[ 1831.182219] br0: port 1(dummy0) entered blocking state
[ 1831.182260] br0: port 1(dummy0) entered disabled state
[ 1831.182293] dummy0: entered allmulticast mode
[ 1831.182359] dummy0: entered promiscuous mode
[ 1831.186357] br0: port 1(dummy0) entered blocking state
[ 1831.186430] br0: port 1(dummy0) entered forwarding state
[ 1831.458272] dummy0: left allmulticast mode
[ 1831.458354] dummy0: left promiscuous mode
[ 1831.458421] br0: port 1(dummy0) entered disabled state