Live distributed controller migration for software-defined data center networks

In order to manage data center networks, distributed SDN controllers such as ONOS controller have been researched and used. In this paper, we propose simple live distributed controller migration scheme and design the orchestrator for this scheme. This scheme basically transfers an distributed SDN controller from the overloaded physical machine to the under-loaded physical machine. According to experimental results, a data center network is broken without our scheme when computing load increases. On the other hands, our proposed scheme reduces an average delay as well as avoids a breakdown of the data center network.