This appliance provides an Open vSwitch, it’s based on Alpine Linux. Open vSwitch is documented at http://docs.openvswitch.org/en/stable/.
This image is derived from the GNS3 appliance, for details see https://github.com/GNS3/gns3-registry/tree/master/docker/openvswitch
The container creates bridges br0 to br3. By default all eth interfaces without network configuration are connected to br0.
The custom script
/etc/openvswitch/init.sh can be used for
additional initializations, e.g. setting an IP address to br0.