[ 2134.302461][ T1875] br0: port 1(dummy0) entered blocking state
[ 2134.302653][ T1875] br0: port 1(dummy0) entered disabled state
[ 2134.302821][ T1875] dummy0: entered allmulticast mode
[ 2134.303642][ T1875] dummy0: entered promiscuous mode
[ 2134.326019][ T1876] br0: port 1(dummy0) entered blocking state
[ 2134.326226][ T1876] br0: port 1(dummy0) entered forwarding state
[ 2136.287478][   T12] dummy0: left allmulticast mode
[ 2136.287695][   T12] dummy0: left promiscuous mode
[ 2136.288424][   T12] br0: port 1(dummy0) entered disabled state