[ 1621.419945] br0: port 1(dummy0) entered blocking state
[ 1621.419989] br0: port 1(dummy0) entered disabled state
[ 1621.420022] dummy0: entered allmulticast mode
[ 1621.420070] dummy0: entered promiscuous mode
[ 1621.423056] br0: port 1(dummy0) entered blocking state
[ 1621.423086] br0: port 1(dummy0) entered forwarding state
[ 1621.619298] dummy0: left allmulticast mode
[ 1621.619327] dummy0: left promiscuous mode
[ 1621.619356] br0: port 1(dummy0) entered disabled state