[ 1833.307425] br0: port 1(dummy0) entered blocking state
[ 1833.307463] br0: port 1(dummy0) entered disabled state
[ 1833.307502] dummy0: entered allmulticast mode
[ 1833.307552] dummy0: entered promiscuous mode
[ 1833.311356] br0: port 1(dummy0) entered blocking state
[ 1833.311394] br0: port 1(dummy0) entered forwarding state
[ 1833.583893] dummy0: left allmulticast mode
[ 1833.583931] dummy0: left promiscuous mode
[ 1833.583963] br0: port 1(dummy0) entered disabled state