[ 1668.534295] br0: port 1(dummy0) entered blocking state
[ 1668.534372] br0: port 1(dummy0) entered disabled state
[ 1668.534453] dummy0: entered allmulticast mode
[ 1668.534541] dummy0: entered promiscuous mode
[ 1668.537035] br0: port 1(dummy0) entered blocking state
[ 1668.537069] br0: port 1(dummy0) entered forwarding state
[ 1668.710496] dummy0: left allmulticast mode
[ 1668.710531] dummy0: left promiscuous mode
[ 1668.710586] br0: port 1(dummy0) entered disabled state