[ 1722.490023] br0: port 1(dummy0) entered blocking state
[ 1722.490077] br0: port 1(dummy0) entered disabled state
[ 1722.490115] dummy0: entered allmulticast mode
[ 1722.490168] dummy0: entered promiscuous mode
[ 1722.493046] br0: port 1(dummy0) entered blocking state
[ 1722.493110] br0: port 1(dummy0) entered forwarding state
[ 1722.681756] dummy0: left allmulticast mode
[ 1722.681795] dummy0: left promiscuous mode
[ 1722.681855] br0: port 1(dummy0) entered disabled state