Looking here http://openstack.redhat.com/Neutron_with_OVS_and_VLANs I can read the following: "Numerous limitations have been identified which prevent using free/libre plugins such as OpenVSwitch or LinuxBridge for large scale deployments." Can someone ellaborate on these limitations ? One question comes to my mind, what happens when a VM is migrated from one compute node to another. Thanks in advance Chris