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寬頻電信乙太網路之技術與趨勢

寬頻電信乙太網路之技術與趨勢 . CCL N000 劉炳傳. outline. Introduction Metro Ethernet Forum Carrier Class Ethernet Ethernet Demarcation Summary. Ethernet. Most popular packet-switched LAN technology Bus and Star topologies Bandwidths: 10Mbps, 100Mbps, 1Gbps, 10Gbps CSMA/CD CS = carrier sense

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寬頻電信乙太網路之技術與趨勢

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  1. 寬頻電信乙太網路之技術與趨勢 CCL N000 劉炳傳 CCL Confidential

  2. outline • Introduction • Metro Ethernet Forum • Carrier Class Ethernet • Ethernet Demarcation • Summary CCL Confidential

  3. Ethernet • Most popular packet-switched LAN technology • Bus and Star topologies • Bandwidths: 10Mbps, 100Mbps, 1Gbps, 10Gbps • CSMA/CD • CS = carrier sense • Send only if medium is idle • MA = multiple access • CD = collision detection • Stop sending immediately if collision is detected • Exponential Backoff CCL Confidential

  4. Why did Ethernet Win? • Price • Performance • Availability • Ease of use • Scalability CCL Confidential

  5. IDC, 2004 ($m) Worldwide Ethernet based Services Market Size Telecom Equipment for 2005 (HR 2004) Ethernet Services 2003-07 (IDC) CCL Confidential

  6. Broadband Service Trends Source: Infonetics – April 2005 CCL Confidential

  7. Wireless Subscribers Source: IDC, Yankee, EMC CCL Confidential

  8. Broadband Subscribers Source: IDC, Yankee, EMC CCL Confidential

  9. Security Reliability Cost… Metro Ethernet Ntwk Video HeadEnds VoD BRAS…ISP TV Internet Voice Gateways Voice Corporate VPN VPN neta VPN netb University VPN … and by the way … • . . . Customers want all of these, delivered via a single, converged network…. • Enterprise & residential… • Best-effort & bullet proof... • Video, voice & data… • Mobile & fixed … … via the same Ethernet-enabled infrastructure CCL Confidential

  10. Hard QoS and Traffic Engineering • Better bandwidth utilization/Scalability • Protection Switching (50ms) • OAM functions and TDM Support • Any-to-Any VPN services • Multicast support with Hard QoS • Carries all applications • Internet Access • IP VPN service IP IP Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP IP IP IP IP IP The New Network Architecture Transport Business Subscriber Service Provider Nationwide/Global Carrier Ethernet Residential Subscriber Metro Carrier Ethernet CCL Confidential

  11. Video Source Video Source A New Network Architecture HD TV TVoD, VoD Gaming Business Backup, ERP Voice/Video Telephony Voice gateway E-Line and E-LAN service Carrier Ethernet Business Broadband Internet Broadband Wireless Wireless data/video Network in Motion Residential Triple-Play FTTx and DSLAM Backhaul CCL Confidential

  12. What’s Carrier Ethernet • Protection • 50ms Protection • End to End Path Protection • Aggregated Line & Node Protection • Scalability • Services and Bandwidth • 100,000’s of EVC’s • From Mbps to x10Gbps • Customer data integrity • Hard QoS • Guaranteed end to end SLA • End to End CIR and EIR • Business, Mobile, Residential Carrier Ethernet • Service • Management • Fast service creation • Carrier class OAM capabilities • Customer Network Management (CNM) • TDM Support • Seamless integration of TDM • Circuit Emulation Services • Support existing voice applications CCL Confidential

  13. What is the MEF? • The Metro Ethernet Forum is a non-profit organization chartered with the mission of accelerating Worldwide Adoption of Carrier class Ethernet Networks and Services. • The Forum is comprised of leading service providers, major incumbent local exchange carriers, top network equipment vendors, test equipment vendors and other prominent networking companies that share an interest in metro Ethernet. • The MEF has over 65 members as of March 2005. CCL Confidential

  14. AboveNet Actelis Adva Optical Networks Agilent Technologies Alcatel Altera AMCC Atrica AT&T Axerra Networks Axxessit Bell South British Telecom Ciena Corp. Cisco Systems Colt Telecommunications Corrigent Systems Covaro Networks Diatem Ericsson Extreme Networks Foundry Networks France Telecom R&D LLC Fujitsu Network Communications FutureSoft Hammerhead Systems Harbour Networks Hatteras Networks, Inc. Huawei Tech Co. Ltd. Industrial Technology Research Institute Iometrix Iskratel IXIA Juniper Networks KDDI R&D Laboratories, Inc. MEF Member Listas of June 6, 05 CCL Confidential

  15. Lucent Technologies Luminous Networks, Inc. Mahi Networks Marconi Communications Marvell Semiconductor Met-Net Communications Metrobility Optical Native Networks Nortel Networks Corp. NTT Advanced Technology Corp. OmniTron Systems Technology PMC-Sierra Qwest Communications RAD Data Communications Raza Microelectronics Redux Communications Riverstone Networks SBC Communications, Inc. Shenick Siemens AG SII Network Systems, Inc Spirent Communications Sunrise Telecom Telcordia Technologies Telco Systems TeliaSonera AB Tellabs Terachip Tpack A/S T-Systems Transmode Systems Transwitch UNH- InterOperability Lab Verizon Communications World Wide Packets Zarlink Semiconductor ZTE Corporation MEF Member Listas of June 6, 05 CCL Confidential

  16. Carrier Ethernet Standards • Protection • MEF 2 – Ethernet Protection • MEF 4 – Architecture Framework • IETF – MPLS Fast Reroute • Scalability • MEF 9 – UNI Testing • MEF 11 – UNI Framework • MEF UNI I IA • MEF UNI Type II • MEF Ethernet Aggregation • IEEE 802.1 • Hard QoS • MEF 6 – Service Definition • MEF 10 – Service Attributes • MEF Service Attributes II • MEF Service Attributes Testing • MEF Service Definition II Carrier Ethernet • Service • Management • MEF 7 – EMS and NMS Info Model • MEF OAM Framework & Requirements • MEF Performance Monitoring • MEF NE Management Requirements • IEEE 802.1, ITU • TDM Support • MEF 3 – CES Framework • MEF 8 – CES Implementation • MEF TDM Testing CCL Confidential

  17. Carrier Ethernet Drivers • Business • Ultimate Connectivity • Data Center Consolidation • Gigabit connectivity between businesses • Storage and disaster recovery • Guaranteed rate multi-megabit Internet access • Video conferencing & broadcast • Business telephony • Mobile • Wireless backhaul • Wi-Fi Access delivery • WiMAX infrastructure • 3G and beyond wireless • Next gen data services • High resolution photo • Wireless video • Gaming • Digital TV • Residential • Triple Play with IPTV • 100’s of TV channels • Video on demand • Video recording/playback • Interactive video apps • Multi-megabit Internet access • Remote learning • Gaming CCL Confidential

  18. Metro Carrier Ethernet Metro Carrier Ethernet Metro Carrier Ethernet IP Supporting Business Services • Any-to-any Layer 2 VPN to interconnect multiple locations transparently and effectively (with high and guaranteed bandwidth) • Supporting the convergence of data and voice Branch ISP Internet Nationwide/Global Carrier Ethernet E-LAN IP HQ Branch Branch Branch CCL Confidential

  19. Metro Carrier Ethernet Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP IP IP IP IP Network Using Carrier Ethernet as the Transport Layer IP Supporting Transport for IP Network • E-LAN connections among routers • Any logical IP topology, multiple EVC’s of a single physical interface • It supports all business IP services, from IP VPN to Internet access R R Nationwide/Global Carrier Ethernet R R R R IP IP R R R IP R R R CCL Confidential

  20. Video Source Video Source Metro Carrier Ethernet Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP IP Supporting TV Distribution Service 1. Multicast tree(s) is(are) established with QoS guaranteed 2. Subscribers (the Set-Top-Box) sends request for a channel 3. Carrier Ethernet filters, only replicates and forwards the requested channel to the subscribers 4. Video source protection and network protection are set up automatically upon requirement IP DSLAM L2 DSLAM Nationwide/Global Carrier Ethernet Subscribers IP DSLAM IP DSLAM L2 DSLAM IP DSLAM L2 DSLAM CCL Confidential

  21. Resource & Subscriber Manager (RSM) Metro Carrier Ethernet IP VoD server IP IP Command Server Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP IP IP Supporting VoD Service 1. An E-LAN connection is established between DSLAMs and VoD servers 2. Subscribers (the Set-Top-Box) sends request to RSM for a movie 3. RSM finds/informs the best VoD server, acknowledge subscribers of such 4. The subscriber establishes RTP and RTSP session with VoD and Command server respectively IP DSLAM E-LAN L2 DSLAM Nationwide/Global Carrier Ethernet Subscribers IP DSLAM IP DSLAM L2 DSLAM IP DSLAM L2 DSLAM CCL Confidential

  22. Location Server Metro Carrier Ethernet IP WAN SIP Proxy Server IP IP IP Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP Supporting VoIP Service 1. An E-LAN connection is established between WAN routers to build an IP WAN 2. An E-LAN connection is established between the DSLAMs and the IP PoP in each metro 3. Caller contacts the SIP Proxy server in order to find the IP address of the called party 4. Caller establishes RTP session with the called party through E-LAN connection L2 DSLAM L2 DSLAM Nationwide/Global Carrier Ethernet E-LAN Subscribers IP DSLAM L2 DSLAM L2 DSLAM IP DSLAM L2 DSLAM CCL Confidential

  23. 3G SGSN IP IP IP IP 3G SGSN 3G SGSN 3G SGSN Carrier Ethernet for 3G/UMTS Backhaul • Guaranteed QoS • Flexible SLA portfolios for different users and services • Flexible bandwidth growth without network upgrade • Efficient network for multimedia applications (P2P, P2MP, MP2MP) • Secure connectivity for corporate and consumer users • Seamless integration with the wireline transport network – both Ethernet and TDM IP Carrier Ethernet CCL Confidential

  24. Video Source Video Source Metro Carrier Ethernet Metro Carrier Ethernet Metro Carrier Ethernet IP IP IP IP IP IP Supporting Residential Triple Play Services • Voice, video & data distribution & backhaul IP DSLAM L2 DSLAM Nationwide/Global Carrier Ethernet Subscribers IP DSLAM IP DSLAM L2 DSLAM IP DSLAM L2 DSLAM CCL Confidential

  25. Service Provider Benefits • Greater Revenue Potential - Granular Bandwidth • Multiple Revenue Streams from Single Interface • Internet Access (E-Line) • Ethernet Virtual Private Line (E-Line) • Virtual Private LAN Service (E-LAN) • BTV and VoD (Triple Play) • VAS Enabled (VoIP, L3VPN, TDM/CES etc.) • Lower Capital Costs • Lower OPEX Costs • Higher Customer Retention CCL Confidential

  26. Ethernet Demarcation CCL Confidential

  27. What is Ethernet Demarcation? Ethernet Demarcation • Necessary at carrier to customer interface (UNI) • Provides separation between carrier WAN and enterprise LAN • Enables testing and monitoring of both LAN and WAN • IEEE 802.1aj standard started Mar ‘05 UNI UNI Cust. LAN Network Cust. LAN Network Carrier WAN Network 100FX 100FX Carrier NW Cust. Eqpmnt. Media Convrtr. Media Convrtr. Media Convrtr. Carrier Edge Media Convrtr. Carrier Edge Cust. Eqpmnt. UNI 100FX 100BT 100BT Demarcation Device CCL Confidential

  28. Ethernet 10/100BT Demarcation point: media converter, L2 switch, ADM, and now dedicated devices Legacy Services (eg Frame Relay) Demarcation point: Smartjack®, CSU/DSU or NTE. Ethernet Demarcation: History Repeats Itself Demarcation Point Demarcation Point Carrier Network Customer Network Customer Network Carrier Network 100BT 100BT E1/T1 V.35 EoX Switch/Router ADM, Modem or Media converter Smartjack, CSU/DSU or NTE Ethernet Demarcation Device Switch/Router ADM or Modem Demarcation is critical to scaling Ethernet Services CCL Confidential

  29. Ethernet Demarcation • Two key functions for Ethernet demarcation • Ethernet NID (Network Interface Device) or Network Termination Equipment (NTE) • Link/Service layer Ethernet OAM – 802.3ah & 802.1ag • Ethernet Service UNI (User Network Interface) • Service layer policing and definition – MEF/ITU • Functions may be in standalone devices or integrated into first mile transport devices or CPE equipment Demarcation Point Carrier Network Customer Network 100FX, GbE or EoX 10/100BT 10/100BT Carrier Network Cust. Eqpmnt. Demarcation Device UNI & NID/NTE ADM, Modem or Media converter Customer Premise CCL Confidential

  30. User Network Interface (UNI) 10M 50M • User Network Interface (UNI) function must be at customer/carrier demarcation point • Especially if access link requires rate limiting for transport • MEF based service definition (UNI) on port or Ethernet Virtual Circuit (EVC) basis • CIR/EIR – Committed/Excess Information Rate • CBS/EBS – Committed/Excess Burst Size • Traffic classification/priority based on TOS/DSCP/802.1P/802.1Q/etc. • Low latency handling of VoIP/video services • Ethernet Virtual Circuit (EVC) or VLAN support • 802.1Q & Q-in-Q - Add, remove, swap and stacking of VLAN tags EoX 10/100BT Carrier Network Customer Equipment User Network Interface (UNI) ADM, Modem or Media converter Customer Premise CCL Confidential

  31. Link OAM Service/Connectivity OAM Network Interface Device(NID or NTE) • NID or NTE required at customer handoff for OAM • Analogous to smartjack, CSU/DSU or NTE for frame relay • Link OAM (802.3ah) is necessary but not sufficient • Performance monitoring and threshold crossing alarms • Remote failure indication - Dying gasp, link fault & critical event • Remote loopback (Port) • Services/Connectivity OAM (802.1ag, ITU, MEF, etc.) • Continuity verification • Service level loopback • AIS/RDI or fault propagation • Test head to generate test suites (RFC-2544) • Cable integrity test for customer premise Carrier visibility of customer network Carrier visibility of carrier network Carrier Network EoX 10/100BT Cust. Eqpmnt. NID/NTE Customer Premise CCL Confidential

  32. Discovery Discovery Msg (Active) • Allows provider edge switch to determine the OAM capability of the remote demarcation device • 802.3 ah OAM support is “optional” • If both ends support OAM, then the two ends exchange state and configuration • Mode - active vs passive • OAMPDU size • Identity • Loopback support Carrier Network 10/100BT EoX Cust. Eqpmnt. Demarcation Device Discovery Response (Passive) Customer Premise CCL Confidential

  33. Performance Monitoring for SLA Conformance • Collected on port and EVC (VLAN) basis • From both sides of demarcation point • RMON Etherstats aren’t enough, extensions for: • Discarded packets (out of SLA), average bit rate parameters, ingress vs. egress BW, etc. • 15 minute/24hour collection intervals with history • Threshold crossing alerts/notification • Real-time view of service performance • Reports for customer validation – monthly and web Visibility Carrier Network Customer Network Carrier Network EoX 10/100BT Cust. Eqpmnt. Demarcation Device CCL Confidential

  34. Remote Failure – Link Fault/Critical Event Demarcation Point Link Fault msg EoX Carrier Network 10/100BT Cust. Eqpmnt. Demarcation Device Customer Premise • Link Fault –e.g.Loss of signal is detected by the receiver • Sent once per second • Critical Event – Manufacturer specified failure eg hardware or software alarm • Sent immediately and continuously CCL Confidential

  35. Remote Failure - Dying Gasp Demarcation Point Dying Gasp msg Carrier Network EoX 10/100BT Cust. Eqpmnt. Demarcation Device ADM, Modem or Media converter Customer Premise • Signals carrier that an unrecoverable local fault (e.g. power failure) has occurred • Sent immediately and continuously • Critical for both AC and DC powered customer premise located equipment CCL Confidential

  36. Test Head Test Pattern Test Pattern Test Head Ethernet Port Loopback Loopback 10/100BT Customer Equipment Demarcation Device Demarcation Device Carrier Network Customer Premise Customer Premise • Port level testing is ideal for turn up and commissioning • Eliminates truck rolls • Works with central test head to perform RFC-2544 tests • Measures performance (delay, dropped packets, throughput, etc.) • Ideal for fault isolation and locating within carrier network • Can also work with integrated test head for end-to-end (service level) RFC-2544 verification • Ideal for end-to-end SLA verification CCL Confidential

  37. Selective (Non-Intrusive) Loopback Selective Loopback Customer Traffic Test Pattern Test Head 10/100BT Cust. Eqpmnt. Demarcation Device Demarcation Device Carrier Network Customer Premise Customer Premise • Selective loopback performed on VLAN or specific OAM frames (eg. opcode: ETH_LB) • Intrusively test of an individual EVC (VLAN) while remaining EVCs are in-service • Also used for continuity check and service assurance • Far-end test head executes test periodically on non-service affecting VLAN or OAM frame to verify end to end connectivity through entire network – similar to ping • Can measure delay, throughput, dropped frames of end-to-end service – follows actual data path (LSP, etc.) of customer traffic CCL Confidential

  38. Cable Integrity Testing Demarcation Point Remote Fault Carrier Network EoX 10/100BT Cust. Eqpmnt. Demarcation Device Customer Premise • Identifies opens, shorts and impedance problems with CAT-5 cable on customer premise • Measures distance to cable fault • Addresses large percent of customer induced issues CCL Confidential

  39. Ethernet AIS/RDI • Used to suppress downstream alarms and eliminate alarm storms from a single failure • Commonly used in legacy services like SONET, TDM, frame relay, etc. Alarms Suppressed Report Alarm Insert AIS CCL Confidential

  40. Fault Propagation Demarcation Point Propagation Carrier Network EoX 10/100BT Cust. Eqpmnt. Demarcation Device Link down AIS RX JABBER RFI DUP UNKNOWN Customer Premise Link down AIS Do nothing • Fault Propagation allows upstream link issues to propagate downstream • Critical for end user applications that need visibility of network issues • Eg Redundant routing protocols (HSRP) CCL Confidential

  41. Demarcation For SLA Consistency Sophisticated QoS VLAN based services Monitoring on port & VLAN Detailed statistics Customer Location 1 Customer Location 2 GbE 100FX Carrier IP Network Limited QoS Simple port level services Monitoring on port only Limited statistics ADM Customer Location 3 EoSONET ADM 100BT • Ethernet demarcation device provides SLA consistency regardless of transport technology • e.g. ADM made to look like optical Ethernet ADM 100BT 100BT Demarcation Device Ethernet Demarcation Device Sophisticated QoS VLAN based services Monitoring on port & VLAN Detailed statistics CCL Confidential

  42. Test Head Test Pattern Demarcation For OAM Capabilities Customer Location 1 Customer Location 2 GbE 1000BT 1000BT Media Converter 100FX Demarcation Device 100BT 100BT Demarcation Device Media Converter Carrier IP Network ADM Customer Location 3 EoSONET ADM • Ethernet demarcation device provides OAM capability for remote management • Performance monitoring • Remote failure indication • Remote loopback • Continuity testing • Remote test head • Cable integrity testing, etc. 100BT 100BT Demarcation Device CCL Confidential

  43. Summary • Metro Ethernet Forum web site: • http://www.metroethernetforum.org • Carrier Class Ethernet • Protection • Hard Qos • TDM support • Scalability • Service management • Ethernet Demarcation • Performance monitoring • Loop back test • Failure alarm CCL Confidential

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