[ 1572.533791] br0: port 1(dummy0) entered blocking state
[ 1572.533830] br0: port 1(dummy0) entered disabled state
[ 1572.533866] dummy0: entered allmulticast mode
[ 1572.533921] dummy0: entered promiscuous mode
[ 1572.536482] br0: port 1(dummy0) entered blocking state
[ 1572.536545] br0: port 1(dummy0) entered forwarding state
[ 1572.720536] dummy0: left allmulticast mode
[ 1572.720578] dummy0: left promiscuous mode
[ 1572.720659] br0: port 1(dummy0) entered disabled state