Existing proposals of Software-Defined Information-Centric Networking（SDICN）are difficult to support massive content delivery and to enable respective updates of switching and buffering components.This motivates us to propose an overlay-based SDICN system

in which content request forwarding and caching run only at the edge cache nodes.Decoupling caching from switching relaxes the above limitations of the existing proposals.Centralized control derived from software-defined networking overcomes the sub-optimality problem with overlay mechanisms.Experiments based on our prototype show that the system can be naturally superposed upon a software-defined network with significant reduction of response time when a few number of cache nodes are deployed.Our results are beneficial for the extension and application of software-defined networking and information-centric networking.