Tambahan Modul_3 part 2Jastel(2)

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  • ADM: Add-drop multiplexer DACS: Digital access cross-connected systems TDM: time-division multiplexing
  • Limited Scalability: upgrading existing system requires forklift change-outs of all infrastructure components or adding dark fiber to deploy additional rings with additional equipment. Expensive: to service the network, manual reconfiguration may be required at all layers.
  • Tambahan Modul_3 part 2Jastel(2)

    1. 1. <ul><li>Metropolitan Ethernet Networks </li></ul><ul><li>Estella Kang </li></ul><ul><li>Matt Powers </li></ul>SC441 Computer Networks – Independent Study Boston University
    2. 2. <ul><li>Typically covers several hundred miles of concentrated metropolitan areas </li></ul><ul><li>Explosion of Internet traffic and IP services demand for rapid scalability and dynamic functionality </li></ul>
    3. 3. <ul><li>Service and operational cost reduced </li></ul><ul><li>Scalable – up to 100Gbps </li></ul><ul><li>Simple – fewer protocol conversion </li></ul>
    4. 4. <ul><li>Full suite of carrier-class Ethernet services </li></ul><ul><li>Ethernet switching </li></ul><ul><li>Statistical multiplexing functionality </li></ul><ul><li>Bandwidth-on-demand service </li></ul>
    5. 5. <ul><li>Service and management </li></ul><ul><li>Scalability </li></ul><ul><li>Network Reliability </li></ul><ul><li>Co-existence with existing infrastructure </li></ul><ul><li>Topological flexibility </li></ul><ul><li>Reduction in operational and network costs </li></ul>
    6. 6. <ul><li>A Metro Ethernet is a computer network based on the Ethernet standard and which covers a metropolitan area . It is commonly used as a metropolitan access network to connect subscribers and businesses to a Wide Area Network , such as the Internet . Large businesses can also use Metro Ethernet to connect branch offices to their Intranet . </li></ul><ul><li>A typical service provider Metro Ethernet network is a collection of Layer 2 or 3 switches or routers connected through optical fiber . The topology could be a ring , hub-and-spoke (star), or full or partial mesh . The network will also have a hierarchy: core, distribution and access. The core in most cases is an existing IP / MPLS backbone, but may migrate to newer forms of Ethernet Transport in the form of 10G or 100G speeds. </li></ul><ul><li>Ethernet on the MAN can be used as </li></ul><ul><ul><li>pure Ethernet, </li></ul></ul><ul><ul><li>Ethernet over SDH, </li></ul></ul><ul><ul><li>Ethernet over MPLS or </li></ul></ul><ul><ul><li>Ethernet over DWDM </li></ul></ul>SM341073 Pengenalan Teknologi dan Jasa Telekomunikasi Semester Ganjil Tahun Ajaran 2009 - 2010
    7. 7. <ul><li>The main advantages of an MPLS-based Metro Ethernet against a pure Ethernet are: </li></ul><ul><ul><li>Scalability : pure Ethernet MAN are limited to a maximum of 4,096 VLANs for the whole network, when using MPLS, Ethernet VLANs have local meaning only (like Frame Relay PVC). </li></ul></ul><ul><ul><li>Resiliency : pure Ethernet network resiliency relies on STP or RSTP (30 to 1 sec convergence) while MPLS-based MANs use MPLS-based mechanism </li></ul></ul><ul><ul><li>Multiprotocol convergence : with the maturity on pseudowires standards (ATM VLL, FR VLL, etc.) an MPLS-based Metro Ethernet can backhaul not only IP/Ethernet traffic but virtually any type of traffic coming from customer networks or other access networks (i.e. ATM aggregation for UMTS). </li></ul></ul><ul><ul><li>End to End OAM : MPLS-based MAN offers a wider set of troubleshooting </li></ul></ul><ul><li>The Metro Ethernet Forum (MEF) has defined two types of services that can be delivered through Metro Ethernet: </li></ul><ul><ul><li>E-Line also known as Virtual Leased Line and Point-to-Point . </li></ul></ul><ul><ul><li>E-LAN also known as Virtual Private LAN Services , Transparent LAN Services and MultiPoint-to-MultiPoint . </li></ul></ul>SM341073 Pengenalan Teknologi dan Jasa Telekomunikasi Semester Ganjil Tahun Ajaran 2009 - 2010
    8. 8. <ul><li>Ethernet Private Line </li></ul><ul><ul><li>Dedicated UNIs for Point-to-Point connections </li></ul></ul>MEN Ethernet UNI Ethernet UNI Ethernet UNI Point-to-Point EVCs (dedicated BW) CE Ethernet Private Line using E-Line Service type Private Line Analogy to E-Line Service Internet ISP POP Storage SP Ethernet UNI MEN OC-3 OC-3 DS1 Dedicated TDM circuits CE Internet ISP POP Storage SP DS3 CE CE CE CE
    9. 9. <ul><li>Ethernet Virtual Private Line </li></ul><ul><ul><li>Supports Service Multiplexed UNI </li></ul></ul><ul><ul><li>Point-to-Point VPN for site interconnectivity </li></ul></ul>CE CE MEN Ethernet UNI Ethernet UNI Service Multiplexed Ethernet UNI Point-to-Point EVCs CE FR CPE FR CPE MEN FR UNI FR UNI FR UNI Point-to-Point FR PVCs Ethernet Virtual Private Line using E-Line Service type Frame Relay Analogy to E-Line Service FR CPE
    10. 10. <ul><li>Metro core and metro access ring topology </li></ul><ul><li>ADM </li></ul><ul><li>DACS </li></ul><ul><li>TDM </li></ul>
    11. 11. <ul><li>Complex, multi-tiered, hierarchical network </li></ul><ul><li>Limited Scalability </li></ul><ul><li>Expensive </li></ul>
    12. 12. <ul><li>Label switching to forward data by mapping VLAN tags to label switched paths (LSPs) </li></ul><ul><li>Load sharing by switching path around bottlenecks to less congested links </li></ul><ul><li>Dedicated backup LSP and fast reroute when a connection failure occurs </li></ul>
    13. 13. <ul><li>Pada kecepatan tinggi IP terlalu komplek. </li></ul><ul><li>Pada kecepatan tinggi IP terlalu memakan resource CPU. </li></ul><ul><li>Operator perlu teknologi yang effisien. </li></ul>
    14. 14. <ul><li>Tujuan direct hanya terbatas. </li></ul><ul><ul><li>Misalnya Lampung --> Jakarta, Medan, Surabata dan Internet. </li></ul></ul><ul><ul><li>Sangat terbatas, tidak banyak tujuan kecuali Internet. </li></ul></ul><ul><li>Aplikasi pelanggan juga terbatas. </li></ul><ul><ul><li>E-mail, web, sekali-sekali video conference. </li></ul></ul><ul><ul><li>Perlu customisasi per pelanggan yang mudah. </li></ul></ul>
    15. 15. <ul><li>Label Switch – jauh lebih sederhana & effisien. </li></ul><ul><li>TCP/IP – kompleks & tidak effisien. </li></ul><ul><li>Label Switch – jauh lebih baik untuk backbone daripada IP. </li></ul>
    16. 17. <ul><li>LIB = Label Information Base </li></ul><ul><li>LSR = Label Switched Router </li></ul>
    17. 18. <ul><li>LSR, Label Switched Router – router yang mampu melakukan switching dengan label. </li></ul><ul><li>LIB, Label Information Base – kira-kira tabel routing label tempat melihat outbound Interface & label yang digunakan utk mengirim paket. </li></ul>

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