Open vSwitch is a production quality, multilayer virtual switch licensed
under the open source Apache 2.0 license. It is designed to enable massive
network automation through programmatic extension, while still supporting
standard management interfaces and protocols (e.g. NetFlow, sFlow, IPFIX,
RSPAN, CLI, LACP, 802.1ag).

Vendor Open vSwitch
Website http://openvswitch.org/
OSS