[  296.789856] br0: port 1(dummy0) entered disabled state
[  296.844728] br0: port 1(dummy0) entered listening state
[  297.957320] br0: port 1(dummy0) entered learning state
[  298.008441] br0: port 1(dummy0) entered forwarding state
[  298.062203] br0: port 1(dummy0) entered forwarding state
[  313.206520] br0: port 1(dummy0) entered disabled state
[  313.228991] br0: port 1(dummy0) entered blocking state
[  313.228997] br0: port 1(dummy0) entered listening state
[  333.674563] br0: port 1(dummy0) entered learning state
[  354.154621] br0: port 1(dummy0) entered forwarding state
[  354.154633] br0: topology change detected, propagating
[  373.508995] br0: port 1(dummy0) entered disabled state
[  373.528739] device dummy0 left promiscuous mode
[  373.528766] br0: port 1(dummy0) entered disabled state