[ 1737.289077] br0: port 1(dummy0) entered blocking state
[ 1737.289159] br0: port 1(dummy0) entered disabled state
[ 1737.289229] dummy0: entered allmulticast mode
[ 1737.289314] dummy0: entered promiscuous mode
[ 1737.292138] br0: port 1(dummy0) entered blocking state
[ 1737.292170] br0: port 1(dummy0) entered forwarding state
[ 1737.475857] dummy0: left allmulticast mode
[ 1737.475894] dummy0: left promiscuous mode
[ 1737.475921] br0: port 1(dummy0) entered disabled state