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Dynamic Lightpaths in R&E Networks July 17, 2007 Jeff Verrant Agenda What is a Dynamic Light Path? And Why? Technology Requirements 2 3 4 5 6 7 8 9 10 A New Networking Model 11 A New Networking Model 12 A New Networking Model 13 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 14 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 15 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 16 Research Networks The Need for Flexible Lightpaths Connectivity Requirements Guaranteed Deterministic Bandwidth (10s Mbps – 10Gbps+) Mulitple Communities of Interest 200Mb ScheduledDemand Bandwidth; Hours, Days, Weeks 500Mb 10Gb 10Mb SDH / IP/ Ethernet 1Gb (FC) Low Latency Data Replication Scarce Resources Multi-site correlation High Availability Data Collection Data Crunching Data Storage 17 Globalisation is a Reality Global, Multi-Domain Connectivity Service definition across Protocol boundaries Service Creation across domains 200Mb 10Gb SDH Data Collection Network Element Interworking functions 10Mb MPLS Data Crunching SONET Data Storage 18 Internet2 Dynamic Circuit Services (DCS) I2 HOPI: Force10 E600 10 Gigabit Ethernet 10 Gigabit Ethernet 1 Gigabit Ethernet I2 DCS: Ciena CoreDirector 10 Gigabit Ethernet OC192 SONET/SDH 1 Gigabit Ethernet or SONET/SDH 19 Integration : Core Director Domain into the End-to-End Signaling VLSR uni-subnet signaling flow data flow CoreDirector LSR upstream LSR downstream CoreDirector Ciena Region CD_a subnet signaling flow CD_z 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. 20 Graphical User Interface Monitoring and Control Ciena Core Director “NodeManager” Timeslot Map Network Utilization Monitor 21 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 1 Overhead for OA&M 7 8 14 15 16 17 1 2 FAS OTU 3 ODU 4 O P U Traffic Payload Client Payload 3824 3825 4080 FEC Forward Error Correction 22 FAS: Frame Alignment Signal OTU: Optical Transport Unit ODU: Optical Data Unit OPU: Optical Payload Unit Evolution of the Client-Server Network IP TDM Voice IP SONET/SDH is Managed Transport “Server” layer for existing service “clients” Alien Wavelengths IP IP Ethernet ESCON TDM PL FC ATM SONET /SDH IP builds over WDM Ethernet … so does Ethernet … and ESCON, FC, l services OTN WDM augments SONET/SDH capacity WDM WDM OTNisprovides now an unmanaged the necessary network Managed “Server” Transparent to many transport “Clients” Service for (which all Transport now includes Clients SONET/SDH) Animated Slide 23 Emergence of Connection Oriented Ethernet IP IP TDM Voice IP Driven by Demand for packet focused replacement of SDH Alien Wavelengths IP Ethernet ESCON TDM PL Robust as SDH FC Less Complex than MPLS ATM Less Costly than either SONET /SDH Connection oriented for deterministic B/W COE* Disable MAC learning, Broadcast Unknown, STP OTN Explicit Paths and CAC for guaranteed QoS and Restoration WDM High Availability Transparent L2 Aggregation Mux Efficiency *COE: Connection-oriented Ethernet 24 Thank You!