[ 1688.354376] br0: port 1(dummy0) entered blocking state
[ 1688.354417] br0: port 1(dummy0) entered disabled state
[ 1688.354453] dummy0: entered allmulticast mode
[ 1688.354508] dummy0: entered promiscuous mode
[ 1688.357475] br0: port 1(dummy0) entered blocking state
[ 1688.357507] br0: port 1(dummy0) entered forwarding state
[ 1688.565902] dummy0: left allmulticast mode
[ 1688.565935] dummy0: left promiscuous mode
[ 1688.565967] br0: port 1(dummy0) entered disabled state