[ 1883.489268] br0: port 1(dummy0) entered blocking state
[ 1883.489305] br0: port 1(dummy0) entered disabled state
[ 1883.489341] dummy0: entered allmulticast mode
[ 1883.489389] dummy0: entered promiscuous mode
[ 1883.492919] br0: port 1(dummy0) entered blocking state
[ 1883.492984] br0: port 1(dummy0) entered forwarding state
[ 1883.739679] dummy0: left allmulticast mode
[ 1883.739743] dummy0: left promiscuous mode
[ 1883.739820] br0: port 1(dummy0) entered disabled state