[ 1807.307923] br0: port 1(dummy0) entered blocking state
[ 1807.307966] br0: port 1(dummy0) entered disabled state
[ 1807.308004] dummy0: entered allmulticast mode
[ 1807.308051] dummy0: entered promiscuous mode
[ 1807.311486] br0: port 1(dummy0) entered blocking state
[ 1807.311550] br0: port 1(dummy0) entered forwarding state
[ 1807.571371] dummy0: left allmulticast mode
[ 1807.571406] dummy0: left promiscuous mode
[ 1807.571437] br0: port 1(dummy0) entered disabled state