J Supercomput https://doi.org/10.1007/s11227-018-2282-0 Logically isolated group network for virtual convergence environment over SD-WAN Dongkyun Kim 1 · Yong-Hwan Kim 1 · Ki-Hyun Kim 1 · Joo-Beom Kim 1 · Gi-Seong You 1 · Joon-Min Gil 2 © Springer Science+Business Media, LLC, part of Springer Nature 2018 Abstract Software-defined wide-area network (SD-WAN) is gaining strong momen- tum as distributed cloud evolves. The new cloud infrastructure requires novel and innovative network technologies based on virtualization, automated resource (e.g., datacenters, VMs, networks) convergence, ultra-high data-forwarding performance, and strict network security. To meet the demands, this paper suggests a scheme for logically isolated group network for virtual convergence environment and evaluates its performance in terms of virtual network generation performance over the de facto SD-WAN infrastructure deployed on the advanced research network (KREONET), which operates in six distant cities in Korea and the USA. Keywords SD-WAN · Distributed cloud · Virtual convergence network B Joon-Min Gil joonmin.gil@gmail.com; jmgil@cu.ac.kr Dongkyun Kim mirr@kisti.re.kr Yong-Hwan Kim yh.kim086@kisti.re.kr Ki-Hyun Kim kkh1258@kisti.re.kr Joo-Beom Kim parkroyal@kisti.re.kr Gi-Seong You ksyu@kisti.re.kr 1 Korea Institute of Science and Technology Information, 245 Daehangno, Yuseong, Daejeon, South Korea 2 Daegu Catholic University, 13-13 Hayang-ro, Hayang-eup, Gyeongsan, Gyeongbuk, South Korea 123