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Interoperable Intelligent Optical Networking: Key to future network services and applications
OIF Carrier Group
Interoperability: Key issue for carriers and ISPs
Carrier Participation
OIF Carrier Involvement Carrier’s integral members of OIF: OIF Carrier
Working Group• Established in 2001 with charter to develop
requirements and guidelines for services and functions to be supported by future optical networking products
• Guiding OIF work to address pressing issues within carrier networks
• Providing detailed requirements for developing specifications
Carrier participation in other working groups• Ensuring that technical solutions being
developed address network and service requirements
• Contributing to technical solutions and interoperability agreements
Intelligent Optical Network: Motivations
Distributed intelligence(control plane)
Mesh topologies
Dynamic network reconfigurability
Network is “database”
New service enabler
Scalability Reduced carrier-specific management
system development Technology reuse
Reduced inventory and dependence on forecasts
Improved customer service: reduced provisioning times
Reduced capital expenditure – mesh restoration
Reduced management system development costs
Accurate, real-time state information
Bandwidth on Demand Optical VPNs Scheduled connections
Intelligent Optical (Transport) Networks
Portland
Newark
Houston
Phoenix
Salt LakeCity
Detroit
Seattle
Raleigh
Denver
Atlanta
Minneapolis
Tampa
Orlando
Chicago
St Louis
San Diego
Intelligent Optical Network Element
Cambridge
San Francisco
KansasCity
Los Angeles
Dallas
Wash.DC
Manchester
Ft. Lauderdale
Phil
NYC
connectionprovisioned
Transport link
Austin
Control Plane Interfaces
Service Provider A Admin Domain
UNI
Inter-carrier External Network Network Interface(E-NNI)
Service Provider B Admin Domain
I-NNI
Domain A1 Domain A2
E-NNI
Internal-Network Network Interface (I-NNI)
I-NNI
UserDomain A
UserDomain Z
User to Network Interface (UNI)
Service provider 1
I-NNI
(OIF UNI 1.0 & 2.0)
(OIF UNI 1.0 & 2.0)
(OIF NNI 1.0)
Intra-carrier External Network Network Interface(E-NNI)
OIF Interoperability Agreements OIF develops interoperability agreements
and manages interoperability testing:• Physical Link Layer• Networking
Networking agreements focused on UNI and intra-carrier E-NNI• UNI 1.0 interoperability agreement finalized
November 2001• Interoperability event staged Supercomm 2001
and OFC 2003• UNI 2.0 interoperability agreement in progress• NNI 1.0 interoperability agreement in progress
• Capabilities demonstrated in early interoperability event OFC 2003
Network-to-Network Interface (NNI) NNI: interworking between “control
domains” to provide:• Summarized topology and reachability
information across domains• Signaling for connection establishment,
removal and restoration Immediate NNI applications:
• Interworking between (already deployed) proprietary control planes
• Scalability • Interworking different transport network
technologies• E.g., all-optical and opto-electronic
NNI 1.0 is scoped to intra-carrier E-NNI
Intra-Carrier NNIMetro-Core Example
MetroMetro
Intercity Intercity
MetroMetro
CustomersCustomers
•Different metro / core domains•Different economics•Different services
Dissimilar control issues Different vendors Multiple profit centers
NNI
Optical User to Network Interface(O-UNI)
O-UNI: allows clients (e.g., IP routers) to dynamically request bandwidth from the intelligent optical network• Signaling for connection establishment,
modification, deletion and query• No topology information exchanged between
IP and optical network Potential UNI applications:
• Reduced operations overheads – simplified provisioning of new IP router connectivity
• New services: bandwidth on demand, optical Virtual Private Networks (VPNs)
• Integrated IP and optical failure recovery mechanisms
O-UNI
UNI
Connection request
Client requests new connection between client source and client destination
Client sees optical network as a “cloud” Optical network responsible for routing connection
to client destination
OpticalNetwork
Conclusions
Intelligent optical networking is a reality• Large scale network deployments• End-to-end provisioning
Implementation agreements and standards are critical to future intelligent optical networks• Network-to-Network Interface (NNI)• Optical User to Network Interface (UNI)
Carrier participation ensures that developing implementation agreements and standards meet network and service requirements