[ 1712.329276] br0: port 1(dummy0) entered blocking state
[ 1712.329342] br0: port 1(dummy0) entered disabled state
[ 1712.329404] dummy0: entered allmulticast mode
[ 1712.329483] dummy0: entered promiscuous mode
[ 1712.331962] br0: port 1(dummy0) entered blocking state
[ 1712.331998] br0: port 1(dummy0) entered forwarding state
[ 1712.505986] dummy0: left allmulticast mode
[ 1712.506012] dummy0: left promiscuous mode
[ 1712.506042] br0: port 1(dummy0) entered disabled state