[ 1800.499234] br0: port 1(dummy0) entered blocking state
[ 1800.499267] br0: port 1(dummy0) entered disabled state
[ 1800.499305] dummy0: entered allmulticast mode
[ 1800.499356] dummy0: entered promiscuous mode
[ 1800.502829] br0: port 1(dummy0) entered blocking state
[ 1800.502892] br0: port 1(dummy0) entered forwarding state
[ 1800.747795] dummy0: left allmulticast mode
[ 1800.747855] dummy0: left promiscuous mode
[ 1800.747918] br0: port 1(dummy0) entered disabled state