[ 1778.254986] br0: port 1(dummy0) entered blocking state
[ 1778.255052] br0: port 1(dummy0) entered disabled state
[ 1778.255123] dummy0: entered allmulticast mode
[ 1778.255204] dummy0: entered promiscuous mode
[ 1778.258856] br0: port 1(dummy0) entered blocking state
[ 1778.258888] br0: port 1(dummy0) entered forwarding state
[ 1778.520530] dummy0: left allmulticast mode
[ 1778.520566] dummy0: left promiscuous mode
[ 1778.520601] br0: port 1(dummy0) entered disabled state