[ 1842.155759] br0: port 1(dummy0) entered blocking state
[ 1842.155805] br0: port 1(dummy0) entered disabled state
[ 1842.155839] dummy0: entered allmulticast mode
[ 1842.155890] dummy0: entered promiscuous mode
[ 1842.159396] br0: port 1(dummy0) entered blocking state
[ 1842.159428] br0: port 1(dummy0) entered forwarding state
[ 1842.416532] dummy0: left allmulticast mode
[ 1842.416567] dummy0: left promiscuous mode
[ 1842.416599] br0: port 1(dummy0) entered disabled state