)能力 通過 IP/MPLS實(shí)現(xiàn)的更高的業(yè)務(wù)可靠性 E-OAM 端到端的運(yùn)營(yíng)、管理和維護(hù)機(jī)制 QoS IP應(yīng)用友好 Layer2/3技術(shù)的無縫結(jié)合 更有效的服務(wù) IP及上層應(yīng)用 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 36 /webmoney Carrier Ethernet的部署路線圖 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 37 /webmoney 對(duì) Carrier Ethernet的典型問題之四 Carrier Ethernet建設(shè)的切入點(diǎn)是什么？ 寬帶 Triple Play業(yè)務(wù)匯聚 GE DSLAM匯聚 IPTV, High Bandwidth, High Quality 城域內(nèi)的 L2業(yè)務(wù)與傳統(tǒng) ATM/FR業(yè)務(wù)替代 Ethernet Access/UNI Ethernet Transport 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 38 /webmoney 對(duì) Carrier Ethernet的典型問題之五 Carrier Ethernet未來發(fā)展趨勢(shì)是什么？ 未來網(wǎng)絡(luò)發(fā)展的趨勢(shì)是三層智能進(jìn)一步下移 目前已經(jīng)證明了對(duì)于 Video業(yè)務(wù)三層到邊緣是具備明顯優(yōu)勢(shì)的 未來寬帶接入的業(yè)務(wù)智能也會(huì)部分甚至全部的下移 但對(duì)于 Ethernet Transport/Backhaul的應(yīng)用來說則沒有明確的下移需求和必要 隨著多業(yè)務(wù)在 IP網(wǎng)的融合程度不斷提高， Carrier Ethernet在業(yè)務(wù)能力，網(wǎng)絡(luò)架構(gòu)的靈活性以及總體成本方面的價(jià)值將越來越明顯的體現(xiàn)出來 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 39 /webmoney Carrier Ethernet的部署路線圖 Ethernet Access Domain-3 MPLS Domain Ethernet Access Domain-1 Ethernet Access Domain-2 Ethernet Access - 3 MPLS Domain Ethernet Access - 2 Ethernet Access - 1 階段 1 IPTV/BB Aggregation, Video L3 to Edge Legacy Business Service Upgrade (FR/ATM) 階段 Ph2 Business Service Expansion (SDH-based VPN Replacement, Metro Transport) NGN-AG/3G Backhaul 階段 Ph3 BB L3 to Edge 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 40 /webmoney Carrier Ethernet的應(yīng)用案例 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 41 /webmoney 2006 2005 2004 2007 Launch on a full ATM-based architecture Limited deployment Large deployment on top of DAMBACK architecture Extended DAMBACK deployment and Triple play services migration from ATM network Initial PSTN services migration FT NExT Video Services ONLY Triple Play Full NGN Franch Telecom Triple Play Service Roadmap 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 42 /webmoney BRAS IP/MPLS National BB ATM Backhaul Metro Ethernet ATM National BB Franch Telecom The Big Picture 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 43 /webmoney RBCI ATM ATM NM NM NB NB NE NE NE Focus on that 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 44 /webmoney Last Mile provisioning PVC For TV Broadcast PVC For IGMP PVC For VOD/DHCP H.323 WAN DHCP Client N A T LAN DHCP Server PVC For Internet PVC For VISIO PVC For VOICE Multi-VC model fully applied Livebox (SAGEM/THOMSON) is acting as both: -A switch for TV services -A router for others services Mix of UBR, CBR and VBR for ATM COS in Local Loop. This ATM Class Of service are different in the backhaul 2006 Cisco Sy stems, Inc. All rights reserv ed. Cisco Conf idential Presentation_ID 45 /webmoney RBCI ATM ATM NM NM NB NB NE NE NE Focus on that The DSLAM has the following abilities: - Multicast IGMP proxy - Cross-connect multiple PVCs to one VLAN - DHCP relay (per vlan) Convert broadcast to unicast Insert own IP address as “GIADDR” Insert “NAS-id/SLOT-id/PORT-id/VPI-id/VCI-id” into option field 82 Send 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 Sy stems, Inc. All rights reserv ed. Cisco Conf iden