[ 1664.395261] br0: port 1(dummy0) entered blocking state
[ 1664.395335] br0: port 1(dummy0) entered disabled state
[ 1664.395406] dummy0: entered allmulticast mode
[ 1664.395488] dummy0: entered promiscuous mode
[ 1664.398234] br0: port 1(dummy0) entered blocking state
[ 1664.398270] br0: port 1(dummy0) entered forwarding state
[ 1664.583371] dummy0: left allmulticast mode
[ 1664.583405] dummy0: left promiscuous mode
[ 1664.583431] br0: port 1(dummy0) entered disabled state