NDLI: Investigation on software-defined networks’ reactive routing against BitTorrent

Content Provider	IET Digital Library
Author	Vicino, D. Lung, C. H. Wainer, G. Dalle, O.
Abstract	Technologies in software-defined networks (SDNs) introduce programmatic ways to reorganise the network logical topology. A possible practical usage of SDNs is reactive routing, where the logical topology is continuously evolving based on traffic statistics and policies. Usually, the SDNs controllers are considered transparent to the higher layers. It is expected that changes in logical topology may not affect applications. The goal is to study the impact of logical topology changes on BitTorrent, a popular peer-to-peer protocol in practice. This study focuses on BitTorrent, and the experimental results show that BitTorrent may produce the opposite effect to the one expected. The authors have run 32 BitTorrent clients in an emulated SDN ring topology and changed the virtual topology periodically by removing one link at the time from the ring. The experiments produced lower propagation when logical topology changed periodically than when it was static for BitTorrent traffic. For comparison, the same experiments were recreated using HTTP. For HTTP, slower propagation is obtained when logical topology changed than when it was static. Finally, the results are discussed and it has been concluded that high layer protocols need to be carefully studied, and in some cases adapted, before being deployed in SDNs.
Starting Page	249
Ending Page	254
Page Count	6
ISSN	20474954
Volume Number	4
e-ISSN	20474962
Issue Number	Issue 5, Sep (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-net/4/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-net.2014.0105
Journal	IET Networks
Publisher Date	2015-04-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	BitTorrent Communication Network Design, Planning And Routing Computer Communication Computer Network And Technique HTTP Network Logical Topology Peer-to-peer Computing Peer-to-peer Protocol Protocol Reactive Routing SDN Ring Topology Software Defined Networking Software-defined Network Telecommunication Network Routing Telecommunication Network Topology Telecommunication Traffic Traffic Policy Traffic Statistics Transport Protocol Virtual Topology
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Management Science and Operations Research Computer Networks and Communications

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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