Abstract—Better cost effectiveness of Software-Defined Network(SDN) is motivating enterprises to adopt it in Wide Area Network(WAN). The idea is then called Software-Defined Wide Area Network(SD-WAN). In this paper, first we review the architecture of SDN, which provide theoretical support for SD-WAN. Then we analyze three typical SD-WAN realizations, which are Google’s B4, Microsoft’s SWAN and Software-Defined Internet eXchange Point respectively. Finally, we make a conclusion and discuss future works.

Index Terms —SD-WAN, B4, SWAN, SDX, survey



Cite: Xugang Wu, Kai Lu, and Guoliang Zhu  " A Survey on Software-Defined Wide Area Networks," Journal of Communications, vol. 13, no. 5, pp. 253-258, 2018. Doi: 10.12720/jcm.13.5.253-258.