[ 1631.853086] br0: port 1(dummy0) entered blocking state
[ 1631.853124] br0: port 1(dummy0) entered disabled state
[ 1631.853160] dummy0: entered allmulticast mode
[ 1631.853211] dummy0: entered promiscuous mode
[ 1631.856590] br0: port 1(dummy0) entered blocking state
[ 1631.856623] br0: port 1(dummy0) entered forwarding state
[ 1632.078694] dummy0: left allmulticast mode
[ 1632.078789] dummy0: left promiscuous mode
[ 1632.078853] br0: port 1(dummy0) entered disabled state