[ 1905.402873] br0: port 1(dummy0) entered blocking state
[ 1905.402909] br0: port 1(dummy0) entered disabled state
[ 1905.403000] dummy0: entered allmulticast mode
[ 1905.403077] dummy0: entered promiscuous mode
[ 1905.407048] br0: port 1(dummy0) entered blocking state
[ 1905.407072] br0: port 1(dummy0) entered forwarding state
[ 1905.692858] dummy0: left allmulticast mode
[ 1905.692891] dummy0: left promiscuous mode
[ 1905.692947] br0: port 1(dummy0) entered disabled state