Abstract-Information-Centric Networking (ICN) has emerged as an interesting approach to overcome many of the limitations of legacy IP-based networks. However, the drastic changes to legacy infrastructure required to realise an ICN have significantly hindered its adoption by network operators. As a result, alternative deployment strategies are investigated, with SoftwareDefined Networking (SDN) arising as a solution compatible with legacy infrastructure, thus opening new possibilities for integrating ICN concepts in operators' networks. This paper discusses the seamless integration of these two architectural paradigms and suggests a scalable and dynamic network topology bootstrapping and management framework to deploy and operate ICN topologies over SDN-enabled operator networks. We describe the designed protocol and supporting mechanisms, as well as the minimum required implementation to realize this inter-operability. A proof-of-concept prototype has been implemented to validate the feasibility of the approach. Results show that topology bootstrapping time is not significantly affected by the topology size, substantially facilitating the intelligent management of an ICN-enabled network.
I. MOTIVATIONInformation-centric networking (ICN) and software defined networking (SDN) have emerged to address the rapid increase in traffic demands and operational requirements of business applications. However, the majority of ICN propositions suggest replacing legacy network protocols and infrastructure with information-centric alternatives. This brings severe barriers to the adoption of the ICN paradigm, as network operators resist such costly and disruptive changes. On the other hand, SDN builds on backward compatibility, facilitating adoption by network and service providers, which have already started incorporating SDN capabilities into their networks. The emergence of SDN creates new opportunities for deploying the novel routing mechanisms brought by the ICN paradigm, bringing its adoption by Internet stakeholders closer to reality.Focusing on backward compatibility, POINT [1] takes an alternative migration path that suggests the realization of legacy IP services on top of ICN and enabling the network operators to benefit from ICN core functions e.g., multicast and in-network caching. The envisioned strategy includes the deployment of gateways at the edges of IP networks, to map IP-based protocols to ICN semantics, whilst supporting ICN in the network core. The network core design subsequently builds on SDN primitives to enable an IP/backwards-compatible architecture utilizing the PURSUIT [2] publish/subscribe communication paradigm. SDN switching [3] is employed for the support of a source-routing forwarding mechanism [4], enabling stateless, fast and scalable content forwarding. This allows the seamless deployment of ICN topologies over SDN networks and opens a potential migration path for ICN from Internet stakeholders.In this context, support for this transparent ICN operation heavily depends on the appropriate conf...