OpenDaylight Project

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The OpenDaylight Project
Open Source project under The Linux Foundation
FoundedApril 8, 2013
HeadquartersSan Francisco, Calif.
Key people
Phil Robb, Executive Director

The OpenDaylight Project is a collaborative open source project hosted by The Linux Foundation. The goal of the project is to promote software-defined networking (SDN) and network functions virtualization (NFV). The software is written in the Java programming language.


On February 8, 2013, a software defined networking site reported an industry coalition forming around SDN. The goal of the coalition was not known at the time, with most information consisting of rumors and insider discussions.[1]

On April 8, 2013, The Linux Foundation announced the founding of the OpenDaylight Project as a community-led and industry-supported open source framework to accelerate adoption, foster new innovation and create a more open and transparent approach to Software-Defined Networking (SDN) and Network Functions Virtualization (NFV).[2][3] The project’s founding members were Arista Networks, Big Switch Networks, Brocade (product spun-off with Lumina Networks), Cisco, Citrix, Ericsson, HP, IBM, Juniper Networks, Microsoft, NEC, Nuage Networks, PLUMgrid, Red Hat and VMware.[4]

Reaction to the goals of open architecture and administration by the Linux Foundation have been mostly positive.[5][6] While initial criticism centered on concerns that this group could be used by incumbent technology vendors to stifle innovation, most of the companies signed up as members do not actually sell incumbent networking technology.[7] Of the original Platinum members, Ericsson, Intel, IBM, Microsoft, VMware, Red Hat, and Citrix would not be considered "incumbent" technology providers in the networking segment. Only Lumina, Cisco and Hewlett Packard Enterprise would typically fall into that category.[8]

By 2015, user companies had begun participating in upstream development, and by the Boron release in September 2016, half of new projects were proposed by user organizations, including Comcast, Intel, AT&T and Telefonica.[9] At the time of the Carbon release in May 2017, the Project estimated that over 1 Billion subscribers were accessing OpenDaylight-based networks, in addition to use within large enterprises.[10]


OpenDaylight supports technology such as OpenFlow. The first code from the OpenDaylight project, named Hydrogen, was released in February 2014.[11][12]

A source code repository includes contributed source code initially seeded from Big Switch Networks, Cisco and NEC.[13] There are now over 1000 cumulative contributors from a variety of organizations as well as unassociated individuals. There is a dedicated OpenDaylight wiki, and several mailing lists are available.[14][15] These resources are aimed at developers wishing to contribute to the project, as well as others interested in learning about specific sub-projects.

The software is written in Java.


The following lists the different OpenDaylight releases:

Release Name Release Date
Hydrogen February 2014
Helium October 2014
Lithium June 2015
Beryllium February 2016
Boron November 2016
Carbon June 2017
Nitrogen September 2017
Oxygen March 2018
Fluorine August 2018
Neon March 2019
Sodium September 2019


Originally there were three tiers of membership for OpenDaylight: Platinum, Gold and Silver, with varying levels of commitment. Each Platinum member must contribute 10 developers to the project while Gold members must contribute 3 developers.[16][17]

As of January, 2018, OpenDaylight became a project within the LF Networking Fund,[18] which consolidated membership across multiple projects into a common governance structure. Most OpenDaylight members became members of the new LF Networking fund.

See also[edit]


  1. ^ Palmer,Matthew "Exclusive: Shining the Spotlight on OpenDaylight-What you MUST know about the new open-source SDN Controller" (2013) [1]
  2. ^ "Industry Leaders Collaborate on OpenDaylight Project, Donate Key Technologies to Accelerate Software-Defined Networking". Linux Foundation. Retrieved 20 November 2017.
  3. ^ "OpenDaylight: A big step toward the software-defined data center". InfoWorld. April 8, 2013. Retrieved November 18, 2013.
  4. ^ "Industry Leaders Collaborate on OpenDaylight Project, Donate Key Technologies to Accelerate Software-Defined Networking" (Press release). April 8, 2013. Retrieved November 18, 2013.
  5. ^ Hinkle, Mark "The Linux Foundation’s Collaboration – OpenDaylight Project – Open Source SDN" (4/08/2013) [2]
  6. ^ McNickle, Michelle "SDN blog roundup: Open Daylight, Cisco's networking truths, OpenStack" (2013) [3]
  7. ^ Duffy, Jim "Skepticism follows Cisco-IBM led OpenDaylight SDN consortium" (4/10/2013) [4]
  8. ^ McGillicuddy, Shamus "Keeping OpenDaylight truly open: Q&A with Brocade's Dave Meyer" (5/3/2013) [5]
  9. ^ "OpenDaylight Project Releases Boron for Network-Driven Businesses" (9/21/2016) [6]
  10. ^ "Carbon: Fertile Ground for New Use Cases"
  11. ^ "OpenDaylight SDN opens the curtains on its initial release". ZDNet. September 12, 2013. Retrieved November 18, 2013.
  12. ^ First release (Hydrogen) announcement
  13. ^ Gerrit Code Review. Retrieved on 2014-05-23.
  14. ^ Open Daylight Wiki
  15. ^ Open Daylight Developer's Mailing List
  16. ^ SearchOracle accessdate=2014-08-19
  17. ^ Open Daylight Members accessdate=2014-03-11
  18. ^

External links[edit]