Enabling shared control and trust in hybrid SDN/Legacy networks

Pinyi Shi, Sergio Rivera, Lowell Pike, Zongming Fei, James Griffioen, Kenneth Calvert

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


A key concept of software-defined networking (SDN) is separation of the control and data plane. This idea provides several benefits, including fine-grained network control and monitoring, and the ability to deploy new services in a limited scope. Unfortunately, it is often cost-prohibitive for enterprises (and universities in particular) to upgrade their existing networks to wholly SDN-capable networks all at once. A compromise solution is to deploy SDN capabilities incrementally in the network. The challenge then is to take full advantage of SDN-based services throughout the network, in an integrated fashion rather than in a few "islands" of SDN support. At the University of Kentucky, SDN has been integrated into the campus network for several years. In this paper, we describe two aspects of this challenge, along with our solution approaches. One is the general reluctance of campus network administrations to allow novel or experimental (SDN-based) services in the production network. The other is how to extend such services throughout the legacy part of the network. For the former, we lay out a set of principles designed to ensure that the production service is not harmed. For the latter, we use policy based routing and a graph database to extend our previously-described VIP Lanes service. Our simulation results in a campus-like topology testbed show that we can provide a host with custom path service even if it is connected to a legacy router.

Original languageEnglish
Title of host publicationICCCN 2019 - 28th International Conference on Computer Communications and Networks
ISBN (Electronic)9781728118567
StatePublished - Jul 2019
Event28th International Conference on Computer Communications and Networks, ICCCN 2019 - Valencia, Spain
Duration: Jul 29 2019Aug 1 2019

Publication series

NameProceedings - International Conference on Computer Communications and Networks, ICCCN
ISSN (Print)1095-2055


Conference28th International Conference on Computer Communications and Networks, ICCCN 2019

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work was supported in part by the National Science Foundation under Grants ACI-1541380, ACI-1541426, ACI-1642134, and CNS-1551453. The work of Calvert was supported while he was on assignment at the National Science Foundation.

Publisher Copyright:
© 2019 IEEE.


  • Campus network
  • Hybrid network
  • Legacy routers
  • Software defined networks

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software


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