[  520.029838] br0: port 1(dummy0) entered blocking state
[  520.034982] br0: port 1(dummy0) entered disabled state
[  520.040341] device dummy0 entered promiscuous mode
[  520.110782] br0: port 1(dummy0) entered blocking state
[  520.115933] br0: port 1(dummy0) entered forwarding state
[  520.358047] br0: port 1(dummy0) entered disabled state
[  520.469001] device dummy0 left promiscuous mode
[  520.473610] br0: port 1(dummy0) entered disabled state