[ 1612.497153] br0: port 1(dummy0) entered blocking state
[ 1612.497195] br0: port 1(dummy0) entered disabled state
[ 1612.497230] dummy0: entered allmulticast mode
[ 1612.497275] dummy0: entered promiscuous mode
[ 1612.499674] br0: port 1(dummy0) entered blocking state
[ 1612.499701] br0: port 1(dummy0) entered forwarding state
[ 1612.684148] dummy0: left allmulticast mode
[ 1612.684220] dummy0: left promiscuous mode
[ 1612.684275] br0: port 1(dummy0) entered disabled state