Impact of SDN Controllers Deployment on Network Availability

Software-defined networking (SDN) promises to improve the programmability and flexibility of networks, but it may bring also new challenges that need to be explored. The purpose of this technical report is to assess how the deployment of the SDN controllers affects the overall availability of SDN. For this, we have varied the number, homing and location of SDN controllers. A two-level modelling approach that is used to evaluate the availability of the studied scenarios. Our results show how network operators can use the approach to find the optimal cost implied by the connectivity of the SDN control platform by keeping high levels of availability.

[1]  P. Demeester,et al.  General availability model for multilayer transport networks , 2005, DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005..

[2]  Poul E. Heegaard,et al.  Managed Dependability in Interacting Systems , 2016 .

[3]  Thierry Turletti,et al.  A Survey of Software-Defined Networking: Past, Present, and Future of Programmable Networks , 2014, IEEE Communications Surveys & Tutorials.

[4]  Poul E. Heegaard,et al.  Availability Modelling of Software-Defined Backbone Networks , 2016, 2016 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshop (DSN-W).

[5]  Kishor S. Trivedi,et al.  A Decomposition Approach for Stochastic Reward Net Models , 1993, Perform. Evaluation.

[6]  Kostas Pentikousis,et al.  Software-Defined Networking (SDN): Layers and Architecture Terminology , 2015, RFC.

[7]  Poul E. Heegaard,et al.  Achieving dependability in software-defined networking — A perspective , 2015, 2015 7th International Workshop on Reliable Networks Design and Modeling (RNDM).

[8]  Ilkka Norros,et al.  On/off process modeling of IP network failures , 2010, 2010 IEEE/IFIP International Conference on Dependable Systems & Networks (DSN).

[9]  Jim Esch,et al.  Software-Defined Networking: A Comprehensive Survey , 2015, Proc. IEEE.

[10]  Andrés J. Gonzalez,et al.  Characterisation of router and link failure processes in UNINETT's IP backbone network , 2012, Int. J. Space Based Situated Comput..