[ 1967.234710] br0: port 1(dummy0) entered blocking state
[ 1967.234735] br0: port 1(dummy0) entered disabled state
[ 1967.234753] dummy0: entered allmulticast mode
[ 1967.234789] dummy0: entered promiscuous mode
[ 1967.238458] br0: port 1(dummy0) entered blocking state
[ 1967.238479] br0: port 1(dummy0) entered forwarding state
[ 1967.519764] dummy0: left allmulticast mode
[ 1967.519787] dummy0: left promiscuous mode
[ 1967.519806] br0: port 1(dummy0) entered disabled state