[ 1910.368861] br0: port 1(dummy0) entered blocking state
[ 1910.368907] br0: port 1(dummy0) entered disabled state
[ 1910.368940] dummy0: entered allmulticast mode
[ 1910.368987] dummy0: entered promiscuous mode
[ 1910.372627] br0: port 1(dummy0) entered blocking state
[ 1910.372692] br0: port 1(dummy0) entered forwarding state
[ 1910.636634] dummy0: left allmulticast mode
[ 1910.636670] dummy0: left promiscuous mode
[ 1910.636703] br0: port 1(dummy0) entered disabled state