> I immediately reproduced the problem locally. It turns out that > kvm reflects packets coming from one guest NIC on another guest > NIC, and since both are connected to the same bridge we're getting > endless packet storm. To a level when kvm process becomes 100% > busy and does not respond to anything but `kill -9'.
You created a network loop. It is working exactly as expected. Create the same topology with a physical network hub and a pair of NICs and you'll get the same end result. Paul