[ 1687.964404] br0: port 1(dummy0) entered blocking state
[ 1687.964481] br0: port 1(dummy0) entered disabled state
[ 1687.964551] dummy0: entered allmulticast mode
[ 1687.964640] dummy0: entered promiscuous mode
[ 1687.967501] br0: port 1(dummy0) entered blocking state
[ 1687.967566] br0: port 1(dummy0) entered forwarding state
[ 1688.160506] dummy0: left allmulticast mode
[ 1688.160536] dummy0: left promiscuous mode
[ 1688.160562] br0: port 1(dummy0) entered disabled state