OIF Announces Participants in 2020 Joint Network Operator, Multi-Vendor Transport SDN API Interoperability Demonstration

Interoperability is vital to facilitating operator deployment of SDN and accelerating transport network transformation for the 5G era

Fremont, Calif. —June 16, 2020 – Leading the acceleration of the commercialization of transport SDN worldwide and transport network transformation for the 5G era, OIF today announced plans for its 2020 Transport SDN Application Programming Interface (API) interoperability demonstration.

The 2020 event will focus on SDN-based programmability, control and automation and showcase testing in Telefonica’s lab in Europe over a six-week period (September to October).

Building on OIF’s 2018 and 2016 interoperability demonstrations that helped establish ONF Transport-API (T-API) as the defacto northbound interface (NBI) standard, the 2020 demonstration will test Ethernet, Layer 1 OTN and Layer 0 OTN control using ONF T-API 2.1.3, with additional testing of OpenConfig device APIs for transport equipment in network-operator-defined use cases.

Manageability and flexibility of the network are critical to allow network operators to successfully deliver a range of cloud-based services, meet dynamic bandwidth demands, and to accelerate transport network transformation for the 5G era. Established open Transport SDN APIs can help network operators:

  • improve network agility to adapt to dynamic service demands and traffic patterns
  • improve service provisioning and time-to-revenue
  • reduce maintenance and management with simplified control and automation

The multi-vendor interoperability demonstration includes participating vendors ADVA, Ciena, Cisco Systems, Infinera and Nokia. China Telecom and Telia are participating as consulting network operators.

“Widespread adoption of transport SDN is a must for network operators to accelerate their transformation for the 5G era and reap the benefits of a more dynamic and open network,” said Dave Brown, Nokia and OIF Officer – Director of Communications. “OIF’s facilitation of this thorough test of specifications and interoperability of open transport SDN APIs will highlight the tools necessary to create an open manageable, flexible network.”

“Interoperability is the key success factor for SDN deployment in production networks,” said Arturo Mayoral, Telefónica Transport Global CTIO Unit – Technology Expert and Lead of Optical SDN strategy. “This OIF interop event arrives at the perfect moment to evaluate maturity of the commercial solutions, fostered by the recent efforts done by Telefónica through the iFUSION project, in the design of reference implementations based on ONF T-API and OpenConfig standards.”

Public read-out events highlighting the results of the testing will take place at select industry events in Q4 2020. In Q1 2021, OIF will hold a webinar and launch a whitepaper describing the results of the event. Additional information can be found at

About the 2020 OIF Transport SDN Application Programming Interface (API) Interoperability Demonstration

Leading the acceleration of the commercialization of transport SDN worldwide and transport network transformation for the 5G era, Optical Internetworking Forum (OIF), will bring new use cases and deployment scenarios into Telefonica’s lab to test multi-vendor interoperability of Ethernet, Layer 1 OTN, Layer 0 OTN control using ONF T-API 2.1.3 and OpenConfig device APIs. The 2020 Transport SDN Application Programming Interface (API) interoperability demonstration builds on OIF’s previous transport API requirements and interoperability demonstrations which substantiated T-API as the northbound interface (NBI) of choice, establishing a foundation for open, programmable networks that allow network operators to efficiently deliver dynamic multi-domain connectivity services to the market.

About OIF

OIF is where the optical networking industry’s interoperability work gets done. Building on 20 years of effecting forward change in the industry, OIF represents the dynamic ecosystem of 100+ industry leading network operators, system vendors, component vendors and test equipment vendors collaborating to develop interoperable electrical, optical and control solutions that directly impact the industry’s ecosystem and facilitate global connectivity in the open network world. Connect with OIF at @OIForum, on LinkedIn and at


PR Contact:

Leah Wilkinson

Wilkinson + Associates for OIF


Office: 703-907-0010



OIF Launches New Project to Identify APIs for Transport SDN

Close on the heels of the joint Optical Internetworking Forum (OIF) and Open Networking Foundation (ONF) Global Transport SDN demonstration that concluded in October, the OIF has launched a new project to develop implementation agreements (IAs) for the application programming interfaces (APIs) used between application and network controller during the event. The new initiative will build on the Service Request and Topology APIs prototyped in the demonstration, culminating in IAs for use by carriers and equipment vendors. The new initiative will also create IAs for Service Request, Path Computation, Topology and Link Resource Manager interfaces that have been identified as part of the OIF’s upcoming SDN Framework document. The APIs to be delivered by the new project are based on REST and JSON principles enabling rapid and flexible application development.

“The prototype Transport SDN demonstration revealed a lack of definition for how user applications interact with transport network applications and resource functions,” said Jonathan Sadler, of Coriant and the OIF technical committee vice chair. “The programmability of Transport SDN requires some of the internal interfaces used by ASON to become open.”

In particular, a Service API is important as it allows applications to request connectivity services from the network. Having a common Service API allows a variety of applications to access services provided by the network, particularly in an environment with multiple domains with potentially different underlying control methods.

During the Global Transport SDN demonstration, different domains supported a number of South-Bound Interfaces (SBIs) with the Domain controller, including vendor-specific, standard OpenFlow version 1.3, and OpenFlow with optical extensions. The use of a common Service API allowed the same application to be tested across these heterogeneous domains.

Similarly, the Topology API allows applications to understand the connectivity available in the network.  A common Topology API allows a variety of applications to access network topology information, enabling support for new constraints and service criteria.

The Global Transport SDN demonstration implemented a prototype Topology API. Different domains exported their topology information enabling path computation to be performed outside of the controller.  These paths could then be requested using the Service API.  Additionally, the Service API responses had references to links and nodes in the topology, enabling the activated path to be shown.

Leadership Elections

The Forum conducted its annual leadership election with Doug Zuckerman of Applied Communication Sciences and Junjie Li with China Telecom elected to the OIF board of directors for one-year terms. Officers re-elected to two-year terms include Dave Brown of Alcatel-Lucent, vice president of marketing; Dave Stauffer, of Kandou Bus, secretary/treasurer; John McDonough, NEC Corp of America, vice president; and Torsten Wuth, of Coriant, Physical Layer User Group working group chair.

About the OIF
Launched in 1998, the OIF is the first industry group to unite representatives from data and optical networking disciplines, including many of the world’s leading carriers, component manufacturers and system vendors. The OIF promotes the development and deployment of interoperable networking solutions and services through the creation of Implementation Agreements (IAs) for optical, interconnect, network processing, component and networking systems technologies. The OIF actively supports and extends the work of standards bodies and industry forums with the goal of promoting worldwide compatibility of optical internetworking products. Information on the OIF can be found at