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Dynamic Lightpaths in R&E Networks

Dynamic Lightpaths in R&E Networks. July 17, 2007 Jeff Verrant. Agenda. What is a Dynamic Light Path? And Why? Technology Requirements. A New Networking Model. A New Networking Model. A New Networking Model. Layers : Dynamic Connections are not just wavelengths.

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Dynamic Lightpaths in R&E Networks

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  1. Dynamic Lightpaths in R&E Networks July 17, 2007 Jeff Verrant

  2. Agenda • What is a Dynamic Light Path? And Why? • Technology Requirements

  3. A New Networking Model

  4. A New Networking Model

  5. A New Networking Model

  6. Layers : Dynamic Connections are not just wavelengths • Layer 1 : Wavelength Switching • Map an application directly onto a 10G wavelength • Dynamically provision and switch the lightpath • Layer 2 : vlan / ethernet – gfp – vcg / sonet ( OTN ) • 50M – 10G, increments of 50M • Apply push / pop vlan switching • No stranded bandwidth • Dynamic provisioning, dynamic sizing • Layer 2.5 - 3 : MPLS / ip switching

  7. Wavelength Switching • Any channel from any node, to any node • Remote provisioning of wavelength route • Simplifies maintenance activities • Improve stability, reliability and traceability by removing “fingers” from the network • Accelerates rollout velocity • Quickly re-route existing service • Simplifies network planning • No stranded wavelengths • Safegaurds upgrade capacity • Extends life of network • Limited need for accurate node-by-node capacity projections • OpEx and CapEx savings

  8. Layers : Dynamic Connections are not just wavelengths • Layer 1 : Wavelength Switching • Map an application directly onto a 10G wavelength • Dynamically provision and switch the lightpath • Layer 2 : vlan / ethernet – gfp – vcg / sonet ( OTN ) • 50M – 10G, increments of 50M • Apply push / pop vlan switching • No stranded bandwidth • Dynamic provisioning, dynamic sizing • Layer 2.5 - 3 : MPLS / ip switching

  9. 500Mb 200Mb 10Mb 1Gb (FC) Research NetworksThe Need for Flexible Lightpaths Connectivity Requirements • Guaranteed Deterministic Bandwidth (10s Mbps – 10Gbps+) • Scheduled-Demand Bandwidth; Hours, Days, Weeks • Low Latency • Data Replication • Multi-site correlation • High Availability Mulitple Communities of Interest 10Gb SDH / IP/ Ethernet Scarce Resources Data Collection Data Crunching Data Storage

  10. Globalisation is a Reality Global, Multi-Domain Connectivity Service definition across Protocol boundaries Service Creation across domains Network Element Interworking functions 200Mb 10Mb 10Gb SDH SONET MPLS Data Collection Data Crunching Data Storage

  11. Internet2 Dynamic Circuit Services (DCS) I2 HOPI: Force10 E600 I2 DCS: Ciena CoreDirector 10 Gigabit Ethernet 10 Gigabit Ethernet 10 Gigabit Ethernet OC192 SONET/SDH 1 Gigabit Ethernet 1 Gigabit Ethernet or SONET/SDH

  12. VLSR uni-subnet LSR downstream LSR upstream Integration : Core Director Domain into the End-to-End Signaling signaling flow uni, tl1 uni, tl1 data flow Ciena Region CD_a CD_z subnet signaling flow • Signaling is performed in contiguous mode. • Single RSVP signaling session (main session) for end-to-end circuit. • Subnet path is created via a separate RSVP-UNI session (subnet session), similar to using SNMP/CLI to create VLAN on an Ethernet switch. • The simplest case: one VLSR covers the whole UNI subnet. • VLSR is both the source and destination UNI clients. • This VLSR is control-plane ‘home VLSR’ for both CD_a and CD_z. • UNI client is implemented as embedded module using KOM-RSVP API.

  13. Ciena Core Director • “NodeManager” • Graphical User Interface • Monitoring and Control Timeslot Map Network Utilization Monitor

  14. Optical Transport Network (OTN) • ITU Standards G.709 “Digital Wrapper”, G.872, G.873.1 • Defines line/muxing rates, Optical Transport Unit (OTU) • ODU-1/2/3 payload in OTU-1/2/3 = 2.5/2.7Gbps, 10/10.7Gbps, 40/43.0Gbps • OTU-2 supports 10GbE LAN PHY (Extensions to include Preamble, Over-clocked for IFG) • OTN & SONET/SDH share same foundation • Similar framing with addition of OTN FEC • Powerful OA&M capabilities (GCC0 akin to DCC) • Asynchronous and Transparent • Services with different clock sources integrated side-by-side • Secure; Client OAM channels maintained Traffic Payload FAS: Frame Alignment Signal OTU: Optical Transport Unit ODU: Optical Data Unit OPU: Optical Payload Unit Overhead for OA&M Forward Error Correction

  15. IP Alien Wavelengths IP IP TDM Voice IP Ethernet ESCON TDM PL FC ATM SONET /SDH Ethernet OTN WDM WDM is now an unmanaged network “Server” to many transport “Clients” (which now includes SONET/SDH) OTN provides the necessary Managed Transparent Service for all Transport Clients Evolution of the Client-Server Network SONET/SDH is Managed Transport “Server” layer for existing service “clients” IP builds over WDM … so does Ethernet … and ESCON, FC, l services WDM augments SONET/SDH capacity Animated Slide

  16. Driven by Demand for packet focused replacement of SDH Robust as SDH Less Complex than MPLS Less Costly than either Connection oriented for deterministic B/W Disable MAC learning, Broadcast Unknown, STP Explicit Paths and CAC for guaranteed QoS and Restoration High Availability Transparent L2 Aggregation Mux Efficiency Alien Wavelengths IP TDM Voice IP ESCON IP TDM PL FC IP Ethernet ATM SONET /SDH COE* OTN WDM Emergence of Connection Oriented Ethernet *COE: Connection-oriented Ethernet

  17. Thank You!

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