[ 1823.273641] br0: port 1(dummy0) entered blocking state
[ 1823.273721] br0: port 1(dummy0) entered disabled state
[ 1823.273789] dummy0: entered allmulticast mode
[ 1823.273874] dummy0: entered promiscuous mode
[ 1823.277349] br0: port 1(dummy0) entered blocking state
[ 1823.277388] br0: port 1(dummy0) entered forwarding state
[ 1823.537590] dummy0: left allmulticast mode
[ 1823.537623] dummy0: left promiscuous mode
[ 1823.537659] br0: port 1(dummy0) entered disabled state