[ 1750.907112] br0: port 1(dummy0) entered blocking state
[ 1750.907157] br0: port 1(dummy0) entered disabled state
[ 1750.907188] dummy0: entered allmulticast mode
[ 1750.907234] dummy0: entered promiscuous mode
[ 1750.909786] br0: port 1(dummy0) entered blocking state
[ 1750.909847] br0: port 1(dummy0) entered forwarding state
[ 1751.106797] dummy0: left allmulticast mode
[ 1751.106857] dummy0: left promiscuous mode
[ 1751.106887] br0: port 1(dummy0) entered disabled state