Optical Network Interoperability

Vishnu Shukla Member of OIF Board of Directors Principal Member of Technical Staff Verizon [email protected]

Thomas Afferton Member of OIF Board of Directors Senior Systems Engineer Northrop Grumman TASC [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)

 

Architecture Issues with current OTN Emerging optical network technologies

 

Next-Generation Optical Transport Network (NG-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 Network Type NEs Type Interconnecting NEs Collector Ring SONET add/drop mux (ADM) Broadband digital cross connect (B-DCS) Metro Network IOF Ring ADM B-DCS Collector Ring Interoffice Ring Interoffice Ring Regional Core Long Haul Ring ADM B-DCS Access Ring Collector Ring 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 octet synchronous 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

End User Use Cases

OTN Interoperability NG-OTN Interoperability model

EMS/NM S NMS EMS TMF 814 NNI

Control Layer

SCN Domain A UNI SCN Domain B UNI TMF 814 NMS EMS

Adaptation & Transport Layer

MSPP / NGADM IP Legacy ADM CP Proxy Domain A Interface Domain B Router EMS/NM S MSPP / NGADM IP End User Use Cases

11

OTN Interoperability Management, Control, and Transport Hierarchy

Management Plane Control Plane (Embedded Controller) Transport Plane OTN

 CP is positioned between transport and management planes.

 NEs are controlled either by CP or by both management plane and CP.

 Management plane, including the OSS, configures and supervises the CP.

 Management 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 SONET, wavelength, . . .

interfaces, including Control and Signaling: Interfaces to signaling and control of routes in the network support 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 adaptation.

mapping will be required to facilitate interoperability between end nodes that perform service 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 Metro Network Mesh or Ring-DWDM MSPP or NG-ADM NEs Type Interconnecting NEs OXC WXC or (R)OADM WXC Regional Core Mesh WXC None 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

STP

SS7 Msg SCP PBX

Architecture

• Connection-oriented transport • Separated control and transport planes

Signalling

• Dedicated signalling network – SS7 network • SS7 signalling protocols (DS0 Circuit Switch) Co Switch DS0 over TDM

Routing

• Distributed & Static

Client Interface

Co Switch • UNI Overlay – Q.931, D Channel signalling, or POTS signalling PBX Voice Traffic Path Signalling Path 17

OTN Interoperability

OTN Control Plane – Now & Emerging

SCN

B-SCP

SCN SW/Router

B-SCP Signaling Messages IP Router

MSPP1 OXC1

• •

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

WXC1 WXC2 OXC2 OTN Clients MSPP2

Broadband Data Path • •

Routing

Distributed & Dynamic OTN control plane routing – GMPLS/OSPF TE •

Client Interface

OIF UNI Signalling Path 18

OTN Interoperability

ASTN/ASON Architecture Framework

Domain 1

I-NNI

Domain 1 Domain 2

I-NNI

Domain 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 (EMS NMS 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



OTN Control Plane (E-NNI, I-NNI)



OTN Mgmt Plane (EMS/NMS SPC support, TMF814) Site 1

Path 1-2

Site 2

SONET Path 2-3 SONET A Path 1-3 SONET

Z Site 3

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

Path 1-2 UNI UNI

Site 1

GbE Path 1-3 GbE GbE Path 2-3

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 low cost 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

(Packet & Cell Protocols)

SPI Framer SFI SER DES E/O Tx VSR

29

  

7 participating carrier labs around the world:

 China, Germany, Italy, Japan and USA

15 participating vendors June 22-24, 2004 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

KDDI NEC 1 Sycamore NEC NEC 2

OIF World Demo – Global Topology

Verizon Fujitsu2 Ciena OLEx Cisco X Lucent Avici2x Fujitsu1x Lucent Sycamore Sycamore Cisco 1 Cisco2 Mahi Fujitsu Tellabs Deutsche Telcom Marconi NEC Ciena Avici1 B B A Tellab s A Ciena Fujitsu2 x Cisco2 Avici2 Fujitsu1 Cisco1 Cisco2 Ciena NTT NTT-4 NTT-1 Ciena NTT-3 Avici AT&T Avici1 Nortel Sycamore Cisco1 Telecom Italia Avici2 Ciena NTT-2 Ciena emulator NEC China Telecom UNI-C1 Ciena UNI-C2 Sycamore NEC Avici2 S T M - 1 6 S T M - 1 Marconi Avici1 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 multi vendor 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: Coarse/Dense Wavelength Division Multiplexing

CP: Control Plane SCN: E-NNI: Signaling Communications Network External Network-to-Network Interface GFP: LCAS: MSPP: Generic Framing Procedure Link Capacity Adjustment Scheme Multi-Service Provisioning Platform NGOTN: OSS: OTN: OXC: ROADM: SC: Next Generation Optical Transport Networks Operations Support System Optical Transport Networks Optical Cross- Connect Re-configurable Optical Add & Drop Multiplexer Switched Connection SPC: STS: UNI: VC: VCAT: WXC: 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 McDonough, Cisco

VicePresident 

Tom Afferton, Northrop Grumman

Treasurer/ Secretary 

Marco Carugi, Nortel

Board Member 

Tom Palkert, Xilinx

Board Member 

Vishnu Shukla, Verizon

Board Member 

Doug Zuckerman, Telcordia

Board Member

Technical Committee



Steve Joiner, Bookham Technologies Chair MA&E Committee



John D’Ambrosia, Tyco

Chair 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