[ 1601.898983] br0: port 1(dummy0) entered blocking state
[ 1601.899061] br0: port 1(dummy0) entered disabled state
[ 1601.899130] dummy0: entered allmulticast mode
[ 1601.899223] dummy0: entered promiscuous mode
[ 1601.902072] br0: port 1(dummy0) entered blocking state
[ 1601.902135] br0: port 1(dummy0) entered forwarding state
[ 1602.090612] dummy0: left allmulticast mode
[ 1602.090644] dummy0: left promiscuous mode
[ 1602.090672] br0: port 1(dummy0) entered disabled state