[ 1871.491819] br0: port 1(dummy0) entered blocking state
[ 1871.491860] br0: port 1(dummy0) entered disabled state
[ 1871.491895] dummy0: entered allmulticast mode
[ 1871.491945] dummy0: entered promiscuous mode
[ 1871.495342] br0: port 1(dummy0) entered blocking state
[ 1871.495375] br0: port 1(dummy0) entered forwarding state
[ 1871.710623] dummy0: left allmulticast mode
[ 1871.710653] dummy0: left promiscuous mode
[ 1871.710683] br0: port 1(dummy0) entered disabled state