[ 1867.479765][ T9642] br0: port 1(dummy0) entered blocking state
[ 1867.479956][ T9642] br0: port 1(dummy0) entered disabled state
[ 1867.480124][ T9642] dummy0: entered allmulticast mode
[ 1867.481105][ T9642] dummy0: entered promiscuous mode
[ 1867.506365][ T9643] br0: port 1(dummy0) entered blocking state
[ 1867.506642][ T9643] br0: port 1(dummy0) entered forwarding state
[ 1869.499073][   T12] dummy0: left allmulticast mode
[ 1869.500296][   T12] dummy0: left promiscuous mode
[ 1869.500650][   T12] br0: port 1(dummy0) entered disabled state