titan xen # brctl show
bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              vif0.0
                                                        peth0
                                                        xeng253.0
                                                        xeng252.0
                                                        xeng244.0
                                                        xeng251.0
xenbr1          8000.8a93849d0b08       no              dummy0
                                                        xeng251.1