[ 1878.993464] br0: port 1(dummy0) entered blocking state
[ 1878.993523] br0: port 1(dummy0) entered disabled state
[ 1878.993551] dummy0: entered allmulticast mode
[ 1878.993603] dummy0: entered promiscuous mode
[ 1878.997241] br0: port 1(dummy0) entered blocking state
[ 1878.997304] br0: port 1(dummy0) entered forwarding state
[ 1879.270860] dummy0: left allmulticast mode
[ 1879.270906] dummy0: left promiscuous mode
[ 1879.270930] br0: port 1(dummy0) entered disabled state