[ 1720.005885] br0: port 1(dummy0) entered blocking state
[ 1720.005952] br0: port 1(dummy0) entered disabled state
[ 1720.006014] dummy0: entered allmulticast mode
[ 1720.006092] dummy0: entered promiscuous mode
[ 1720.008542] br0: port 1(dummy0) entered blocking state
[ 1720.008579] br0: port 1(dummy0) entered forwarding state
[ 1720.183276] dummy0: left allmulticast mode
[ 1720.183336] dummy0: left promiscuous mode
[ 1720.183407] br0: port 1(dummy0) entered disabled state