EVN: An Elastic Virtual Network Supporting NFV Customized and Rapid Migration

The virtual network functions (VNF) enables to reduce reliance on expensive proprietary networking gear and increase network elasticity. In this paper, we propose an Elastic Virtual Networks (EVN) system to realize a complete virtual network layout, which supports resource customization, automated deployment, and flexible migration. Through the port and MAC address mapping, a new physical node can access the Virtual Networks (VNs), and the related VNFs are deployed through Docker. Moreover, we set up a white list function to reserve the capacity of the hosts that will be accessed in the future to facilitate a fast access. The experiment results verify that the VNF migration time in EVN by Docker improves three to four times compared with the traditional VM solution.