[ 1815.390652] br0: port 1(dummy0) entered blocking state
[ 1815.390702] br0: port 1(dummy0) entered disabled state
[ 1815.390736] dummy0: entered allmulticast mode
[ 1815.390783] dummy0: entered promiscuous mode
[ 1815.393557] br0: port 1(dummy0) entered blocking state
[ 1815.393622] br0: port 1(dummy0) entered forwarding state
[ 1815.585313] dummy0: left allmulticast mode
[ 1815.585341] dummy0: left promiscuous mode
[ 1815.585366] br0: port 1(dummy0) entered disabled state