[ 1908.498014] br0: port 1(dummy0) entered blocking state
[ 1908.498085] br0: port 1(dummy0) entered disabled state
[ 1908.498162] dummy0: entered allmulticast mode
[ 1908.498245] dummy0: entered promiscuous mode
[ 1908.501581] br0: port 1(dummy0) entered blocking state
[ 1908.501612] br0: port 1(dummy0) entered forwarding state
[ 1908.707613] dummy0: left allmulticast mode
[ 1908.707645] dummy0: left promiscuous mode
[ 1908.707671] br0: port 1(dummy0) entered disabled state