Efficient caching through stateful SDN in named data networking

Mahmood, Ahsan; Casetti, Claudio; Chiasserini, Carla Fabiana; Giaccone, Paolo; Härri, Jérôme

Named Data Networking (NDN) is an innovative paradigm to provide content based services in future networks. As compared to legacy networks, naming of network packets and in-network caching of content make NDN more feasible for content dissemination. However, the implementation of NDN requires drastic changes to the existing network infrastructure. One feasible approach is to use Software Defined Networking (SDN), according to which the control of the network is delegated
to a centralized controller, which configures the forwarding data plane. This approach leads to large signaling overhead as well as large end-to-end (e2e) delays. In order to overcome these issues, we propose to enable NDN using a stateful data plane in the
SDN network. In particular, we realize the functionality of an NDN node using a stateful SDN switch attached with a local cache for content storage, and use OpenState to implement such an approach. In our solution, no involvement of the controller
is required once the OpenState switch has been configured. We benchmark the performance of our solution against the traditional SDN approach considering several relevant metrics. Experimental results highlight the benefits of a stateful approach
and of our implementation, which avoids signaling overhead and significantly reduces e2e delays.

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© Wiley. Personal use of this material is permitted. The definitive version of this paper was published in and is available at : http://dx.doi.org/10.1002/ett.3271

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