[ 1868.294389] br0: port 1(dummy0) entered blocking state
[ 1868.294465] br0: port 1(dummy0) entered disabled state
[ 1868.294535] dummy0: entered allmulticast mode
[ 1868.294622] dummy0: entered promiscuous mode
[ 1868.298586] br0: port 1(dummy0) entered blocking state
[ 1868.298623] br0: port 1(dummy0) entered forwarding state
[ 1868.581432] dummy0: left allmulticast mode
[ 1868.581474] dummy0: left promiscuous mode
[ 1868.581546] br0: port 1(dummy0) entered disabled state