[ 1748.456739] br0: port 1(dummy0) entered blocking state
[ 1748.456777] br0: port 1(dummy0) entered disabled state
[ 1748.456812] dummy0: entered allmulticast mode
[ 1748.456862] dummy0: entered promiscuous mode
[ 1748.459656] br0: port 1(dummy0) entered blocking state
[ 1748.459717] br0: port 1(dummy0) entered forwarding state
[ 1748.642385] dummy0: left allmulticast mode
[ 1748.642413] dummy0: left promiscuous mode
[ 1748.642441] br0: port 1(dummy0) entered disabled state