[ 1875.655755] br0: port 1(dummy0) entered blocking state
[ 1875.655824] br0: port 1(dummy0) entered disabled state
[ 1875.655894] dummy0: entered allmulticast mode
[ 1875.655977] dummy0: entered promiscuous mode
[ 1875.659609] br0: port 1(dummy0) entered blocking state
[ 1875.659641] br0: port 1(dummy0) entered forwarding state
[ 1875.920731] dummy0: left allmulticast mode
[ 1875.920759] dummy0: left promiscuous mode
[ 1875.920783] br0: port 1(dummy0) entered disabled state