[ 1587.514811] br0: port 1(dummy0) entered blocking state
[ 1587.514882] br0: port 1(dummy0) entered disabled state
[ 1587.514957] dummy0: entered allmulticast mode
[ 1587.515044] dummy0: entered promiscuous mode
[ 1587.517948] br0: port 1(dummy0) entered blocking state
[ 1587.517980] br0: port 1(dummy0) entered forwarding state
[ 1587.719895] dummy0: left allmulticast mode
[ 1587.719922] dummy0: left promiscuous mode
[ 1587.719951] br0: port 1(dummy0) entered disabled state