[ 1823.491567] br0: port 1(dummy0) entered blocking state
[ 1823.491626] br0: port 1(dummy0) entered disabled state
[ 1823.491663] dummy0: entered allmulticast mode
[ 1823.491720] dummy0: entered promiscuous mode
[ 1823.495491] br0: port 1(dummy0) entered blocking state
[ 1823.495523] br0: port 1(dummy0) entered forwarding state
[ 1823.757523] dummy0: left allmulticast mode
[ 1823.757565] dummy0: left promiscuous mode
[ 1823.757593] br0: port 1(dummy0) entered disabled state