[ 1868.990030] br0: port 1(dummy0) entered blocking state
[ 1868.990061] br0: port 1(dummy0) entered disabled state
[ 1868.990087] dummy0: entered allmulticast mode
[ 1868.990126] dummy0: entered promiscuous mode
[ 1868.993277] br0: port 1(dummy0) entered blocking state
[ 1868.993297] br0: port 1(dummy0) entered forwarding state
[ 1869.208815] dummy0: left allmulticast mode
[ 1869.208846] dummy0: left promiscuous mode
[ 1869.208866] br0: port 1(dummy0) entered disabled state