Software-defined networking: Difference between revisions

Revision as of 20:45, 23 July 2025

Revision as of 04:08, 24 July 2025

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SDN switches can be used for RGDD via installation of rules that allow forwarding to multiple outgoing ports. For example, OpenFlow provides support for Group Tables since version 1.1<ref>{{Cite web |title= OpenFlow Switch Specification |author= B. Pfaf |display-authors=etal |date= February 28, 2011 |url= http://archive.openflow.org/documents/openflow-spec-v1.1.0.pdf |access-date= July 8, 2017 }}</ref> which makes this possible. Using SDN, a central controller can carefully and intelligently setup forwarding trees for RGDD. Such trees can be built while paying attention to network congestion/load status to improve performance. For example, MCTCP<ref>{{Cite book |author= T. Zhu |display-authors=etal |title = 2016 IEEE/ACM 24th International Symposium on Quality of Service (IWQoS)|pages = 1–10|date= October 18, 2016 |publisher= IEEE |doi= 10.1109/IWQoS.2016.7590433 |isbn = 978-1-5090-2634-0|chapter = MCTCP: Congestion-aware and robust multicast TCP in Software-Defined networks|s2cid=28159768 }}</ref> is a scheme for delivery to many nodes inside datacenters that relies on regular and structured topologies of datacenter networks while DCCast<ref>{{Cite web |title= DCCast: Efficient Point to Multipoint Transfers Across Datacenters |author= M. Noormohammadpour |display-authors=etal |date= July 10, 2017 |publisher= USENIX |url= https://www.researchgate.net/publication/316921061 |access-date= July 3, 2017 }}</ref> and QuickCast<ref>{{Cite book |title= QuickCast: Fast and Efficient Inter-Datacenter Transfers using Forwarding Tree Cohorts |author= M. Noormohammadpour |display-authors=etal |date= 2018 |url= https://www.researchgate.net/publication/322243498 |access-date= January 23, 2018 |doi= 10.31219/osf.io/uzr24 |arxiv= 1801.00837 |bibcode= 2018arXiv180100837N }}</ref> are approaches for fast and efficient data and content replication across datacenters over private WANs.

=== Non-Terrestrial Quantum Networking ===

Some studies foresee the application of the SDN paradigm for the control and management of quantum satellite networks.<ref>{{Cite journal | last1 = Chiti | first1 = Francesco | last2 = Picchi | first2 = Roberto | last3 = Pierucci | first3 = Laura | title = A survey on non-terrestrial quantum networking: Challenges and trends | journal = Computer Networks | volume = 252 | pages = 110668 | year = 2024 | doi = 10.1016/j.comnet.2024.110668 | url = https://www.sciencedirect.com/science/article/pii/S1389128624005000 }}</ref>

One study, published in 2024, presents a tailored control framework for quantum satellite networks that uses SDN principles to adaptively manage dynamic network topologies. The proposed system includes a temporal optimization method and a dedicated communication protocol designed to enhance entanglement efficiency and reduce link interruptions in highly variable orbital scenarios.<ref>{{Cite journal | last1 = Chiti | first1 = Francesco | last2 = Picchi | first2 = Roberto | last3 = Pierucci | first3 = Laura | title = Advanced Control Architectures for Quantum Satellite Temporal-Networking | journal = IEEE Access | volume = 12 | year = 2024 | pages = 43410–43421 | doi = 10.1109/ACCESS.2024.3379737 }}</ref>

==Relationship to NFV==