[SteveNuts]

Also check out Open vSwitch http://openvswitch.org/

We use it to add bridged adapters with VLAN tags to our hypervisors

[bogomipz]

I'm not sure if this is still the case but the linux bridge had(has?) a limit of 1024 ports. OVS does not have this. Also OVS can give you GRE and VXVLAN as well.

[_a_user_so_good]

Yeah, it's pretty neat as well.