Create the virtual switch on the host machine:
ovs-vsctl add-br lan0Now we have a virtual switch called lan0 :)
Next we create tap devices on the host machine so we can bind them to the guests laters.
for tap in `seq 0 15`; do ip tuntap add mode tap lan0p$tap done; # check if the interfaces are there ip tuntap list
Bring the tap interfaces up:
for tap in `seq 0 15`; do ip link set lan0p$tap up done; # check if the interface are up ip link
Now we use ovs-vsctl to "bind" the tap devices to "lan0" switch
for tap in `seq 0 15`; do ovs-vsctl add-port lan0 lan0p$tap done; # see that the tap devices are mapped to ports in lan0 ovs-vsctl list-ports lan0
Now we have 16 ports switch called lan0 with 16 tap interfaces binded to lan0 virtual switch.
Next thing is to connect virtualbox guests to it:
I assume you are using the GUI for this so under the network setting select in "Attached to" "Bridge Adapter" and in "Name" select "lan0p1" for port number 1 in the switch.
Repeat this action for each guest you want to connect to the switch.
Now your virtual machines has a virtual network ;)