[ 1708.366556] br0: port 1(dummy0) entered blocking state
[ 1708.366602] br0: port 1(dummy0) entered disabled state
[ 1708.366636] dummy0: entered allmulticast mode
[ 1708.366687] dummy0: entered promiscuous mode
[ 1708.369187] br0: port 1(dummy0) entered blocking state
[ 1708.369248] br0: port 1(dummy0) entered forwarding state
[ 1708.543025] dummy0: left allmulticast mode
[ 1708.543091] dummy0: left promiscuous mode
[ 1708.543151] br0: port 1(dummy0) entered disabled state