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In many real-world OpenFlow-based SDN deployments, the ability to programheterogeneous forwarding elements built with different forwarding architecturesis a desirable capability. In this paper, we discuss a data plane programmingframework suitable for a flexible and protocol-oblivious data plane and showhow OpenFlow can evolve to provide a generic interface for platform-independentprogramming and platform-specific compiling. We also show how an abstractinstruction set can play a pivotal role to support different programming stylesmapping to different forwarding chip architectures. As an example, we comparethe compiler-mode and interpreter-mode implementations for an NPU-basedforwarding element and conclude that the compiler-mode implementation canachieve a performance similar to that of a conventional non-SDN implementation.Built upon our protocol-oblivious forwarding (POF) vision, this work presentsour continuous efforts to complete the ecosystem and pave the SDN evolvingpath. The programming framework could be considered as a proposal for theOpenFlow 2.0 standard.

Unified POF Programming for Diversified SDN Data Plane