[ 1843.220338] br0: port 1(dummy0) entered blocking state
[ 1843.220383] br0: port 1(dummy0) entered disabled state
[ 1843.220426] dummy0: entered allmulticast mode
[ 1843.220486] dummy0: entered promiscuous mode
[ 1843.224097] br0: port 1(dummy0) entered blocking state
[ 1843.224132] br0: port 1(dummy0) entered forwarding state
[ 1843.501594] dummy0: left allmulticast mode
[ 1843.501647] dummy0: left promiscuous mode
[ 1843.501676] br0: port 1(dummy0) entered disabled state