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IST Project LION

IST Project LION. Outline. IST-project LION Layers Interworking in Optical Networks Overview – objectives Testbed Progress: 2 examples Recovery experiments on testbed Design of survivable multilayer IP over Optical Network. IST Project LION. Telecom Italia Lab - Prime Contractor.

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IST Project LION

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  1. IST Project LION

  2. Outline • IST-project LION • Layers Interworking in Optical Networks • Overview – objectives • Testbed • Progress: 2 examples • Recovery experiments on testbed • Design of survivable multilayer IP over Optical Network

  3. IST Project LION Telecom Italia Lab - Prime Contractor Nippon Telegraph and Telephone Agilent Technologies Italia National Technical University of Athens Universitat Politecnica de Catalunya Cisco Systems International Sirti The University of Mining and Metallurgy T - NOVA - Deutsche Telekom Telekomunikacja Polska Interuniversity Microelectronics Centre Siemens ICN Tellium

  4. IST Project LION • Context • Evolution of current transport networks towards next generation optical networks • Main Objective • Study, development and experimental assessment of an Automatic Switched Optical Network (ASON) • Project Data • Starting date : Jan-2000 • Duration : 36 months • Total Cost : 10,686,236 EURO • EC Contribution : 5,499,951 EURO

  5. Objectives of the Project • Definition of architecture and functional requirements for next generation optical networks (e.g. ASON and G-MPLS) • Identification of resilience strategies for multi-layer networks • Cost evalutation of IP over ASON solutions (case studies) • Definition of a network management view for ASONs • Design and implementation of two interworking Network Managers via a CORBA interface • Design and implementation of UNI and NNI • Design and implementation of Optical Control Planes • Development of a test bed IP over ASON

  6. Emerging Network Requirements • Convergence of voice-video-data applications over the same infrastructure • Reduced complexity and de-layering • Higher penetration of opt. transport services • Flexible and cost-effective end-to-end provisioning of optical connections • Optical re-routing and restoration • Support of multiple clients (metro) • Multiple levels of QoS • Optical Virtual Private Networks (OVPN)

  7. T-Nova NMS Interdomain NMS interworking via a CORBA-based interface UNI (data) UNI (data & signaling) NNI (data & signaling) ci@oNet NMS GSR4 Siemens Domain OXC2 OXC3 TILAB UNI/NNI signaling G.709 interfaces GSR5 GSR1 TILAB Domain OXC1 OADM1 Siemens OXCs with NNI signaling OADM3 OADM2 Cisco GSRs with UNI signaling GSR2 GSR3 Tellium Domain Tellium OXC OXC4 ASON Test bed

  8. Outline • IST-project LION • Layers Interworking in Optical Networks • Overview – objectives • Testbed • Progress: 2 examples • Recovery experiments on testbed • Design of survivable multilayer IP over Optical Network

  9. WDM GbE STM-1 / POS-1 STM-16 / POS-16 Eth 10/100 POTS 2R transponder LSP 2 -> 5 (working) LSP 2 -> 5 (backup) Measurements: MPLS rerouting AR2 SW4 Client LSP 5 -> 2 (working) SW2 LSP 5 -> 2 (backup) OXC1 GSR5 GSR1 ADM B GSR4 OADM1 Traffic generator OADM3 GSR2 OADM2 SW1 AR1 SW3 GSR3 ADM C ADM D Server

  10. WDM GbE STM-1 / POS-1 STM-16 / POS-16 Eth 10/100 POTS 2R transponder LSP 2 -> 5 (working) LSP 2 -> 5 (backup) OADM1 OADM3 Measurements: Optical Protection AR2 SW4 Client LSP 5 -> 2 (working) SW2 LSP 5 -> 2 (backup) OXC1 GSR5 GSR1 ADM B GSR4 Traffic generator GSR2 OADM2 SW1 AR1 SW3 GSR3 ADM C ADM D Server

  11.  25 ms  7  39 s Packet Loss Measurement Optical protection MPLS rerouting Lost Packets min ave max min ave max GSR2  GSR5 (250 Byte) 831 936 1140 375 152 711 490 1 796 002 GSR5  GSR2 (250 Byte) 0 0 0 321 236 378 746 574 654 GSR2  GSR5 (1500 Byte) 190 232 353 64 131 168 622 310 154 GSR5  GSR2 (1500 Byte) 0 0 0 45 441 73 707 122 770 GbE does not allow fast failure detection --> HELLO detection scheme (+/- 40 sec)

  12. Outline • IST-project LION • Layers Interworking in Optical Networks • Overview – objectives • Testbed • Progress: 2 examples • Recovery experiments on testbed • Design of survivable multilayer IP over Optical Network

  13. MPLS LSP(working) MPLS LSP (protected in OTN) Backup MPLS LSP Some actions at the IP-MPLS layer is needed. Multilayer survivability: bottom-up strategy IP-MPLS Optical node failure  optical recovery can only restore transit lightpaths OTN

  14. Some working and spare LSPs shown. Topology has to be biconnected to allow IP-MPLS recovery of router failures IP-MPLS OTN Capacity needed on OTN links 2 2 3 OTN Static recovery schemes • Recovery scheme at the IP-MPLS layer (MPLS rerouting, local protection,…) -> IP topology has to be biconnected • Assumption: MPLS rerouting • Recovery scheme at the OTN layer (1+1 protection, link restoration,…) • Assumption: dedicated path protection • Multilayer scheme • Options to support IP spare capacity • double protection • IP spare not protected • common pool • Assumption: bottom-up escalation strategy Static multilayer resilient scheme

  15. Failure-free scenario … IP-MPLS IP-MPLS … OTN OTN Worst case capacity and resource requirements over all scenarios Dynamic, ASON-based multilayer resilience scheme IP-MPLS OTN 1 1 2 OTN Dynamic ASON-based recovery schemes Single IP router failure scenarios • Dimensioning of multiple IP layer topologies • 1 for nominal (fault-free) scenario • 1 for each topology related with a single IP router failure • Capacity needed in OTN is calculated for each dimensioning, taking into account capacity needed to recover from OTN failures (by means of 1+1 path protection) • Resources needed in OTN to recover from all possible single IP or OTN failures are the worst case resource requirements of the OTN taken over the failure-free scenario and all IP failure scenarios

  16. Relative Optical Layer Cost (%-age of nominal case) Line Cost Node Cost Tributary Cost 160% 140% 120% 100% 80% 60% 40% 20% 0% ASON global double protection IP spare not common pool ASON local reconfiguration protected reconfiguration Multilayer resilience scheme Cost comparison • ASON local reconfiguration needs fewest capacity • ASON global reconfiguration  double protection Note: ASON reconfiguration schemes have better fault coverage

  17. For Further ContactsProject Leader of IST LIONantonio.manzalini@tilab.comPhone: +39 011 2285 817

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