[ 1622.078192] br0: port 1(dummy0) entered blocking state
[ 1622.078238] br0: port 1(dummy0) entered disabled state
[ 1622.078272] dummy0: entered allmulticast mode
[ 1622.078327] dummy0: entered promiscuous mode
[ 1622.081242] br0: port 1(dummy0) entered blocking state
[ 1622.081309] br0: port 1(dummy0) entered forwarding state
[ 1622.289753] dummy0: left allmulticast mode
[ 1622.289801] dummy0: left promiscuous mode
[ 1622.289831] br0: port 1(dummy0) entered disabled state