[ 1820.959613] br0: port 1(dummy0) entered blocking state
[ 1820.959667] br0: port 1(dummy0) entered disabled state
[ 1820.959701] dummy0: entered allmulticast mode
[ 1820.959759] dummy0: entered promiscuous mode
[ 1820.963391] br0: port 1(dummy0) entered blocking state
[ 1820.963426] br0: port 1(dummy0) entered forwarding state
[ 1821.218340] dummy0: left allmulticast mode
[ 1821.218383] dummy0: left promiscuous mode
[ 1821.218413] br0: port 1(dummy0) entered disabled state