[ 1803.460792] br0: port 1(dummy0) entered blocking state
[ 1803.460832] br0: port 1(dummy0) entered disabled state
[ 1803.460867] dummy0: entered allmulticast mode
[ 1803.460918] dummy0: entered promiscuous mode
[ 1803.464481] br0: port 1(dummy0) entered blocking state
[ 1803.464546] br0: port 1(dummy0) entered forwarding state
[ 1803.687938] dummy0: left allmulticast mode
[ 1803.687968] dummy0: left promiscuous mode
[ 1803.688001] br0: port 1(dummy0) entered disabled state