OpenFlow is a leading standard for Software-Defined Networking (SDN) and has already played a significant role in reshaping network infrastructures. However, a wide range of existing pro-vider domains is still not equipped with a framework that supports wider deployment of an OpenFlow-based control plane beyond Ethernet-dominated networks. We address this gap by introducing a Hardware Abstraction Layer (HAL) which can transform legacy network elements into OpenFlow capable device. This paper describes the functional architecture of HAL in details, discusses the key design aspects and explains how HAL can support a num-ber of network device classes. In addition, this paper provides the implementation details of HAL for hardware platforms such as DOCSIS (Data over Cable Service Interface Specification) and DWDM (Dense Wavelength Division Multiplexing) which have so far received little attention by the OpenFlow research commu-nity despite their wide real-world deployment.
|In preparation - 2014