[ 1621.997448] br0: port 1(dummy0) entered blocking state
[ 1621.997498] br0: port 1(dummy0) entered disabled state
[ 1621.997530] dummy0: entered allmulticast mode
[ 1621.997582] dummy0: entered promiscuous mode
[ 1622.000111] br0: port 1(dummy0) entered blocking state
[ 1622.000149] br0: port 1(dummy0) entered forwarding state
[ 1622.176762] dummy0: left allmulticast mode
[ 1622.176803] dummy0: left promiscuous mode
[ 1622.176838] br0: port 1(dummy0) entered disabled state