The document discusses virtualization of the optical/transport network through standardized APIs. It describes the Optical Internetworking Forum's (OIF) work on developing a Virtual Transport Network Service using SDN and network virtualization. This includes decomposing virtual network services, defining service attributes, and developing APIs through cooperation between the OIF and ONF. Plans are outlined for demonstrations of interoperability between multiple carriers and vendors.

1. Virtual Transport Network Service
SDN-Based Optical Network Virtualization
Lyndon Ong
OIF MA&E Committee Co-Chair
Ciena, USA
Layer 123 NFV World Congress
Santa Clara, CA, USA
April 22, 2016

2. About the OIF
The Optical Internetworking Forum:
• Represents an end-to-end ecosystem
membership base of 100+ members
• Accelerating market adoption and
ROI for new technologies
• OIF 100G DWDM work united the industry
around a 100G framework and IAs for
photonics, FEC and module MSA
• Electrical work defines critical backplane,
chip and module interfaces for 100-400G
• Open and agile workplan
• Find gaps obstructing deployment and fill
them internally or working with other SDOs
• Distributed Control, Centralized Control –
whatever best fits operator needs!
www.oiforum.com
Network
Operators
System
Suppliers
Transceiver
Suppliers
Component
Suppliers

3. OIF’s Goals:
Transport SDN Toolkit
Essential tools for Transport SDN deployment
• Address carrier operations environment
• Brownfield as well as Greenfield
• Enable differentiated services
• Speed service development through standard network APIs
• Deliver scalability, security and high performance
• Hierarchical structure with mix of local and central functions
APIs
Services
SDN Architecture for Transport
Interoperability demos
Carrier Requirements

4. Transport Network Virtualization
Network resources dynamically allocated for high utilization
Resources can be partitioned into slices for service or user
Control exposed through open interfaces
→ Proprietary, vendor-specific silos
→ Complex to operate, integrate across
vendors/technologies
→ Logically centralized, vendor-agnostic
control and service orchestration
→ Virtualization of physical network resources
OSS Platform
Proprietary OS
Vendor X HW
Proprietary OS
Vendor Y HW
Proprietary OS
Vendor Z HW
Current Networks Software-Defined Networks
OSS Platform/SDN Apps
Virtualized Multi-vendor Multi-
domain Network
SDN SW
SDN-enabled
HW
Open APIs
Vendor EMS
SDN Control Infrastructure

5. OIF Virtual Network Service
Decomposition
Virtual networking service evolution
Each service type offers greater control
Fixed
Connection
Dynamic
Connection
Dynamic
Connection
Client
site A
Client
site B
Client site A
Client site B
Client site D
Client site C
Client site A
Client site B
Client site D
Client site C
Virtual network
with vNE & vLink
Client
controller
Ctrl of
virtual XC
Connection controlled
by network providers
Leased Line
Endpoints Only
Fixed virtual
network topology
Static
Dynamic Dynamic
Connection
Virtual network
with vNE & vLink
Client
controller Rent virtual network
resources from provider
Client site
Virtual network
recursive
creation
Client site
Client site
Client site
Client site
Client siteClient site
Dynamic/recursive virtual
network topology

6. OIF Service Definition
• Service Attributes
• Service Capabilities
• Recovery Requirements
• OAM Requirements
Harmonize Services Definitions for all players, i.e.
Transport Network Services
- Providers
- Users
- Equipment/SW Vendors

7. Working Protection
Request On Line
Real-time planning
Real-time setup
Autonomous Control
Dynamic expansion
Optimization
• Multi-level SLA
• Recovery
• Network migration
Seconds
Online
Goal: Network Slicing
Real Time
Open APIs
Robust Data Plane
Physical Optical Network
Virtual Network Topology
Network as a Service
Online Slicing
Path Computation
Survivability Analysis
Global Optimization
Tenants
T-SDN
Controller

8. SDN Virtualization Model
Multiple Client Contexts – resources and service endpoints
Controller does orchestration and virtualization of actual data plane
• https://www.opennetworking.org/images/stories/downloads/sdn-resources/technical-
reports/SDN_Architecture_for_Transport_Networks_TR522.pdf
• ONF Transport SDN Architecture – TR-522
7
SDN Parent Controller/App (Green)
Resource
Group 1
SDN Controller B
Server
Context
Server
Context
Client Context
CC m
NE1
Resource
Group 2
Server
Context
CC n
NE2
RG
B2
RG
B4
RG
B5
RG
B3
RG
B1
Data Plane
SDN Controller B
Client Context
NE NE NE
NE
NE
NE NE
NE
Orchestration and
Virtualization
SDN Controller C
Server
Context
Client Context
RG
B2
RG
B4
RG
B5
RG
B3
RG
B1

9. Transport API Development
• ONF Project closely coordinated with OIF work on VTNS
• Interface to a Transport Network Controller allowing access to Topology,
Connectivity, Virtualization and other services
• Functional Requirements in review, UML/YANG/JSON drafts available
• See https://github.com/OpenNetworkingFoundation/ONFOpenTransport
8
Topology
Service
Connectivity
Service
Path Computation
Service
Shared Network Information Context
Virtual Network
Service
Notification
Service
NENetwork Resource Groups
NENESDN Controller
NENESDN Controller
NENEApplication
Transport API
Transport API
SBIs (e.g. Openflow Optical)

10. Englewood Open
Source Project
• Bi-weekly Conference calls on
Wednesday at 6am California time
• OSSDN Englewood community web
page
• https://groups.opensourcesdn.org/wg/ENGL
EWOOD/dashboard
• Mailing list
(englewood@community.opensourcesdn.org)
• Documents
• Tasks
• Code submission on Englewood GitHub
https://github.com/OpenNetworkingFoundation/En
glewood
9
Participation is open to anyone, not only to ONF/OIF Members
Instance (e.g., ONOS, ODL)
T-API
PAL
APP1
Controller
3
Mapping
T-API interface
adapter
Restful
Handler 3
APP2

11. Demonstration Plans
Implementation Experience
• OIF/ONF Interop Demonstration
• 2016/17 Interop in planning
• Multiple carriers and vendors
expressing interest
• Equipment in carrier labs
• Optical and Ethernet switch
domains
• Variety of controllers
• Heterogeneous network
• Higher level orchestration
across domains
• Common T-API between
orchestration and controller
2014 Demonstration

12. Summary
• Virtualization of the Optical/Transport Network
• Standardized APIs to access transport services
• Cooperating SDOs and Open Source development
• Demonstration(s) planned