[  251.719855][ T1976] br0: port 1(dummy0) entered blocking state
[  251.720180][ T1976] br0: port 1(dummy0) entered disabled state
[  251.720349][ T1976] dummy0: entered allmulticast mode
[  251.721320][ T1976] dummy0: entered promiscuous mode
[  251.754482][ T1977] br0: port 1(dummy0) entered blocking state
[  251.754704][ T1977] br0: port 1(dummy0) entered forwarding state
[  254.033986][   T12] dummy0: left allmulticast mode
[  254.034542][   T12] dummy0: left promiscuous mode
[  254.034868][   T12] br0: port 1(dummy0) entered disabled state