[ 1908.139844] br0: port 1(dummy0) entered blocking state
[ 1908.139884] br0: port 1(dummy0) entered disabled state
[ 1908.139915] dummy0: entered allmulticast mode
[ 1908.139968] dummy0: entered promiscuous mode
[ 1908.143123] br0: port 1(dummy0) entered blocking state
[ 1908.143156] br0: port 1(dummy0) entered forwarding state
[ 1908.378864] dummy0: left allmulticast mode
[ 1908.378904] dummy0: left promiscuous mode
[ 1908.378990] br0: port 1(dummy0) entered disabled state