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Multi-Protocol Label Switching Technology for Next Generation Internet

Multi-Protocol Label Switching Technology for Next Generation Internet. 1999. 9. 2. ETRI Switching & Transmission Technology Research Laboratory Chu-Hwan Yim. Topics. Internet - Current Status Current Internet - What is the Problem? MPLS( Multi-Protocol Label Switching) Technology.

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Multi-Protocol Label Switching Technology for Next Generation Internet

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  1. Multi-Protocol Label Switching Technology for Next Generation Internet 1999. 9. 2. ETRI Switching & Transmission Technology Research Laboratory Chu-Hwan Yim

  2. Topics • Internet - Current Status • Current Internet - What is the Problem? • MPLS(Multi-Protocol Label Switching) Technology

  3. Internet Topology - USA A Picture designating the real connection state of USA’s internet. http://www.caida.org/Presentations/IEPG.9808/outline-1.html

  4. Internet Connection in Korea

  5. Telecom Service Forecasting in Korea Subscribers (Unit: 10,000) Telephony Internet CATV PC Comm. ISDN Source: ETRI TM - KII Strategy

  6. Internet Traffic (USA) Terabyte/day • Rapid Growth of Internet Traffic • New Internet Services • IP Voice, Fax • IP-VPN • New Technology • DWDM, ADSL • Terabit Router Source: ATM Year’98 AT&T

  7. Average Duration of Internet Calls Voice Call Source: ISS’97

  8. Internet Hop Distance - Average 15 Hops - the main cause of Internet Delay http://www.caida.org/Presentations/IEPG.9808/outline-1.html

  9. Internet Loss & Response Time(North America) Packet Loss Average 6% Response Time Average 280 ms

  10. Internet Loss & Response Time(Europe) Packet Loss Average 8% Response Time Average 400 ms

  11. Internet Loss & Response Time(Asia) Packet Loss Average 18% Response Time Average 590 ms

  12. VoIP(Voice over IP) Delay PSTN PSTN Internet GW GW PC-to-PC Architecture Gateway Architecture PSTN (Modem) PSTN (Modem) Internet 30~100* msec 30~100* msec 70~110 msec 140~460 msec 170~500 msec 100~210 msec Total delay is dominated by sound card and modem delay(100~430msec). Hard to reduce below 100msec of End-to-End delay. *Case of measured link delay at Chicago-California(2000 miles).

  13. VoIP Quality Characteristic 20% A Potentially useful 10% Good B C 5% N D Toll Quality Delay 100ms 150ms 400ms N: The present quality limitation of VoIP A: Case of insufficient buffer on the path (high loss, low delay) B,C: Case of suitable buffer on the path D: Case of sufficient buffer on the path (low loss, high delay) Loss Required below 7% of loss and below 120msec of delay for reasonable voice quality. IEEE Network Jan/Feb 1998

  14. Internet Networking Issues QoS VPN High-Speed Low Cost - Admission control - Traffic shaping - Scheduling - CUG - Reliability - Network management - Billing - Performance - Scalability - Low Cost . Equipment . Operation IP over ATM IP over SDH/WDM IP over ? (MPLS ?)

  15. Requirements of Internet • VPN(Virtual Private Network) • Reduction of Teleco cost (Leased Line, Remote Access) • Reduction of INTRANET construction cost(RAS, PABX) • CoS(Class of Service) • To meet the users’ requirements in delay and loss • To support various types of traffic in the same network • Flows • Traffic engineering

  16. MPLS and INTERNET • Appropriate for Internet Backbone • Easy to implement VPN • less processing overhead than router-based VPN • Support of CoS • strict QoS support • easy to support ‘Differentiated Service’ • Traffic Engineering Aspects • Path-level traffic control • Dynamic Bandwidth allocation

  17. MPLS Motivations • Simplify integration of ATM and IP • Offer both ATM and native IP services in a single network • Offer benefits of traditionally found only in Level 2 networks directly to IP - Traffic Engineering, VPNs • Address major network scalability challenges • Permit graceful evolution of routing and services

  18. MPLS extends traditional IP in the following areas: • Simplified Forwarding • Based on labels instead of longest prefix-match • Efficient Explicit Routing • Route is specified once by source at path setup time • Traffic Engineering • Split traffic load over multiple parallel or alternate routes • QoS Routing • Select routes based upon QoS requirements

  19. MPLS Network Architecture Label Switch Router (LSR) • Switching on Label • Label swapping MPLS Domain LER Label Edge Router (LER) MPLS Control Component LER • Full-function Layer 3 routers • Label Binding based on FIB ATM Switch Fabric

  20. MPLS Network • Routing at Layer 3, Forwardingat Layer 2 End System End System LER LSR LSR LER IP routing IP routing IP routing IP routing IP routing IP routing ATM/FR/ Ethernet (Switch or Router) ATM/FR/ Ethernet (Switch or Router) ATM/FR/ Ethernet (Switch or Router) ATM/FR/ Ethernet (Switch or Router) ATM/FR/ Ethernet ATM/FR/ Ethernet MPLS Domain

  21. MPLS Components and Protocols • Separation allows flexibility • Simple label-swapping paradigm • Multiple Control Planes can manipulate labels • Various applications can directly manipulate label binding LDP CR-LDP Unicast Routing Multicast Routing (PIM) Traffic Engineering Differental Services QoS (RSVP) Virtual Private Networks TCP/IP Label Information Base (LIB) Per-label Forwarding, Queuing, Multicasting ATM, FR, Ethernet, SONET

  22. MPLS Benefits • Integration of IP and ATM • New services and capabilities for IP • VPNs • Traffic Engineering • Flexibility in the delivery of new routing services • Scalability

  23. MPLS Internet Premium Service : Super - ISP Service • Premium Internet Access Service • 1.5~155Mbps, CoS Selection and QoS Guarantee Service • Service for business user, Value-added items • High-speed Internet Access (1 or 2 Hops in a network) • High-speed Net. Server Access • Portal Server, IP/CP Server, E-business, Cyber Mall • High-speed access to International Gateway Node • VPN Service • High-speed IP-TV Broadcast Service • Role of LERas PoP and GigaPoP

  24. MPLS Internet Backbone Service : Super - NSP Service • ISPBackbone Service • NSP Service for national ISPs • Backbone Access Service for regional ISPs • Common Int’l Gateway with Caching • Internet Traffic Exchange Service between ISPs • Role of Network Access Point • Peering Service • Service agreement between ISP and NSP • Bi-, Multilateral peering • Additional Routing Server Support • Policy-based routing, BB(Bandwidth Broker), RA(Routing Arbiter)

  25. New Services are Driving the Need to Scale IP Networks • Packet Forwarding • Packet Filtering • Policing • IP Flow Classification • BGP Peering • IGP Scaling • Multicast Scaling • Policy Scaling • Virtual Routing MPLS: Multiservice IP + ATM Source: NGN’98

  26. Driving Force in IP Networking Network Management Scalable Multicast Intelligent Data Network New IP Services MPLS Multiservice Network Extranets Traffic Management Intranets Traffic Engineering Security CoS, QoS and Differential Services Directory Service Carrier-Class WAN Backbone with Quality IP Source: NGN’98

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