[ 1904.721972] br0: port 1(dummy0) entered blocking state
[ 1904.722053] br0: port 1(dummy0) entered disabled state
[ 1904.722132] dummy0: entered allmulticast mode
[ 1904.722215] dummy0: entered promiscuous mode
[ 1904.725770] br0: port 1(dummy0) entered blocking state
[ 1904.725804] br0: port 1(dummy0) entered forwarding state
[ 1904.980525] dummy0: left allmulticast mode
[ 1904.980567] dummy0: left promiscuous mode
[ 1904.980597] br0: port 1(dummy0) entered disabled state