Download Next-Generation Optical Transport Networks Demonstrations

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
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