[ 1566.029492] br0: port 1(dummy0) entered blocking state
[ 1566.029531] br0: port 1(dummy0) entered disabled state
[ 1566.029561] dummy0: entered allmulticast mode
[ 1566.029623] dummy0: entered promiscuous mode
[ 1566.032552] br0: port 1(dummy0) entered blocking state
[ 1566.032615] br0: port 1(dummy0) entered forwarding state
[ 1566.224966] dummy0: left allmulticast mode
[ 1566.225002] dummy0: left promiscuous mode
[ 1566.225091] br0: port 1(dummy0) entered disabled state