OVSDB support with Contrail

Open vSwitch Database (OVSDB) management protocol provides a means through which a Contrail controller and a switch can communicate. In an environment in which Contrail Release 2.20 is deployed, a Contrail controller and a switch can exchange control and statistical information, thereby enabling virtual machine (VM) traffic from entities in a virtualized network to be forwarded to entities in a physical network and the reverse.