[  254.720234] br0: port 1(dummy0) entered disabled state
[  254.781445] br0: port 1(dummy0) entered listening state
[  255.886929] br0: port 1(dummy0) entered learning state
[  255.944326] br0: port 1(dummy0) entered forwarding state
[  256.001166] br0: port 1(dummy0) entered forwarding state
[  271.159233] br0: port 1(dummy0) entered disabled state
[  271.181363] br0: port 1(dummy0) entered blocking state
[  271.181369] br0: port 1(dummy0) entered listening state
[  291.266429] br0: port 1(dummy0) entered learning state
[  311.746326] br0: port 1(dummy0) entered forwarding state
[  311.746352] br0: topology change detected, propagating
[  331.487050] br0: port 1(dummy0) entered disabled state
[  331.507353] device dummy0 left promiscuous mode
[  331.507377] br0: port 1(dummy0) entered disabled state