[ 1901.724003] br0: port 1(dummy0) entered blocking state
[ 1901.724056] br0: port 1(dummy0) entered disabled state
[ 1901.724092] dummy0: entered allmulticast mode
[ 1901.724147] dummy0: entered promiscuous mode
[ 1901.727929] br0: port 1(dummy0) entered blocking state
[ 1901.727992] br0: port 1(dummy0) entered forwarding state
[ 1902.017737] dummy0: left allmulticast mode
[ 1902.017779] dummy0: left promiscuous mode
[ 1902.017812] br0: port 1(dummy0) entered disabled state