xenbr0          8000.feffffffffff       no              peth0
                                                        vif0.0
                                                        vif1.0
xenbr1          8000.feffffffffff       no              vif1.1
xenbr2          8000.feffffffffff       no              vif1.2
xenbr3          8000.000000000000       no               can't get port info: Function not implemented