Allied Telesis OpenFlow (v. 1.3) - subscription license (1 year) - 1 license

The OpenFlow protocol is a network protocol closely associated with Software-Defined Networking (SDN). SDN is a network architecture that allows network administrators to control traffic from a centralized Controller. A Controller is an application that manages flow control in a SDN environment. The OpenFlow protocol allows a server to instruct network switches where to send data packets.