[ 1643.180453] br0: port 1(dummy0) entered blocking state
[ 1643.180532] br0: port 1(dummy0) entered disabled state
[ 1643.180605] dummy0: entered allmulticast mode
[ 1643.180697] dummy0: entered promiscuous mode
[ 1643.183686] br0: port 1(dummy0) entered blocking state
[ 1643.183722] br0: port 1(dummy0) entered forwarding state
[ 1643.371432] dummy0: left allmulticast mode
[ 1643.371465] dummy0: left promiscuous mode
[ 1643.371497] br0: port 1(dummy0) entered disabled state