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Transcript
Optical Network Interoperability Vishnu Shukla Thomas Afferton Member of OIF Board of Directors Principal Member of Technical Staff Member of OIF Board of Directors Senior Systems Engineer Verizon Northrop Grumman TASC [email protected] [email protected] FCC, Washington, D.C. September 24, 2004 1 Optical Network Interoperability Outline Part I Need for optical network interoperability Current Optical Transport Network (OTN) Emerging optical network technologies Next-Generation Optical Transport Network (NG-OTN) Architecture Issues with current OTN Architecture model & interfaces Transport Adaptation Signaling & Control Management Examples of new services 2 Optical Network Interoperability Outline (cont.) Part II OIF Overview Organization Contribution to OTN interoperability Network layer Physical layer Interoperability Demonstration at Supercomm 2004 Summary Glossary 3 OTN Interoperability The Need Emerging applications require high bandwidth and dynamic interconnection with multiple applications on the network Intelligent optical network is critical to dynamic bandwidth services Standardized interworking between various network interfaces and interoperability among vendors are crucial to provision end-to-end services and establish cost effective OTN evolution path ILEC, IXC boundaries disappearing Current network is based on multiple technologies and protocols, standard and propriety, making multi-vendor and inter-carrier interworking difficult 4 OTN Interoperability Expected benefits Carriers can provision end-to-end dynamic bandwidth services Innovative emerging network technologies can be deployed at faster pace than with a single vendor solutions Cost effective selection of network elements, platforms and multi-vendor solutions Reduced operations overheads-simplified provisioning of new services Larger base of viable platform suppliers Capital cost control through competitive procurement Greater depth of technologies and platforms available Lower operations cost through simplification of network management 5 OTN Interoperability Expected benefits More affordable services for our customers Earlier introduction of next-generation networks, technologies and services Optical access and core networks FTTH, MSPP, ROADM, WXC, DWDM, etc. Dynamic end-to-end bandwidth provisioning, managed bandwidth services, . . . 6 OTN Interoperability Current optical transport OTN Transport Plane NEs\ Networks OTN Access Network Collector Ring Metro Network IOF Ring Network Type Regional Core Long Haul Ring NEs Type SONET add/drop mux (ADM) ADM ADM Interconnecting NEs Broadband digital crossconnect (B-DCS) B-DCS B-DCS Router Collector Ring B-DCS B-DCS ADM Interoffice Ring ADM Interoffice Ring ADM Access Ring Collector Ring ADM Router W-DCS 7 OTN Interoperability Issues with current optical transport Designed for voice traffic, needs to evolve to efficiently support data services Relatively static structure that does not easily address dynamic services or leverage new technologies Slow for provisioning of switched connection Connections setup via a network management system 8 OTN Interoperability Emerging optical technologies: NG-SONET NG-ADM or Multi-services Provisioning Platform (MSPP) • Integrated grooming and multiplexing functionality for different services (e.g., SONET/TDM, Ethernet, Storage Area Network protocols, IP). • GFP (Generic Framing Procedure) • Updates SONET protocol to provide mapping for virtually any kind of service into SONET. Only required at service ingress and egress points. • VCAT (Virtual Concatenation) • Provides efficient matching of SONET payload bandwidth to service requirements. Only required at service ingress and egress points. • LCAS (Link Capacity Adjustment Scheme) • Technique to dynamically adjust bandwidth provided for the service. Ethernet IP/PPP Fiber Channel Other Client Signals GFP – Client Specific Aspects (Payload Dependent) VCAT SONET/SDH Path GFP – Common Aspects (Payload Independent) Other octetsynchronous paths OTN OCh Path 9 OTN Interoperability Emerging optical technologies: Other Platforms • ROADM (Re-configurable Optical ADM) • Automates wavelength provisioning under software control. • Automates optical power level engineering. • Optical Cross Connects (OXC) • Not really optical -- Optical interfaces on electronic-based cross-connect. • Integrate 3/3 and 3/1 DCS function with OC-n switching. • Among the first elements deployed with control plane capabilities • Wavelength Cross Connects (WXC) or Photonic Switches • All Optical-based cross-connect that provides wavelength switching. Protocol and bit rate independent. 10 OTN Interoperability NG-OTN Interoperability model End User Use Cases End User Use Cases Router NMS Management Layer EMS/NM S NMS TMF 814 TMF 814 EMS Router EMS/NM S EMS NNI Control Layer SCN SCN Domain A Domain B UNI UNI Adaptation & Transport Layer MSPP / NGADM MSPP / NGADM CP Proxy Interface IP IP Legacy ADM Domain A Domain B 11 OTN Interoperability Management, Control, and Transport Hierarchy Management Plane CP is positioned between transport and management planes. Control Plane NEs are controlled either by CP or by both management plane and CP. (Embedded Controller) Management plane, including the OSS, configures and supervises the CP. Management Transport Plane OTN plane has ultimate control over all transport plane and control plane entities. 12 OTN Interoperability Specific Interfaces Client: Interfaces from the OTN control plane to the external entities that may connect to the OTN control plane Transport Plane: Physical interfaces, including SONET, wavelength, . . . Control and Signaling: Interfaces to support signaling and control of routes in the network Management and OSS: Interfaces from the control plane to the management plane. 13 OTN Interoperability Interfaces-Client Efficient and standards-based service adaptation of various client signals into SONET is a critical capability required to make the OTN service-agnostic and to provide interworking between various vendors equipment. A number of standards that include the Generic Framing Procedure (GFP), Virtual Concatenation (VCAT), and the Link Capacity Adjustment Scheme (LCAS) have been developed to facilitate the mapping of client signals into SONET. Standardized mapping will be required to facilitate interoperability between end nodes that perform service adaptation. In addition, clients must have the ability to request bandwidth and connectivity across the OTN through control plane interfaces 14 OTN Interoperability Transport Plane NG-OTN Transport Plane NEs\ Networks NG-OTN Access Network Network Type Collector Ring NEs Type MSPP or NG-ADM Interconnecting NEs OXC Metro Network Mesh or Ring-DWDM Regional Core WXC or (R)OADM WXC WXC Mesh None MSPP Router DWDM transport with integrated wavelength switching 1 GbE 10 GbE Collector Ring Wavelength Switches DWDM DWDM OXC Collector Ring ADM Ring DWDM DS3 OC-3 DS3 OC-3 OC-48 OC-192 MSPPs Collector Ring DS3 OC-3 OC-12 OC-48 1GE Lambda Service 15 OTN Interoperability OTN control plane Definition: A set of architectures and protocols that evolve the static SONET/SDH and DWDM layers of today to a dynamic, self-running optical transport network in the future. Self-configuration Auto-discovery/inventory Dynamic provisioning and service activation Traffic engineering QoS support Self-healing Auto protection and restoration Examples of Control Plane PSTN -- SS7 IP -- Datagram (TCP/IP), MPLS ATM -- UNI, B-ICI, PNNI 16 OTN Interoperability OTN control plane Background: PSTN Control Plane Services: • DS0-on-Demand • AIN services SCP SCP SS7 Msg STP DS0 over TDM PBX Architecture • Connection-oriented transport • Separated control and transport planes Signalling • Dedicated signalling network – SS7 network • SS7 signalling protocols (DS0 Circuit Switch) Co Switch Co Switch PBX Voice Traffic Path Routing • Distributed & Static Signalling Path Client Interface • UNI Overlay – Q.931, DChannel signalling, or POTS signalling 17 OTN Interoperability OTN Control Plane – Now & Emerging SCN B-SCP SCN SW/Router Signaling Messages B-SCP OTN Clients MSPP1 IP Router MSPP2 OXC1 WXC1 WXC2 OXC2 Broadband Data Path Signalling Path Architecture • Connection-oriented broadband transport • Separated control and transport planes Signalling • Dedicated and/or in-fiber signalling communication networks (SCN) • OTN control plane signalling protocol – GMPLS/RSVP-TE Routing • Distributed & Dynamic • OTN control plane routing – GMPLS/OSPFTE Client Interface • OIF UNI 18 OTN Interoperability ASTN/ASON Architecture Framework Domain 2 Domain 1 UNI User User 11 I-NNI Domain 1 E-NNI E-NNI I-NNI Domain 2 UNI UNI User 2 UNI – A demarcation point between users and service provider networks Un-trusted interface Signaling only E-NNI – A demarcation point supporting cross-domain connection provisioning Intra-carrier/Inter-domain (Trusted) or Inter-carrier (Un-trusted) Signaling with limited routing info exchanges I-NNI – Intra-domain node-to-node interface to support control plane functions Fully trusted Signaling Routing 19 OTN Interoperability OTN Control Plane Components A Signaling Communication Network (I-NNI, E-NNI, UNI) Separate (Physically or Logically) from transport network A Layer 3 IP network Signaling Protocols (I-NNI, E-NNI, UNI) RSVP-TE, CR-LDP-TE, PNNI (ITU) Routing Protocols (I-NNI, E-NNI) OSPF-TE, ISIS-TE Link Management Protocol (I-NNI, E-NNI, UNI) LMP, LMP-WDM 20 OTN Interoperability Interfaces-Management Plane Management layer interworking will be needed in an NG-OTN multi-vendor network environment enabled with control plane capabilities. Open standards-based interfaces are a critical factor for enabling management layer interworking. This will also become important when service adaptation techniques over SONET (e.g., GFP, VCAT, LCAS) are deployed in conjunction with control plane capabilities. There are several points of management plane interworking to consider: Management plane interworking between the network element and the EMS (NE-EMS interface) Management plane interworking between the EMS and its northbound NMS/OSS (EMSNMS interface) Management plane interworking between multiple OSSs (OSS-OSS) 21 OTN Interoperability-New services A-Z Provisioning via EMS/NMS and Control Plane Scenario Carrier NMS/EMS receives a service order for SONET STS-x from an enterprise customer that has three sites in the region. The order specifies points A & Z (e.g., from Site 1 to Site 2), payload rate, transparency, protection class, and other constraints. The NMS/EMS issues a command to the source node (attached to Site 1), which then triggers the control plane to setup the SONET path to Site 3 according to the requirements specified in the order. Similarly, when the customer terminates the service, NMS/EMS will invoke the control plane to tear down the path. NG-OTN Technologies Site 2 OTN Control Plane (E-NNI, I-NNI) SONET Path 1-2 OTN Mgmt Plane (EMS/NMS SPC support, TMF814) Site 1 Path 2-3 SONET A - Path 1-3 Site 3 SONET Z 22 OTN Interoperability-New services Dial-Up SONET Scenario An enterprise customer with three sites subscribes to a dial-up SONET service with a range of SONET payload rates. The service plan applies to all SONET connections between the sites. Based on business needs, the customer uses UNI signaling to dial-up the service between any two sites, sends information over the SONET path for a unspecified period of time, then hangs up. NG-SONET – GFP/VC OTN Control Plane (O-UNI, E-NNI, and I-NNI) OTN Mgmt Plane (EMS/NMS SC support, TMF814) Site 2 Path 1-2 Site 1 UNI SONET Path 2-3 SONET - Path 1-3 SONET Site 3 23 OTN Interoperability-New services Dial-Up GbE Service Scenario An enterprise customer with three sites subscribes to dial-up GbE service with a specified peak rate (P). The service plan applies to all GbE connections between the sites. Based on business needs, the customer uses UNI signaling to dial-up the service between any two sites, sends information at rates <= P for a certain period of time, then hangs up. NG-OTN Technologies OTN Control Plane (O-UNI, E-NNI, and I-NNI) OTN Mgmt Plane (EMS/NMS SC support, TMF814) Site 2 UNI GbE Path 1-2 UNI Site 1 Path 2-3 - GbE Path 1-3 GbE Site 3 24 Part 2 – Optical Internetworking Forum and World Interoperability Event Overview 25 OTN Interoperability- OIF Contributions OIF Overview Launched in April of 1998 with an objective to foster development of lowcost and scaleable internet using optical technologies The only industry group bringing together professionals from the data and optical worlds Open forum: 120+ member companies International Carriers Component and systems vendors Testing and software companies OIF Mission To foster the development and deployment of interoperable products and services for data switching and routing using optical networking technologies 26 OTN Interoperability- OIF Contributions OIF Focus Scaleable Interoperable Optical Internetworking IP-Over-Switched Optical Network Architecture Physical layer Low-cost optical interfaces between networking elements Standard device level electrical interfaces for low-cost systems Control layer interoperability between data and optical layers Dynamic configuration using IP signaling and control mechanisms Accommodate legacy network under the new physical and control layer mechanisms 27 OTN Interoperability- OIF Contributions Output from OIF Implementation agreements using Carrier & user group’s requirements as input Existing standards and specifications when available Newly developed solutions when necessary Interoperability Demonstrations to validate industry acceptance and maturity of implementation agreements Testing methods to evaluate interoperability that will help in the accelerated development of interoperable products and networks Input into other standards bodies and other fora 28 OTN Interoperability- OIF Contributions Output from OIF – Implementation Agreements 24 agreements published to date Applications include: Control plane interfaces User-to-Network (UNI), Network-to-Network (NNI), Security & Billing UNI UNI NNI Optical Network A Optical Network B Client Client Intra-office Optical interfaces Very Short Reach (VSR) 10Gb/s & 40 Gbps Tunable Lasers Assembly and Control Intra-system Electrical interfaces Serializer/Deserializer-Framer interface (SFI), Physical-Link Layer device interfaces(SPI), Fabric-to-Framer interface Link Layer SER DES Framer (Packet & Cell Protocols) SPI SFI E/O Tx VSR 29 7 participating carrier labs around the world: China, Germany, Italy, Japan and USA June 22-24, 2004 15 participating vendors Successfully demonstrated interoperability of multi-vendor networks among carrier labs across the globe: Dynamic automatic provisioning of optical circuits Data-plane interoperability of Ethernet transport over multi networks Automatic provisioning based on OIF UNI 1.0 release 2 and ENNI Implementation Agreements, both control and data plane These implementation agreements are based on the ITU-T standards for automatically switched optical networks including: Requirements and Architecture (G.8080, G.7713, G.7715, G.7715.1) Signaling protocols (G.7713.2) Ethernet Transport based on ITU-T standards for Ethernet service adaptation, Ethernet over SONET/SDH services testing includes: Generic Framing Procedure (GFP) Virtual Concatenation (VCAT) Link Capacity Adjustment Scheme (LCAS) 30 OIF World Interoperability Demonstration Notional Topology 31 OIF World Demo – Global Topology Verizon Fujitsu2 Ciena Cisco X OLEx Lucent Avici2x Mahi Sycamore Cisco Cisco2 1 KDDI NEC 1 Sycamore A Ciena B NEC Avici1 NEC NEC 2 A Tellab B s NTT-3 NTT-4 NTT-1 Avici Lucent Sycamore Fujitsu Ciena B Avici2 Ciena emulator NEC China Telecom UNI-C1 Ciena Cisco1 Cisco2 Cisco1 Nortel Telecom Italia Sycamore Ciena Avici2 NTT-2 Marconi Ciena AT&T Avici1 Fujitsu2 x Deutsche Tellabs Telcom Cisco2 A Fujitsu1 NTT Fujitsu1x Ciena Avici2 NEC STM-16 Avici1 STM-1 UNI-C2 Sycamore Marconi 32 Example #1 of the Connections 33 Example #2 of the Connections 34 Significance of This Achievement First time ever in the industry to conduct a world wide multi-carrier interoperability testing Extensive carrier involvement is a key milestone towards industry adoption Lays groundwork for future inter-carrier interface development Successful dynamic control plane and data plane integration validates OIF’s Implementation Agreements and ITUs Standards Demonstrates standardization clearly facilitates multivendor interoperability and wide-scale deployment 35 OTN Interoperability Summary Carriers are driving the requirements of the next generation IP optical networks under an unified control plane Evolutional approach towards the integrated network architecture of an unified control plane has gained wide supports in the service provider and vendor community in the industry OIF plays an important role in the continued service provider trial and public interoperability events, which are the key steps to ensure successful and deployable next generation network architecture Large scale, world wide interoperability testing validates the technology maturity Validated interoperability among industry leading vendors Allowed service provider to examine performance and network behavior of the next generation network Demonstrated new network service models and applications 36 Thank You 37 OTN Interoperability Glossary C/DWDM: CP: SCN: E-NNI: GFP: LCAS: MSPP: NGOTN: OSS: OTN: OXC: ROADM: SC: SPC: STS: UNI: VC: VCAT: WXC: Coarse/Dense Wavelength Division Multiplexing Control Plane Signaling Communications Network External Network-to-Network Interface Generic Framing Procedure Link Capacity Adjustment Scheme Multi-Service Provisioning Platform Next Generation Optical Transport Networks Operations Support System Optical Transport Networks Optical Cross- Connect Re-configurable Optical Add & Drop Multiplexer Switched Connection Soft Permanent Connection Synchronous Transport Signal User-to-Network Interface Virtual Container Virtual Concatenation Wavelength Cross-Connect 38 Back-up Slides OIF reference material 39 OTN Interoperability- OIF Contributions OIF Directors & Officers Directors Joe Berthold, Ciena President John Technical Committee Steve Joiner, Bookham Technologies Chair McDonough, Cisco VicePresident Tom Afferton, Northrop Grumman Treasurer/ Secretary Marco MA&E Committee John D’Ambrosia, Tyco Chair Carugi, Nortel Board Member Tom Palkert, Xilinx Board Member Vishnu Shukla, Verizon Board Member Doug Zuckerman, Telcordia Board Member 40 OTN Interoperability- OIF Contributions OIF and Standards Bodies Established Liaisons With: American National Standards Institute - ANSI T1 International Telecommunications Union - ITU-T – OIF is A5 qualified Internet Engineering Task Force - IETF ATM Forum IEEE 802.3ae 10 Gb Ethernet Network Processing Forum - NPF Metro Ethernet Forum – MEF Rapid I/O Tele Management Forum – TMF XFP MSA Group 41 OTN Interoperability- OIF Contributions Technical Committee - Working Groups Architecture & Signaling Services, network requirements and architectures Protocols for automatic setup of lightpaths Carrier Requirements and applications OAM&P (Operations, Administration, Maintenance and Provisioning) Network management Interoperability Interoperability testing Physical and Link Layer Equipment and subsystem module interfaces PLUG (Physical Layer User Group ) Guidelines for components, modules, subsystems and communication links 42 OTN Interoperability- OIF Contributions Implementation Agreements Electrical Interfaces OIF-SPI3-01.0 - SPI-3 Packet Interface for Physical and Link Layers for OC-48. OIF-SFI4-01.0 - Proposal for a common electrical interface between SONET framer and serializer/deserializer parts for OC-192 interfaces. OIF-SFI4-02.0 - SERDES Framer Interface Level 4 (SFI-4) Phase 2: Implementation Agreement for 10Gb/s Interface for Physical Layer Devices. OIF-SPI4-01.0 - System Physical Interface Level 4 (SPI-4) Phase 1: A System Interface for Interconnection Between Physical and Link Layer, or Peer-to-Peer Entities Operating at an OC-192 Rate (10 Gb/s). OIF-SPI4-02.01 - System Packet Interface Level 4 (SPI-4) Phase 2: OC-192 System Interface for Physical and Link Layer Devices. OIF-SPI5-01.1 - System Packet Interface Level 5 (SPI-5) : OC-768 System Interface for Physical and Link Layer Devices. OIF-SFI5-01.0 - Serdes Framer Interface Level 5 (SFI-5): 40Gb/s Interface for Physical Layer Devices. OIF-SxI5-01.0 - System Interface Level 5 (SxI-5): Common Electrical Characteristics for 2.488 - 3.125Gbps Parallel Interfaces. OIF-TFI5-01.0 - TDM Fabric to Framer Interface (TFI5) 43 OTN Interoperability- OIF Contributions Implementation Agreements Tunable Lasers OIF-TL-01.1 - Implementation Agreement for Common Software Protocol, Control Syntax, and Physical (Electrical and Mechanical) Interfaces for Tunable Laser Modules. OIF-TLMSA-01.0 - Multi-Source Agreement for CW Tunable Lasers. OIF-ITLA-MSA-01.0 - Integratable Tunable Laser Assembly Multi-Source Agreement Very Short Reach Interface OIF-VSR4-01.0 - Very Short Reach (VSR) OC-192 Interface for Parallel Optics. VSR4-02 (OC-192 Very Short Reach Interface, 1 fiber 1310nm) Note: VSR4-02 has been included as the 4dB link option in VSR4-05 below OIF-VSR4-03.0 - Very Short Reach (VSR) OC-192 Four Fiber Interface Based on Parallel Optics. OIF-VSR4-04.0 - Serial Shortwave Very Short Reach (VSR) OC-192 Interface for Multimode Fiber. OIF-VSR4-05.0 - Very Short Reach (VSR) OC-192 Interface Using 1310 Wavelength and 4 and 11 dB Link Budgets. OIF-VSR5-01.0 - Very Short Reach Interface Level 5 (VSR-5): SONET/SDH OC-768 Interface for Very Short Reach (VSR) Applications. 44 OTN Interoperability- OIF Contributions Implementation Agreements UNI – NNI OIF-UNI-01.0 - User Network Interface (UNI) 1.0 Signaling Specification. OIF-UNI-01.0-R2 - User Network Interface (UNI) 1.0 Signaling Specification, Release 2: Common Part OIF-CDR-01.0 - Call Detail Records for OIF UNI 1.0 Billing. OIF-SEP-01.1 - Security Extension for UNI and NNI OIF-SMI-01.0 - Security Management Interfaces to Network Elements OIF-E-NNI-Sig-01.0 - Intra-Carrier E-NNI Signaling Specification 45