[  552.508049] br0: port 1(dummy0) entered blocking state
[  552.508072] br0: port 1(dummy0) entered disabled state
[  552.508178] device dummy0 entered promiscuous mode
[  552.579893] br0: port 1(dummy0) entered blocking state
[  552.579909] br0: port 1(dummy0) entered forwarding state
[  552.848748] br0: port 1(dummy0) entered disabled state
[  552.969544] device dummy0 left promiscuous mode
[  552.969587] br0: port 1(dummy0) entered disabled state