[ 1689.769432] br0: port 1(dummy0) entered blocking state
[ 1689.769500] br0: port 1(dummy0) entered disabled state
[ 1689.769562] dummy0: entered allmulticast mode
[ 1689.769653] dummy0: entered promiscuous mode
[ 1689.772093] br0: port 1(dummy0) entered blocking state
[ 1689.772152] br0: port 1(dummy0) entered forwarding state
[ 1689.945027] dummy0: left allmulticast mode
[ 1689.945091] dummy0: left promiscuous mode
[ 1689.945156] br0: port 1(dummy0) entered disabled state