M. Suñé, V. Alvarez, T. Jungel, U. Toseef, K. Pentikousis
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OpenFlow is catalyzing the deployment of software defined networking (SDN) technologies around the globe. In practice, however, compatibility issues hinder the deployment of an OpenFlow control plane on a number of network platforms. The FP7 ALIEN project addresses this problem by introducing a Hardware Abstraction Layer (HAL) which enables OpenFlow capabilities on legacy network elements. This paper presents the implementation of a HAL on programmable network platforms with multi-core CPUs and summarizes the implementation experience gained in the process.