[ 1606.640301] br0: port 1(dummy0) entered blocking state
[ 1606.640379] br0: port 1(dummy0) entered disabled state
[ 1606.640444] dummy0: entered allmulticast mode
[ 1606.640530] dummy0: entered promiscuous mode
[ 1606.643090] br0: port 1(dummy0) entered blocking state
[ 1606.643122] br0: port 1(dummy0) entered forwarding state
[ 1606.828677] dummy0: left allmulticast mode
[ 1606.828743] dummy0: left promiscuous mode
[ 1606.828803] br0: port 1(dummy0) entered disabled state