[ 1571.801216] br0: port 1(dummy0) entered blocking state
[ 1571.801256] br0: port 1(dummy0) entered disabled state
[ 1571.801288] dummy0: entered allmulticast mode
[ 1571.801339] dummy0: entered promiscuous mode
[ 1571.803874] br0: port 1(dummy0) entered blocking state
[ 1571.803907] br0: port 1(dummy0) entered forwarding state
[ 1571.972772] dummy0: left allmulticast mode
[ 1571.972807] dummy0: left promiscuous mode
[ 1571.972836] br0: port 1(dummy0) entered disabled state