[  250.497082] br0: port 1(dummy0) entered blocking state
[  250.497165] br0: port 1(dummy0) entered disabled state
[  250.497234] dummy0: entered allmulticast mode
[  250.497327] dummy0: entered promiscuous mode
[  250.500310] br0: port 1(dummy0) entered blocking state
[  250.500346] br0: port 1(dummy0) entered forwarding state
[  250.686556] dummy0: left allmulticast mode
[  250.686590] dummy0: left promiscuous mode
[  250.686620] br0: port 1(dummy0) entered disabled state