[ 1638.008198] br0: port 1(dummy0) entered blocking state
[ 1638.008238] br0: port 1(dummy0) entered disabled state
[ 1638.008280] dummy0: entered allmulticast mode
[ 1638.008335] dummy0: entered promiscuous mode
[ 1638.011255] br0: port 1(dummy0) entered blocking state
[ 1638.011321] br0: port 1(dummy0) entered forwarding state
[ 1638.223765] dummy0: left allmulticast mode
[ 1638.223807] dummy0: left promiscuous mode
[ 1638.223829] br0: port 1(dummy0) entered disabled state