[ 1913.333720] br0: port 1(dummy0) entered blocking state
[ 1913.333789] br0: port 1(dummy0) entered disabled state
[ 1913.333857] dummy0: entered allmulticast mode
[ 1913.333939] dummy0: entered promiscuous mode
[ 1913.337442] br0: port 1(dummy0) entered blocking state
[ 1913.337474] br0: port 1(dummy0) entered forwarding state
[ 1913.600483] dummy0: left allmulticast mode
[ 1913.600512] dummy0: left promiscuous mode
[ 1913.600551] br0: port 1(dummy0) entered disabled state