[ 1875.553306] br0: port 1(dummy0) entered blocking state
[ 1875.553375] br0: port 1(dummy0) entered disabled state
[ 1875.553458] dummy0: entered allmulticast mode
[ 1875.553538] dummy0: entered promiscuous mode
[ 1875.557164] br0: port 1(dummy0) entered blocking state
[ 1875.557195] br0: port 1(dummy0) entered forwarding state
[ 1875.807099] dummy0: left allmulticast mode
[ 1875.807131] dummy0: left promiscuous mode
[ 1875.807163] br0: port 1(dummy0) entered disabled state